Cisco Technology, Inc.

Nds Corporation

Michael Burns

Leonid Sandler

In one embodiment, a processing device includes a memory to store an executable program including a multiplicity of encrypted component blocks such that different combinations of blocks selected from the encrypted component blocks are operative when decrypted and executed to perform a same functionally equivalent data transformation, each of the component blocks being operative upon execution to convert input data into output data, and a processor operative to receive a selection of cryptographic keys, decrypt some of the encrypted component blocks using the cryptographic keys such that each one of the some encrypted component blocks is decrypted with a different one of the cryptographic keys yielding a multiplicity of decrypted component blocks, and execute the executable program including the multiplicity of decrypted component blocks to perform the same functionally equivalent data transformation. Related apparatus and methods are also described.

Code diversity method and system

A software diversity system including an executable provider to provide an executable program including component blocks such that different combinations of blocks are operative to perform a functionally encryption keys functionally equivalent data transformation, a cipher to encrypt the component blocks with cryptographic keys, a key selector to select a first selection of keys for a first device, such that the first selection is operative to decrypt a first combination of the blocks operative when executed to perform the same functionally equivalent data transformation, and select a second selection of keys for a second device, such that the second selection is operative to decrypt a second combination of the blocks operative when executed to perform the same functionally equivalent data transformation, and a transfer module to prepare for transfer the first and second selection of cryptographic keys for transfer to the first and second device, respectively. Related apparatus and methods are also included.

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Jerusalem, Israel

Michael Burns