Usually some state's passports grant the holder more privileges than those issued by another state precisley because of the perceived risk of them being (not) o

Usually some state's passports grant the holder more privileges than those issued by another state precisley because of the perceived risk of them being (not) obtained by fraud. Your genuine Sealand passport is less practically useful than a genuine Finnish one for use in the context of international travel. The cryptography aspect is basically preventing the corrupt Sealand government official from stamping out ones that might be confused for, for example, a Finnish one. Sealand[1] being used as an example least likely to cause offense - but you can understand that most governments around the world really do want to ensure that they are the only ones issuing their passports, and hence what that means for their citizens. [1] https://en.wikipedia.org/wiki/Principality_of_Sealand https://en.wikipedia.org/wiki/Principality_of_Sealand