uuid

There are two different ways of generating a UUID. If you just need a unique ID, you want a version 1 or version 4. Version 1: This generates a unique ID based on a network card MAC address and current time. If any of these things is sensitive in any way, don’t use this. The … Read more

Type 3 and Type 5 UUIDs are just a technique of stuffing a hash into a UUID: Type 1: stuffs MAC address+datetime into 128 bits Type 3: stuffs an MD5 hash into 128 bits Type 4: stuffs random data into 128 bits Type 5: stuffs an SHA1 hash into 128 bits Type 6: unofficial idea … Read more