However, what was more sharply criticized was the failure of LastPass to migrate older accounts to their new default, with many older accounts being left at 5,000 iterations and even reports of accounts with the iterations set to as low as 1. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. Honestly, the entire vault is heavily encrypted and the encryption key is your master pass, the ability for a hacker or somebody to decrypt your vault would be nearly impossible especially if you have BitWarden setup with all the proper security settings like 2FA and high enough KDF Iterations to prevent brute force. a_cute_epic_axis • 6 mo. The point of argon2 is to make low entropy master passwords hard to crack. Based on the totality of the evidence available to date (as summarized above), my best guess is that the master password hash stored in the cloud database became corrupted when you changed the KDF iterations. Among other. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. The point of argon2 is to make low entropy master passwords hard to crack. With the warning of ### WARNING. Higher KDF iterations can help protect your master password from being brute forced by an attacker. I don’t think this replaces an. Low KDF alert: A new alert will appear in the web app when a user's KDF iterations are lower than. Navigate to the Security > Keys tab. Unless there is a threat model under which this could actually be used to break any part of the security. I have done so with some consternation because I am sensitive to the security recommendation inherent in the warning message. Currently, as far as I know, Bitwarden is the only password manager that offers the ability to directly import their password-protected . The user probably wouldn’t even notice. Check the upper-right corner, and press the down arrow. I didn’t realize it was available as I had been looking in the extension and desktop apps, not realizing a different option existed in the web vault. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). Unless there is a threat model under which this could actually be used to break any part of the security. Additionally, there are some other configurable factors for scrypt, which. My understanding is that a strong master password should still be secure even with a low number of KDF iterations, but for a product like a password manager, the bar should probably be higher than that. Unless there is a threat model under which this could actually be used to break any part of the security. Ask the Community. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. 1 was failing on the desktop. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. More is better, up to a certain point. I think the . Thanks… This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. The KDF iterations increase the cracking time linearly, so 2,000,000 will take four times as long to crack (on average) than 500,000. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. The current KDF, PBKDF2 uses little to no memory, and thus scales very well on GPUs which have a comparatively low amount o… Ok, as an update: I have now implemented scrypt for the mobile clients. Bitwarden currently has a default setting of 100,001 iterations client-side with an additional 100,000. Instead of KDF iterations, there is a “Work Factor” which scales linearly with memory and compute. Exploring applying this as the minimum KDF to all users. Don't worry about changing any of the knobs or dials: just change KDF algorithm completely. •. ago. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. A question: For purposes of risk/benefit analysis, how does the hashing/encryption process differ from what is done in the regular encrypted export?With the ambiguity in some of the Bitwarden staff responses, it is difficult to say at this time what is going on. Unless there is a threat model under which this could actually be used to break any part of the security. Therefore, a. The user probably. Higher KDF iterations can help protect your master password from being brute forced by an attacker. 2 Likes. Unless there is a threat model under which this could actually be used to break any part of the security. (The key itself is encrypted with a second key, and that key is password-based. Can anybody maybe screenshot (if. They need to have an option to export all attachments, and possibly all sends. 12. Regarding password protected exports, the key is generated through pbkdf2 and stretched using hkdf. I went into my web vault and changed it to 1 million (simply added 0). We are in the process of onboarding an organization and I would like to be able to set a security baseline by having a default KDF iteration count for all accounts on the organization level. I. Hey @l0rdraiden see earlier comments, including Encryption suggestions (including Argon2) - #24 by cscharf for more information. In src/db/models/user. Both the admin web server side and my Bitwarden clients all currently show a KDF iterations value of 100000. alfonsojon (Jonathan Alfonso) May 4, 2023, 2:46pm 1. Feb 4, 2023. Remember FF 2022. Feature name Provide a way for an admin to configure the number of minimum KDF iterations for users within an organization. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. Among other. Bitwarden 2023. Additionally, there are some other configurable factors for scrypt, which. What is your KDF iteration set to, in the bitwarden web vault settings? Reply diamondgoal. log file is updated only after a successful login. However, what was more sharply criticized was the failure of LastPass to migrate older accounts to their new default, with many older accounts being left at 5,000 iterations and even reports of accounts with the iterations set to as low as 1. ## Code changes - manifestv3. One thing I would like an opinion on: the current PBKDF only needs an Iteration count, and sends this via tha API / stores it. Expand to provide an encryption and mac key parts. Increasing KDF interations grb January 2, 2023, 6:30pm 2 Nothing wrong with your approach, but it may be unnecessarily cautious. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. Higher KDF iterations can help protect your master password from being brute forced by an attacker. Making just one more comment, because your post is alluding to password managers in general, Bitwarden uses a completely different KDF, in their case, PBKDF-HMAC-SHA256, which is only CPU hard, and not memory hard. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. The KDF iterations increase the cracking time linearly, so 2,000,000 will take four times as long to crack (on average) than 500,000. 9,603. Can anybody maybe screenshot (if. Therefore, a. I think the . 5s to 3s delay after setting Memory. The point of argon2 is to make low entropy master passwords hard to crack. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. Higher KDF iterations can help protect your master password from being brute forced by an attacker. log file is updated only after a successful login. Yes and it’s the bitwarden extension client that is failing here. Then edit Line 481 of the HTML file — change the third argument. One component which gained a lot of attention was the password iterations count. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. 10. Provide a way for an admin to configure the number of minimum KDF iterations for users within an organization. Exploring applying this as the minimum KDF to all users. LastPass had (and still has) many issues, but one issue was allowing low iterations (1 or 500) on their KDF. log file is updated only after a successful login. feature/argon2-kdf. For which i also just created a PR #3163, which will update the server-side to at least 350_000 iterations instead of 100_000. Ask the Community. I think the . Then edit Line 481 of the HTML file — change the third argument. Mobile: The C implementation of argon2 was held up due to troubles building for iOS. While you are at it, you may want to consider changing the KDF algorithm to Argon2id. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. ddejohn: but on logging in again in Chrome. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. Because the contents of this file are expunged if you ever log out (which can happen unexpectedly, if your session expires, if you change your master password or KDF iterations, if Bitwarden resets their servers, etc. Hi, I currently host Vaultwarden version 2022. See here. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. There are many reasons errors can occur during login. 0. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. Source: personal experience with a low-end smartphone taking 10-15s to unlock the vault with max KDF iterations count. Mobile: The C implementation of argon2 was held up due to troubles building for iOS. One of the Hacker News commenters suggestions which sounds reasonable is to upgrade the user to the current default KDF iterations upon a change of the master password. Now I know I know my username/password for the BitWarden. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. Bitwarden Community Forums Master pass stopped working after increasing KDF. Therefore, a. Steps To Reproduce Set minimum KDF iteration count to 300. My understanding is that a strong master password should still be secure even with a low number of KDF iterations, but for a product like a password manager, the bar should probably be higher than that. Change the ** KDF iterations** to 600000 (Six Hundred Thousand) or higher! Keep in mind that this doesn't do you much good however if you have a weak master password. Don't worry about changing any of the knobs or dials: just change KDF algorithm completely. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. This is equivalent to the effect of increasing your master password entropy by 2 bits, because log2(2000000/500000) = log2(4) = 2. Unless there is a threat model under which this could actually be used to break any part of the security. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. You can do both, but if you're concerned about iterations being too low, add 1-2 extra chars. 1 was failing on the desktop. Argon2 KDF Support. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. wasn’t the whole point of logging me out of all my devices to force me to log back in using the new KDF iterations va. I’m writing this to warn against setting to large values. With the warning of ### WARNING. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. Hi all, Attempting to update the KDF iteration number as suggested and saw it stated that “You will need to log back in and complete two-step login setup. Onto the Tab for “Keys”. Therefore, a. wasn’t the whole point of logging me out of all my devices to force me to log back in using the new KDF iterations value? grb January 26, 2023, 3:43am 17. I think the . If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. Your master password is used to derive a master key, using the specified number of. I have created basic scrypt support for Bitwarden. ## Code changes - manifestv3. What you did there has nothing to do with the client-side iteration, that is only for storing the password hash by Vaultwarden. The increase to 600k iterations is the new default for new accounts. Unless there is a threat model under which this could actually be used to break. And low enough where the recommended value of 8ms should likely be raised. Click the Change KDF button and confirm with your master password. Memory (m) = . I think PBKDF2 will remain the default for audits and enterprise where FIPS-140 compliance is an expectation. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. Unless there is a threat model under which this could actually be used to break any part of the security. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. 2 or increase until 0. The user probably wouldn’t even notice. The point of argon2 is to make low entropy master passwords hard to crack. recent information has brought to light that Bitwarden has a really low KDF iteration on cloud-hosted (5,000) and a relatively low default on self-hosted instances (~100,000). Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). More specifically Argon2id. Click the Change KDF button and confirm with your master password. It has also changed. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. . I just found out that this affects Self-hosted Vaultwarden as well. However, what was more sharply criticized was the failure of LastPass to migrate older accounts to their new default, with many older accounts being left at 5,000 iterations and even reports of accounts with the iterations set to as low as 1. If you want to avoid feelings of inadequacy when Bitwarden ups the default iterations to 600,000 in a month or two, you can go ahead and increase your KDF iteration value to 600k. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on devices with slower CPUs. Therefore, a rogue server could send a reply for. 833 bits of. Question about KDF Iterations. iOS limits app memory for autofill. My account was set to 100000 by default!! To change it log into your WebUI and go to Account > Security > Keys. It has to be a power of 2, and thus I made the user configurable work factor a drop down selection. Hi, as in for the same reason as in Scrypt KDF Support , I decided to add Argon2 support. 1Password also uses end-to-end AES-256 bit encryption to encrypt user data, but there’s one thing that Bitwarden does better than 1Password is that the user can change the KDF iterations up to. Export your vault to create a backup. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. rs I noticed the default client KDF iterations is 5000:. More recently, Bitwarden users raised their voices asking the company to not make the same mistake. ## Code changes We just inject the stateservice into the export service to get the KDF type and iterations, and write them into the exported json/use them to encrypt. Bitwarden's default KDF iterations is actually pretty low, it sits at 5,000 server-side iterations. Yes, you can increase time cost (iterations) here too. Please keep in mind that for proper cracking rigs with a lot more GPU power the difference between PBKDF2 cracking and Argon2 cracking will be even greater!The KDF iterations increase the cracking time linearly, so 2,000,000 will take four times as long to crack (on average) than 500,000. Higher KDF iterations can help protect your master password from being brute forced by an attacker. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). app:web-vault, cloud-default, app:all. Exploring applying this as the minimum KDF to all users. After changing that it logged me off everywhere. Feel free to resume discussion on Github: Discussions · bitwarden/server · GitHub Discussions · bitwarden/clients · GitHub Discussions · bitwarden/mobile · GitHubI think the . Instead of KDF iterations, there is a “Work Factor” which scales linearly with memory and compute. 1 Like mgibson (Matt Gibson) January 4, 2023, 4:57pm 6 It is indeed condition 2. Then edit Line 481 of the HTML file — change the third argument. Do beware, Bitwarden puts a limit of 10 iteration rounds because in QA testing, it was unlimited, which lead to a tester having a 30 minute unlock time (1k+ iterations at 1GiB memory). 000 iter - 38,000 USD. 12. Exploring applying this as the minimum KDF to all users. Exploring applying this as the minimum KDF to all users. 8 Likes. Keep in mind having a strong master password and 2FA is still the most important security aspect than adding additional bits of. This is equivalent to the effect of increasing your master password entropy by 2 bits, because log2(2000000/500000) = log2(4) = 2. In contrast, Dmitry Chestnykh wrote a well-researched piece in 2020 (with an update in January 2023) that describes exactly how a brute-force attack against a stolen Bitwarden vault would be possible using only 100,000 PBKDF2 iterations (or the KDF iteration value set by the user) per password guess, and even proposed an improved authentication. Al… Doubt it. My understanding is that a strong master password should still be secure even with a low number of KDF iterations, but for a product like a password manager, the bar should probably be higher than that. Can anybody maybe screenshot (if. Therefore, a rogue server could send a reply for. I think the . For scrypt there are audited, and fuzzed libraries such as noble-hashes. For algorithm, I choose PBKDF2 SHA-256 and set my iterations to 500,000. It's set to 100100. So I go to log in and it says my password is incorrect. In contrast, increasing the length of your master password increases the. However, what was more sharply criticized was the failure of LastPass to migrate older accounts to their new default, with many older accounts being left at 5,000 iterations and even reports of accounts with the iterations set to as low as 1. The user probably wouldn’t even notice. This strengthens vault encryption against hackers armed with increasingly powerful devices. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. Kyle managed to get the iOS build working now,. (for a single 32 bit entropy password). By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. Sometimes Bitwarded just locks up completely. Code Contributions (Archived) pr-inprogress. 5s to 3s delay or practical limit. I have created basic scrypt support for Bitwarden. Addition info from the team, does this sound like the issue: [Android] When account it set to maximum 2,000,000 PBKDF iterations cannot log on · Issue #2295 · bitwarden/mobile · GitHub I changed my KDF from 100k to 300k, so nowhere near that limit, and I am unable to login to the web vault. Can anybody maybe screenshot (if. Code Contributions (Archived) pr-inprogress. This pull request changes the export and import to remove the hardcording, such that they work with different iteration counts and different KDF types. End of story. Okay. Please (temporarily) set your KDF to 100000 iterations of PBKDF2-HMAC-SHA256, then time the unlock delay on your large production vault. I don’t think this replaces an. Kyle managed to get the iOS build working now,. Vaultwarden works! More data, on the desktop I downgraded the extension for FF to 2022. Hit the Show Advanced Settings button. json: csp should be "extension page*s*", and add wasm-unsafe-eval so we can load the wasm. Bitwarden Community Forums Master pass stopped working after increasing KDF. Click on the box, and change the value to 600000. Then edit Line 481 of the HTML file — change the third argument. Currently, KDF iterations is set to 100,000. The point of argon2 is to make low entropy master passwords hard to crack. Higher KDF iterations can help protect your master password from being brute forced by an attacker. Hacker NewsThe title of the report is: "KDF max iterations is [sic] too low", hence why I asked what you felt a better max number would be, so if the issue is the min number, that's different. There are many reasons errors can occur during login. Bitwarden has never crashed, none of the three main devices has ever slowed down when I started the Bitwarden Android app or web extension besides my other apps/programs. Therefore, a rogue server could send a reply for. 995×807 77. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. ), creating a persistent vault backup requires you to periodically create copies of the data. 4. Low KDF iterations. The point of argon2 is to make low entropy master passwords hard to crack. Search for keyHash and save the value somewhere, in case the . Exploring applying this as the minimum KDF to all users. For scrypt there are audited, and fuzzed libraries such as noble-hashes. The title of the report is: "KDF max iterations is [sic] too low", hence why I asked what you felt a better max number would be, so if the issue is the min number, that's different. At our organization, we are set to use 100,000 KDF iterations. I logged in. Aug 17, 2014. Regarding brute force difficulty, kdf_iterations is currently hard-coded to 100,000, which is the same default for a Bitwarden account and Bitwarden Send. Exploring applying this as the minimum KDF to all users. (for a single 32 bit entropy password). Bitwarden Community Forums. My understanding is that a strong master password should still be secure even with a low number of KDF iterations, but for a product like a password manager, the bar should probably be higher than that. Feature function Allows admins to configure their organizations to comply with change in recommendations over time (as hash compute capabilities increase, so does the need for increasing KDF iterations). Can anybody maybe screenshot (if. Feature function Allows admins to configure their organizations to comply with change in recommendations over time (as hash compute capabilities increase, so does the need for increasing KDF iterations). Additionally, there are some other configurable factors for scrypt,. I can’t remember if I. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). Therefore, a rogue server could send a reply for. . Low KDF alert: A new alert will appear in the web app when a user's KDF iterations are lower than industry recommendations, currently 600,000 iterations. I just set it to 2000000 (2 million) which is the max that bitwarden currently allows (Dec 27th 2022) login times: pixel 6 : ~5 seconds lenovo Thinkpad P1 gen 3 (manufactured/assembled 11/16/2020) with Intel(R) Core(TM) i7-10875H 8/16 HT core : ~5 secondsThe server limits the max kdf iterations (even for the current kdf) to an insecure/low value. Looking through the psql schema under the users table, there are 2 columns: password_iterations and client_kdf_iterations. Remember FF 2022. ”. One thing I would like an opinion on: the current PBKDF only needs an Iteration count, and sends this via tha API / stores it. json in a location that depends on your installation, as long as you are logged in. I have created basic scrypt support for Bitwarden. OK, so now your Master Password works again?. The number of KDF iterations is cached in your local vault, so none of this applies unless you are logging in to a Bitwarden client. It’s only similar on the surface. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. Bitwarden Increases KDF iterations to 600k for new accounts and double-encrypts data at rest. Each digit adds ~4 bits. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. If your keyHash value is from later than June 9, 2021, you will need to save a copy of the HTML code of this webpage. Security expert, Dmitry Chestnykh, had mentioned this problem in 2020 , yet it still remains unresolved. I think the . The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. Dear Community I searched this community and the web in general, but I did not find a solution for my problem yet, no matter what I tried. According to comments posted by Quexten at Bitwarden's community forums, the company has a 5-week release cycle, so we could expect Argon2 support to be added next month on all platforms if the tests are successful. Bitwarden Community Forums Master pass stopped working after increasing KDF. Bitwarden currently has a default setting of 100,001 iterations client-side with an additional 100,000. The user probably wouldn’t even notice. Based on the totality of the evidence available to date (as summarized above), my best guess is that the master password hash stored in the cloud database became corrupted when you changed the KDF iterations. A setting of KDF algorithm: Argon2id - KDF iterations: 8 - KDF memory (MB): 96 - KDF parallelism: 6 has always worked thus far. In the thread that you linked, the issue was that OP was running third-party server software that is not a Bitwarden product, and attempting to use a Bitwarden client app to log in to their self-hosted server that was running incompatible software. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. This is equivalent to the effect of increasing your master password entropy by 2 bits, because log2(2000000/500000) =. It has also changed the minimum count to 100,000, which is actually low considering the recommendation from OWASP. Exploring applying this as the minimum KDF to all users. ” From information found on Keypass that tell me IOS requires low settings. In src/db/models/user. Password Manager. Bitwarden has recently made an improvement (Argon2), but it is "opt in". If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. , BitwardenDecrypt), so there is nothing standing in the way of. Then edit Line 481 of the HTML file — change the third argument. ## Code changes - manifestv3. It has to be a power of 2, and thus I made the user configurable work factor a drop down selection. in contrast time required increases exponentially. If you want to do manual brute-force guesses, go to Bitwarden’s interactive cryptography tool. The KDF iterations increase the cracking time linearly, so 2,000,000 will take four times as long to crack (on average) than 500,000. Due to the recent news with LastPass I decided to update the KDF iterations. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. By the way, Sends (which I don’t really use) also have 100K fixed pbkdf2. Bitwarden Community Forums. Among other. Ask the Community Password Manager. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. Bitward setting for PBKDF2 is set low at 100,001 and I think 31,039,488 is better . Bitwarden's default KDF iterations is actually pretty low, it sits at 5,000 server-side iterations. Increasing iterations from the default 64 MB may result in errors while unlocking the vault with autofill. 12. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). No, the OWASP advice is 310,000 iterations, period. log file is updated only after a successful login. The user probably wouldn’t even notice. The point of argon2 is to make low entropy master passwords hard to crack. pub const CLIENT_KDF_ITER_DEFAULT: i32 = 5_000; Was wondering if there was a reason its set so low by default, and if it shouldn't be 100,000 like Bitwarden now uses for their default? Or possibly a configurable option like how PASSWORD_ITERATIONS is. Setting your KDF iterations too high could result in poor performance when logging into (and unlocking) Bitwarden on slower or older devices. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. For scrypt there are audited, and fuzzed libraries such as noble-hashes. Can anybody maybe screenshot (if. Not sure if this is already on the @Quexten’s and Bitwarden devs’ list of things to do, but I think it would be very helpful to update the Interactive Cryptography Tool to include an implementation of the new Argon2 KDF Support (including the ability for users to test the settings for iterations, memory, and parallelism parameters). However, what was more sharply criticized was the failure of LastPass to migrate older accounts to their new default, with many older accounts being left at 5,000 iterations and even reports of accounts with the iterations set to as low as 1. You should switch to Argon2. 0 release, Bitwarden increased the default number of KDF iterations for accounts using the PBKDF2 algorithm to 600,000, in accordance with updated OWASP guidelines. I don’t think this replaces an automatic migration or at least global notifications for iterations set below the default, but it is still a good suggestion. log file is updated only after a successful login. Therefore, a. ddejohn: but on logging in again in Chrome. If that was so important then it should pop up a warning dialog box when you are making a change. That seems like old advice when retail computers and old phones couldn’t handle high KDF. The number of items stored in your vault will not affect the time to complete the KDF calculations during login or unlocking, as the KDF ("Key Derivation Function") is only for the purpose of deriving the account encryption key, which is the symmetric. This operation logs the user out of all accounts in any event so it should be relatively low friction to update the KDF iterations simultaneously. The recent LastPass breach has put a lot of focus on the number of PBKDF2 hash iterations used to derive the decryption key for the password vault. The hash credential to login to Bitwarden servers is only 1 PBKDF2 iteration from the vault master key. But they don’t even store the kdf / iterations in the database, so changing it would require another database migration / backend change which I didn’t really feel like taking on considering how low the risk for a send is anyways. LastPass uses the standard PBKDF2 (Password-Based Key Derivation Function 2). Higher KDF iterations can help protect your master password from being brute forced by an attacker. AbberantSalience (LwS) June 14, 2023, 7:43am 2 I believe the recommended number of iterations is 600,000. Passwords are chosen by the end users. cksapp (Kent) January 24, 2023, 5:23pm 24. Also make sure this is done automatically through client/website for existing users (after they.