Dummy data removal in an authenticated encryption with associated data cryptographic scheme

US11360911B2 · kind B2 · utility

Assignee

• Infineon Technologies AG · DE

Inventors

• Manuela Meier · Munich, DE
• Andreas Graefe · Bückeburg, DE

Key dates

• Filing date: Sep 29, 2020
• Grant date: Jun 14, 2022
• Expiry date: Sep 29, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F21/79
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A cryptographic accelerator may include an input buffer to store first data, including a first portion of a message, in a first address range and second data, including a second portion of the message, in a second address range. The cryptographic accelerator may include one or more components to determine lengths of the first and second portions, read the first portion from the first address range, discard any dummy data in the first address range based on an indication of an endpoint of the first data in the first address range, read the second portion from the second address range, and discard any dummy data in the second address range based on an indication of an endpoint of the second data in the second address range. The cryptographic accelerator may include a cryptographic engine to perform a cryptographic operation using the first portion and the second portion.