Encryption circuit for performing virtual encryption operation

Abstract

An encryption circuit includes a pipelined encryption core having a plurality of round cores. The pipelined encryption core is configured to perform a real round operation on each of the received multiple input data, and to generate encrypted data from the input data using an encryption operation including the real round operation. An encryption controller coupled with the pipelined encryption core is provided. The encryption controller is configured to control the pipelined encryption core so that at least one of the plurality of round cores performs a virtual round operation as part of the encryption operation. The pipelined encryption core is configured to perform a virtual encryption operation using at least one of the following items: (i) dummy data; and (ii) dummy encryption key.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2018-0119306 filed on October 5, 2018, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The inventive concept relates to an encryption circuit for performing an encryption operation and an operating method thereof, and more particularly, to an encryption circuit for performing a virtual encryption operation and a method for performing virtual encryption. Background technique [0004] Smart cards and integrated circuit (IC) cards include secure information about the user. There is a need for an encryption circuit for preventing security information about a user from leaking due to hacking or the like, which generates and transmits a ciphertext of security information transmitted through a signature or authentication process. [0005] Instead of directly manipulating input or output data, hackers ...

AI Technical Summary

Problems solved by technology

[0005] Hackers may perform side-channel analysis attacks instead of directly manipulating input or output data

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