The right coprocessor can help with encryption

Big iron lessons, Part 6: "Encryption is a key aspect of security for any application or system. Furthermore, encryption is algorithmically complex, requiring significant resources for implementation, and most often, significant hardware acceleration. In this sixth and final installment to the Big iron lessons series, you'll get a review of the modern history of crypto and the encoding hardware and software techniques developed for mainframes that can show you the way forward."