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How good are algorithms used in Javascript Math.random() in different browsers? Is it okay to use it for generating salts and one-time passwords?
How many bits from one random I can use?
Nope; JavaScript’s
Math.random()function is not a cryptographically-secure random number generator. You are better off using the JavaScript Crypto Library‘s Fortuna implementation which is a strong pseudo-random number generator (have a look atsrc/js/Clipperz/Crypto/PRNG.js), or the Web Crypto API forgetRandomValues