rontolisp:random-bytes

(rontolisp:random-bytes count)

Returns a vector of count cryptographically strong random bytes (each an integer 0-255). Unlike random, which is an ordinary pseudo-random generator, every byte comes from the platform's cryptographic entropy source: java.security.SecureRandom on the interpreter and the JVM, the WASI random_get host function on both WASM backends (wasi:random under --component). That is what makes it suitable for nonces, salts and session identifiers. A --no-wasi module has no entropy source, so the call signals there unless the build passes --host-random (clock and randomness guide).

The values differ on every call, so only the length is shown here.