# `argon2-cffi`

Release v21.1.0 (What’s new?).

Argon2 won the Password Hashing Competition and argon2-cffi is the simplest way to use it in Python and PyPy:

    >>> from argon2 import PasswordHasher
    >>> ph = PasswordHasher()
    >>> hash = ph.hash("s3kr3tp4ssw0rd")
    >>> hash
    '$argon2id$v=19$m=102400,t=2,p=8$tSm+JOWigOgPZx/g44K5fQ$WDyus6py50bVFIPkjA28lQ'
    >>> ph.verify(hash, "s3kr3tp4ssw0rd")
    True
    >>> ph.check_needs_rehash(hash)
    False
    >>> ph.verify(hash, "t0t411ywr0ng")
    Traceback (most recent call last):
      ...
    argon2.exceptions.VerifyMismatchError: The password does not match the supplied hash

argon2-cffi’s documentation lives at Read the Docs, the code on GitHub. It’s rigorously tested on Python 3.5+, and PyPy3.

It implements Argon2 version 1.3, as described in Argon2: the memory-hard function for password hashing and other applications.

# argon2-cffi for Enterprise

Available as part of the Tidelift Subscription.

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## User’s Guide

- Argon2
- Installation
- API Reference
- Choosing Parameters
- CLI
- Frequently Asked Questions

## Project Information

- Backward Compatibility
- How To Contribute
- Changelog
- Credits & License

# Indices and tables

- Index

- Search Page