ChaCha20 Stream Cipher

High-speed stream cipher designed by Daniel J. Bernstein, paired with Poly1305 in modern TLS.

Core Principles & Analysis

• Descends from Salsa20, an eSTREAM competition finalist.
• Outperforms AES on devices lacking hardware acceleration.
• Constant-time design resists cache-timing side channels.

Specifications & Metrics

• KEY SIZES: 256 bit