The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 15, 2022
Filed:
Jan. 31, 2020
Facebook Technologies, Llc, Menlo Park, CA (US);
Sudhir Satpathy, Redmond, WA (US);
Wojciech Stefan Powiertowski, Kirkland, WA (US);
Neeraj Upasani, Redmond, WA (US);
Facebook Technologies, LLC, Menlo Park, CA (US);
Abstract
This disclosure describes systems on a chip (SOCs) that prevent side channel attacks (SCAs). The SoCs of this disclosure concurrently operate multi-round encryption and decryption datapaths according to a combined sequence of encryption rounds and decryption rounds. An example SoC of this disclosure includes an engine configured to encrypt transmission (Tx) channel data using a multi-round encryption datapath, and to decrypt encrypted received (Rx) channel data using a multi-round decryption datapath. The SoC further includes a security processor configured to multiplex the multi-round encryption datapath against the multi-round decryption datapath on a round-by-round basis to generate a mixed sequence of encryption rounds and decryption rounds, and to control the engine to encrypt the Tx channel data and decrypt the encrypted Rx channel data according to the mixed sequence of encryption rounds and decryption rounds.