1. A method of verifying that a given application is to be permitted access to a secure function, said method comprising: obtaining code for said given application; obtaining a function cryptographic identifier associated with said given application and associated with said secure function; obtaining a local digital signature as a hash of said code for said given application; decoding said function cryptographic identifier, using a locally-stored public key associated with said secure function, to obtain a function test digital signature; determining that said local digital signature matches said function test digital signature; and responsive to said determining, allowing said application to execute said secure function.