# in3rsha/sha256-animation

Animation of the SHA-256 hash function in your terminal.

Repository: https://github.com/in3rsha/sha256-animation
Canonical: https://ross.abutalabs.com/products/sha256-animation
Language: Ruby
License: MIT
License Family: permissive
Last push: 2024-03-06T12:11:56+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 2305, "days_push": 910, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3400, forks 168 (observed 2026-08-28T04:08:02.829075+00:00)

## What it is
A Ruby terminal script that animates the SHA-256 hash function step by step, visualizing bitwise operations, message padding, and compression. It also includes scripts for individual SHA-256 operations and double-SHA256 (hash256) used in Bitcoin.

## Use cases
- visualize how sha-256 hashing works step by step
- learn the bitwise operations inside the sha-256 algorithm
- animate a hash computation in the terminal for teaching
- compute double sha256 of bitcoin block headers or transactions
- run individual sha-256 functions like sigma or ch on binary strings

## When to choose
- you want an interactive, visual explanation of SHA-256 internals
- you are teaching or learning cryptography and want to see each step
- you need to inspect double-SHA256 results for Bitcoin data

## When to avoid
- you need a fast production-grade SHA-256 implementation
- you want a GUI or web-based visualization
- you need hashing of large files at speed

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: cryptography, developer-tools, terminal-ui, animation
- domain: security, education, developer-tools
- platform: cli, cross-platform, ruby
- tags: sha256, hash-function, visualization, terminal-animation, bitcoin, educational, cryptocurrency

## Member repositories
- in3rsha/sha256-animation (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:02.829075+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:38:42.591751+00:00, confidence not recorded.
  - readme: https://github.com/in3rsha/sha256-animation (fetched 2026-08-28T04:08:02.829075+00:00, sha 01c5235431ea)
- Data as of 2026-08-30T08:39:29.467469+00:00.