International Business Machines Corporation

Mark John Lindemann

Sean William Smith

Ronald Perez

Vincenzo Condorelli

Elaine Rivette Palmer

Steve Harris Weingart

Michel Henri Theodore Hack

Jeffrey Kenneth Kravitz

Mario Bizzaro

Gianluca Pedrina

A system for executing a symmetric key cryptographic method includes a processor selecting data paths, a key, an initialization vector, a memory storing batched operation parameters, a bus connected to the processor and the memory, a cryptographic processor connected to the bus and controlled by the processor for performing a plurality of operations according to the operations parameter, wherein data for each operation is received individually and separately from the batched operation parameters, wherein an output for each operation is transmitted separately, and a pair of first-in-first-out (FIFO) state machines controlled by the processor and selectably connected to one of the cryptographic processor and the bus, bypassing the cryptographic processor.

DES hardware throughput for short operations

A symmetric key cryptographic method is provided for short operations. The method includes batching a plurality of operation parameters (), and performing an operation according to a corresponding operation parameter (). The symmetric key cryptographic method is a Data Encryption Standard (DES) method. The short operations can be less than about 80 bytes. The short operations can be between 8 and 80 bytes. The method includes reading the batched parameters from a dynamic random access memory (), and transmitting each operation through a DES engine according to the operations parameter ().

An apparatus for permitting access to protected code, protected data or protected devices only when a computer system is in a trusted state, where said trusted state occurs only when said system is executing trusted code under a set of preselected conditions. This apparatus also has a device for exiting the trusted state and for preventing access to protected code, data and devices when the trusted state is exited. The computer system is also programmed to automatically generate a disabling signal upon the completion of execution of trusted code, and this disabling signal will result in the prevention of access to protected devices or code.

Hardware access control locking

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Pleasantville, NY, United States of America

Mark John Lindemann