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Cryptography Research/Rambus Assigned Patent

Protecting cryptographic keys stored in non-volatile memory

Cryptography Research, Inc. (acquired by Rambus), San Jose, CA, has been assigned a patent (11,416,625) developed by Marson, Mark Evan, Carlsbad, CA, and Hamburg, Michael A., San Francisco, CA, for protecting cryptographic keys stored in non-volatile memory.

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Systems and methods for protecting cryptographic keys stored in a non-volatile memory. An example method may comprise: storing a device root key in a non-volatile memory, storing a volatile key in a volatile memory, storing a masked cryptographic key in the non-volatile memory, wherein the masked cryptographic key is produced by combining a cryptographic key and the device root key, storing a masked device root key in the non-volatile memory, wherein the masked root key is produced by combining the device root key and the volatile key, and erasing the device root key from the non-volatile memory.

The patent application was filed on January 30, 2019 (16/963,724).

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