Is there any benefit to signing a random number?
E.g. a link for password reset, sent to email, often includes a base64 encoded random number to prevent someone guessing what the password reset link would be. If that number is cryptographically signed or hashed, does it improve the security in any way?
Say, 256-bits of randomness and 256-bits of signature, is that any more secure than just using 512-bits of randomness?