TweetNaCl

The world’s first auditable high-security cryptographic library that fits entirely within 100 tweets.

TweetNaCl delivers the full NaCl API (including Ed25519, Curve25519, and XSalsa20-Poly1305) in just 801 lines of C code. Developed by Daniel J. Bernstein and a team of five security experts, this library eliminates the complexity of traditional crypto implementations to minimize the attack surface. It is completely self-contained, requires zero external dependencies, and is designed specifically for developers who prioritize extreme portability and manual code auditability in high-stakes environments.

https://tweetnacl.cr.yp.to