Tag
merkle-damgard
- Jun 2, 2026 The Merkle-Damgård Construction and the Padding That Binds It How a fixed-width compression function is iterated into a variable-length hash, why the padding encodes the message length, and which attacks the iteration rule leaves open. cryptography
- Apr 10, 2026 Why HMAC Hashes Twice and What Length Extension Has to Do With It The nested construction that turns a plain hash into a keyed MAC, the Merkle-Damgard weakness it neutralises, and why the two fixed inner and outer pads are load-bearing. cryptography