About generation of serial numbers - Amplia

End-user certificates issued by Amplia have a random serial number. By default, CA certificates have a sequential serial number, but if have an on-premises instance you can configure your instance to also issue CA certificates with random serial numbers (see configure CA certificate templates for instructions).

Length and entropy

The random serial numbers generated by Amplia consist of 16-17 bytes generated with a pseudo-random number generator (CSPRNG) having 122 bits of strong entropy.

Examples:

0x33465bdd6636854a842dbee1085c352e
0x00cca41bb584e3c94cb32779d845ec0642