8. Security Considerations

8. Security Considerations

UUIDs do not provide any guarantee of security, privacy, or unpredictability. UUIDs should not be assumed to be hard to guess and should not be used as security capabilities (identifiers whose mere possession grants access). Nor should UUIDs be assumed to be sufficiently random or pseudorandom for cryptographic purposes.

All the UUIDs in this document may be subject to predictability and correlation attacks through timing, side channels, or other attack vectors. Implementers are encouraged to consider the relevant security considerations in their designs and to exercise appropriate caution when using UUIDs in security-sensitive contexts.

For detailed security considerations related to specific UUID versions and use cases, please refer to the full specification text.