Method and apparatus to encrypt plaintext data

Abstract

Disclosed is an apparatus and method for encrypting plaintext data. The method includes: receiving at least one plaintext data input; applying a Nonce through a function to the at least one plaintext data input to create Nonced plaintext data outputs and / or to intermediate values of a portion of an encryption function applied to the at least one plaintext data input to create intermediate Nonced data outputs; and applying the encryption function to at least one of the Nonced plaintext data outputs and / or the intermediate Nonced data outputs to create encrypted output data. The encrypted output data is then transmitted to memory.

Description

technical field [0001] The invention relates to a method and equipment for encrypting plaintext data and decrypting corresponding ciphertext data. Background technique [0002] The use of memory analyzers presents a greater threat to the integrity and confidentiality of the distribution content. Even when great care is taken to protect the data contained within the code, the contents of memory may still be captured by bus sniffing. For example, this can be used to leak the original content after it has been decrypted for rendering in a secure environment, even if the original content is distributed in encrypted form. This can be achieved by "reading" electrical signals corresponding to writes to the memory. Other more sophisticated attacks could even replay these signals to trick the processor into reading and processing data of the attacker's choice. [0003] Content providers often have specific requirements for the handling of original content. At a minimum, the conte...

AI Technical Summary

Problems solved by technology

[0005] Unfortunately, current techniques are often inefficient and may require stronger protection levels, higher throughput at the same level of security without a significant increase in power, and area requirements in terms of hardware implementation

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