1. A method of facilitating cryptographic processing in a data communication system, the method comprising a processor of a first device in the data communication system: determining, via the processor, for a first set of information sufficient to perform complementary cryptographic processing of cryptographically processed data, additional information supplementary to that of the first set of information, the additional information facilitating the computation of at least one intermediate operation involved in performing the complementary cryptographic processing of the cryptographically processed data; wherein the complementary cryptographic processing comprising verification of a signature of the data; and making the additional information available to a second device in the data communication system to enable the second device to use the additional information in the at least one intermediate operation to facilitate the complementary cryptographic processing of the cryptographically processed data.