SHA-256 in slow motion (8-bit model)

About this app

The SHA-256 compression function as a living circuit diagram: registers a to h, Ch, Maj, Σ0, Σ1 and the adders with live values on every wire, playable step by step, every operation with its bitwise calculation. The app computes a teaching model with 8-bit words and 32 rounds following exactly the rules of the original (padding, message schedule, constants from prime roots); the real SHA-256 is shown alongside. The avalanche view shows how one changed letter flips half of all bits round by round.

Subject: Computer science

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