Pipelined Encryption Core Virtual Round Noise Generation
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Solution Overview
Problem
Existing encryption circuits are vulnerable to side-channel analysis attacks, where attackers can detect encryption keys by analyzing power consumption and electromagnetic waves, leading to potential security information leaks.
Innovation Solution
The implementation of a pipelined encryption core with multiple round cores performing real and virtual encryption operations in parallel, using a key scheduler to manage real and virtual keys, and an encryption controller to control virtual round operations, making it difficult for attackers to detect real encryption operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional encryption circuit performs only real encryption operations, then encryption speed is maintained, but security is vulnerable to side-channel analysis attacks
Solution Approach 1:
The encryption circuit is segmented into multiple round cores (first round core, second round core, etc.), where each round core can independently perform encryption operations. This segmentation allows the circuit to execute multiple encryption operations simultaneously, creating noise that masks the real encryption operation and prevents side-channel analysis attacks while maintaining manageable circuit complexity through modular design.
2Reliability
If virtual encryption operations are added to prevent side-channel attacks, then security is improved, but power consumption increases
Solution Approach 1:
The encryption circuit continuously performs both real and virtual encryption operations without interruption. By maintaining continuous operation of multiple round cores, the circuit ensures that power consumption remains relatively stable and predictable, making it difficult for attackers to detect real encryption operations through power analysis while avoiding the energy waste associated with intermittent operation.
3Object-affected harmful factors
If multiple round cores perform parallel operations, then resistance to side-channel attacks is improved, but device complexity increases
Solution Approach 1:
Each round core is designed with universal functionality to perform both real encryption operations and virtual encryption operations. The round cores use the same encryption algorithm and structure, allowing them to be interchangeably used for different purposes. This multi-functionality reduces the need for specialized components and simplifies the overall circuit design while maintaining the ability to resist side-channel attacks through parallel operation.
Data Source
AI summary
An encryption circuit includes a pipelined encryption core having a plurality of round cores therein. The pipelined encryption core is configured to perform a real round operation on each of a plurality of pieces of input data received therein and generate encryption data from the input data using an encryption operation comprising the real round operation. An encryption controller is provided, which is coupled to the pipelined encryption core. 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: (i) dummy data, and (ii) a dummy encryption key.