3 ms·
> Version 4 is completely randomly generated (hence, it has more entropy) and is what most web systems seem to use. It has 16^32 = 2^128 bits that guarantee uni
by alwaysbeconsing 3y ago
> Version 4 is completely randomly generated (hence, it has more entropy) and is what most web systems seem to use. It has 16^32 = 2^128 bits that guarantee uniqueness and has an insignificant risk of collision.
Small correction here but it is not 128 random bits entirely: 6 bits are reserved for the version marker.