V3b: Hash functions: Relationships between PR, 2PR and CR (Applied Cryptography 101)

Whole-channel inclusion: Cryptography 101 is an honest teaching channel (title sample + 3 transcripts read: The only sample with a transcript is a rigorous academic lecture proving theorems about finite fields, consistent with the channel's teaching-focused verdict.); this title passed a strict title check (sonnet) after a labelling pass.