A universally unique identifier (UUID) is a 128-bit number used to identify information in computer systems. The term globally unique identifier (GUID) is also used.
This crate generates and inspects UUIDs based on RFC 4122.
TOML
[dependencies]
simple-uuid = { version = "*", features = ["rand_num"] }
Rust
use simple_uuid::v4;
println!("{}", v4!())
Do not assume that UUIDs are hard to guess; they should not be used as security capabilities.