# A case for password hashing with delegation

DevFeed: [A case for password hashing with delegation](<https://devfeed.tech/articles/a-case-for-password-hashing-with-delegation-29179.md>)

Original publisher: [Read original article](<https://www.latacora.com/blog/2023/12/22/case-for-password-hashing/>)

Published: 2023-12-22T15:18:16Z

Content type: article

Language: en

Sources: [Latacora](<https://devfeed.tech/sources/latacora.md>)

Topics: [passwords](<https://devfeed.tech/topics/passwords.md>), [hashing](<https://devfeed.tech/topics/hashing.md>), [Security](<https://devfeed.tech/topics/security.md>), [Encryption](<https://devfeed.tech/topics/encryption.md>), [Cryptography](<https://devfeed.tech/topics/cryptography.md>)

Tags: [cryptographic](<https://devfeed.tech/tags/cryptographic.md>), [delegation](<https://devfeed.tech/tags/delegation.md>), [encryption](<https://devfeed.tech/tags/encryption.md>), [hashing](<https://devfeed.tech/tags/hashing.md>), [parallel](<https://devfeed.tech/tags/parallel.md>), [password](<https://devfeed.tech/tags/password.md>), [security](<https://devfeed.tech/tags/security.md>)

## AI overview

This article explains password-based key derivation functions and examines delegated password hashing, in which computation is offloaded to an untrusted server. It discusses how delegation could increase the work factor for systems constrained by weaker devices, with particular attention to encryption-key derivation in end-to-end encrypted backup systems.

## Source excerpt

When people talk about PBKDFs (Password Based Key Derivation Functions), this is usually either in the context of secure password storage, or in the context of how to derive cryptographic keys from potentially low-entropy passwords. The Password Hashing Competition (PHC, 2013-2015) was an open competition to derive new password hashing algorithms, resulting in Argon2 hash as its winner. Apart from achieving general hash security, many of the candidates focused on achieving resistance to parallel attacks on available hardware such as GPUs.