cSHAKE256 is a customizable variant of the SHAKE256 extendable-output function (XOF) from the SHA-3 family. It allows for domain separation through function name and customization string parameters.

Features

• Variable output length (256-2048 bits)
• Domain separation through function name and customization string
• Based on the secure SHA-3 algorithm
• Resistant to length extension attacks

Common Uses

• Cryptographic applications requiring domain separation
• Key derivation functions (KDFs)
• Message authentication codes (MACs)
• Random number generation

Checksum Applications

While cSHAKE256 can be used for checksums, it is typically overkill for simple checksum applications. However, it becomes valuable when you need:

• Domain separation between different types of checksums
• Customizable output lengths for specific applications
• Additional security features beyond simple error detection

For standard checksum applications, simpler algorithms like CRC32 or MD5 are often more practical.

Security Considerations

• Provides 256-bit security against collision attacks
• Resistant to all known cryptanalytic attacks
• NIST-approved for cryptographic applications