83Plus:OS:Certificate/Headers:Fields:041
From WikiTI
Synopsis
Field Number: 041h
Purpose Validation Number
Usual Size 2h
This field holds validation number. It is calculated MD5 hashing the calculator ID and then RSA validating it with the 0A2 field. The first low two bytes of this number are the validation number, which of course, like all certificate fields, is stored big endian.