ChaCha20 is a stream cipher and a descendant of Salsa20. It is widely used and recognized for its security and efficiency.
The inputs to ChaCha20 are:
- A 256-bit key, represented as a concatenation of eight 32-bit little-endian integers.
- A 96-bit nonce, represented as a concatenation of three 32-bit little-endian integers.
- A 32-bit block count parameter, represented as a 32-bit little-endian integer.
The output is a sequence of 64 bytes of pseudorandom data.
More details can be found here: https://www.rfc-editor.org/rfc/rfc7539
Funfact: BLAKE(2), relies on a core algorithm borrowed from the ChaCha stream cipher :)
- Simpler Design: ChaCha20 has a simpler structure compared to AES.
- ARX Design: ChaCha20 uses an ARX (Addition-Rotation-XOR) design, which avoids the use of S-Boxes and reduces cache footprint.
- Efficient Key Setup: ChaCha20 features free key setup, meaning it does not incur significant overhead during key initialization.
Here is a detailed comparison of symmetric encryption methods: https://soatok.blog/2020/07/12/comparison-of-symmetric-encryption-methods/
| Category | Count |
|---|---|
| Total rows | 10295 |
| Generic | 2762 |
| EndoMulScalar | 5526 |
| Xor16 | 1338 |
| Zero | 669 |
| Task | Time |
|---|---|
| Compile | 2.213s |
| Prove | 10.685s |
| Verify | 720.243ms |
MacBook Pro M1, 8GB RAM
- Improve test coverage
npm run buildnpm run test
npm run testw # watch modenpm run coveragenpm run exampleThanks to Mahmoud, Boray, and Gregor for their support!