Invention Grant
- Patent Title: Method and apparatus for improving the speed of advanced encryption standard (AES) decryption algorithm
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Application No.: US16531399Application Date: 2019-08-05
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Publication No.: US11606189B2Publication Date: 2023-03-14
- Inventor: Dileep Kumar Kotha
- Applicant: ARRIS Enterprises LLC
- Applicant Address: US GA Suwanee
- Assignee: ARRIS Enterprises LLC
- Current Assignee: ARRIS Enterprises LLC
- Current Assignee Address: US GA Suwanee
- Agency: Chernoff, Vilhauer, McClung & Stenzel, LLP
- Main IPC: H04L29/00
- IPC: H04L29/00 ; H04L9/06 ; G06F17/16

Abstract:
A method is provided for decrypting data encrypted according to a cipher key according the advanced encryption standard (AES). The method includes precomputing a product of each element value of an InvMixColumn matrix and each possible value of an input state array and deriving a set of round keys from the cipher key and the set of round keys. The deriving includes providing an initial round key and a plurality of further round keys, performing an initial decryption round, and performing N full decryption rounds at least in part using the precomputed product of each element value of an InvMixColumn matrix and each possible value of the input state array.
Public/Granted literature
- US20200044822A1 METHOD AND APPARATUS FOR IMPROVING THE SPEED OF ADVANCED ENCRYPTION STANDARD (AES) DECRYPTION ALGORITHM Public/Granted day:2020-02-06
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