Understanding UUID v5
A deterministic identifier generated by hashing a namespace and a specific name.
Key Benefits of UUID v5
- Consistent IDs from the same input
- Deterministic and reproducible
- Uses SHA-1 hashing for security
- Ideal for mapping external IDs to UUIDs
Technical Details
UUID v5 is generated by hashing a namespace UUID and a name string using SHA-1. It allows for the creation of unique IDs that are stable across different systems.
Frequently Asked Questions
Statistically, yes. While not mathematically guaranteed to be unique across all time and space, the probability of generating two identical UUIDs is so small that it's practically impossible in any real-world scenario.
GUID (Globally Unique Identifier) is Microsoft's implementation of the UUID standard. For most practical purposes, they are identical and follow the same format.
Yes, especially v4 and v7, which are generated using cryptographically secure random numbers, making them suitable for session IDs and security-sensitive identifiers.