# bitwiseshiftleft/sjcl

[DEPRECATED] Stanford Javascript Crypto Library

Repository: https://github.com/bitwiseshiftleft/sjcl
Canonical: https://ross.abutalabs.com/products/sjcl
Homepage: http://bitwiseshiftleft.github.com/sjcl/
Language: JavaScript
License: NOASSERTION
License Family: other
Last push: 2026-03-18T21:29:06+00:00

## Health v2 (maintenance only)
Score: 55/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 72, release rhythm 8, longevity 100
- inputs: {"age_days": 5943, "days_push": 168, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 7201, forks 995 (observed 2026-08-28T04:09:56.582701+00:00)

## What it is
The Stanford Javascript Crypto Library (SJCL) is a JavaScript library providing high-level cryptographic primitives such as AES encryption, ECC, and hashing for web applications. It is officially deprecated and should not be used in new projects.

## Use cases
- encrypt data in the browser with AES
- perform elliptic curve cryptography in JavaScript
- hash and HMAC data client-side
- generate cryptographically secure random numbers in JS
- maintain legacy code that depends on sjcl

## When to choose
- you must maintain or patch an existing codebase already using sjcl
- you need a small, dependency-free crypto library for a legacy browser-only environment

## When to avoid
- starting any new project - the library is deprecated
- you need actively maintained, audited cryptography - use WebCrypto or libsodium instead
- you need protection against known ECC vulnerabilities - only the latest 1.0.9 fixes the ECDH flaw

## Facets
- artifact type: library
- maturity: abandoned
- function: cryptography, security
- domain: security, web-development, developer-tools
- platform: browser
- tags: deprecated, crypto, ecc, aes, javascript, nodejs

## Member repositories
- bitwiseshiftleft/sjcl (main) score 55

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:56.582701+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 2026-08-29T17:39:51.976147+00:00, confidence not recorded.
  - readme: https://github.com/bitwiseshiftleft/sjcl (fetched 2026-08-28T04:09:56.582701+00:00, sha cb4604c74086)
  - registry_npm: https://registry.npmjs.org/sjcl (fetched 2026-08-29T08:35:12.406762+00:00, sha 89317e91614c)
- Data as of 2026-08-30T08:39:29.467469+00:00.