PRESERVATION OF ENCRYPTION

摘要

An apparatus, method, system and computer-readable medium are provided for preserving an encryption of data when confronted by an attack, such as a side channel analysis (SCA) attack based on a statistical analysis. In some embodiments, hardware, software, and/or firmware associated with an encryption calculation may be exercised or accessed during a background operation when an actual or real operation is not taking place. During the background operation, dummy values for data and one or more keys may be input to the hardware. A switching between the real operation and the background operation may take place seamlessly such that measurement of a physical characteristic associated with the hardware is indistinguishable in terms of when the real and background operations are active. In this manner, the secrecy of a key used in connection with the real operation may be preserved.

主权项

1. A method comprising:
receiving first real data and second real data; executing, by one or more computers, an encryption sequence comprising:
a first plurality of encryption rounds of a first encryption operation using the first real data, wherein a result of executing one encryption round of the first plurality of encryption rounds is used in executing a subsequent encryption round of the first plurality of encryption rounds; anda second plurality of encryption rounds of a second encryption operation using the second real data, wherein one or more of the second plurality of encryption rounds are executed in between two sequential rounds of the first plurality of encryption rounds; and transmitting a result of the first encryption operation and a result of the second encryption operation.