# What is meant by “KDF2” vs “PBKDF2”?

I see many references to KDF2 here, but all links are broken and Wikipedia does not have an entry for KDF2. Is KDF2 a specific standard for Key Derivation without a password?

Ultimately, I am trying to make sense of why KDF2 is listed as PRNG for Crypto++ on Wikipedia.

• KDF2 is a specific standard for key-based key derivation. – SEJPM Jul 19 '17 at 15:22