Patent · US Active

Data cryptographic devices and memory systems

US11438154B2 · kind B2 · utility

0Cited by

2References

20Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Muhammad Hassan · Islamabad, PK
Bernhard Rohfleisch · Wolfratshausen, DE
Alexander Zeh · Munich, DE

Key dates

Filing date	Oct 9, 2020
Grant date	Sep 6, 2022
Priority date	—
Expiry date	Nov 12, 2040

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2209/72
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A data cryptographic device may include a pre-tweak generator to generate pre-tweak values, a pre-tweak value cache memory to store one or more pre-tweak values generated by the pre-tweak generator, and a pre-tweak value selector to check whether a pre-tweak value for an input memory address is stored in the pre-tweak value cache memory. The data cryptographic device may further include a tweak generator to generate a tweak value based on the selected pre-tweak value, and a block cipher to perform at least one block cipher algorithm to at least one of encrypt data, encrypt and authenticate data, decrypt encrypted data, decrypt and verify encrypted and authenticated data, using a cryptographic key and the generated tweak value.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.