Awesome GUID

RFC #4122: UUID - Security Considerations

“Do not assume that UUIDs are hard to guess; they should not be used as security capabilities (identifiers whose mere possession grants access)”. UUIDs are designed to be unique, not to be random or unpredictable: do not use UUIDs as a secret

Awesome Identifiers

A benchmark of all identifier formats

Security Recommendations for Any Device that Depends on Randomly-Generated Numbers

“The phrase ‘random number generator’ should be parsed as follows: It is a random generator of numbers. It is not a generator of random numbers.”