What Is the Minimum Recommended Output Size for a Secure Cryptographic Hash Function Today?
The minimum recommended output size for a secure cryptographic hash function today is generally 256 bits. This size is necessary to provide adequate resistance against both preimage and collision attacks.
A 256-bit hash offers a theoretical 2256 resistance against preimage attacks and 2128 resistance against collision attacks (due to the Birthday Paradox), which is computationally infeasible for the foreseeable future, including against potential quantum attacks.
Glossar
Hash Output
Output ⎊ The cryptographic hash output, prevalent across cryptocurrency, options, and derivatives, represents a fixed-size alphanumeric string generated by a hashing algorithm applied to an input dataset.
Output Size
Throughput ⎊ This parameter defines the rate at which the system can successfully process and finalize data, such as trade confirmations or option settlement results.
Cryptographic Hash
Function ⎊ A cryptographic hash is a mathematical algorithm that transforms an input of arbitrary size into a fixed-size string of characters, known as a hash value or digest.
Cryptographic Hash Function
Computation ⎊ The core function of a cryptographic hash function demands significant computational effort, particularly within Proof-of-Work systems.
Hash Function Output
Result ⎊ The fixed-length string of characters produced by a cryptographic function serves as a unique digital fingerprint for a given input.