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--- ## Encryption ### PLAIN No encryption. Encodes text directly. ### SPECK32/64 ECB Block cipher in ECB mode. Each character is encrypted independently — identical plaintext characters produce identical ciphertext. Useful when you want varied-looking output from the same input, but **not secure under real threat models** since patterns in the plaintext leak through. ### SPECK48/96 CTR Stream cipher mode with a random 24-bit nonce prepended to the output. Identical plaintexts produce different ciphertexts each time. Significantly more secure than ECB. **Rotate your password after roughly every 100 encryptions** to avoid nonce reuse risk within the 24-bit space. ## How ZWUS Works 1. Take each character's Unicode code point. 2. Convert it to the chosen base (3, 6, or 8). 3. Map each resulting digit to its assigned zero-width character from the alphabet. 4. Join digits together; separate characters with the base's designated separator (also zero-width). The result is a string of invisible Unicode that carries the full original text. Decoding reverses the mapping: split on the separator, look up each zero-width character to recover the digit, parse the base-N number back to a code point, and reconstruct the string. ## Use ZWUS in Your Own Projects The encoder/decoder is available as a standalone package for multiple languages: - **JavaScript/TypeScript:** [zwus on npm](https://www.npmjs.com/package/zwus) - **Rust:** [zwus on crates.io](https://crates.io/crates/zwus)