> Systems programming intuition tells you that a 512-bit random number is, to within mind-boggling tolerances, as unguessable as a 521-bit random number. Sure,

> Systems programming intuition tells you that a 512-bit random number is, to within mind-boggling tolerances, as unguessable as a 521-bit random number. Sure, but the other half of systems programming intuition tells you "the end user is going to truncate this value to 8 bits and still expect it to be random".