A Controllable Parallel CBC Block Cipher Mode of Operation
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To address the requirement for high-speed encryption of large amounts of data, this study improves the widelyadopted cipher block chaining (CBC) mode and proposes a controllable parallel cipher block chaining(CPCBC) block cipher mode of operation. The mode consists of two phases: extension and parallel encryption. In the extension phase, the degree of parallelism n is determined as needed. In the parallel encryption phase, ncipher blocks generated in the expansion phase are used as the initialization vectors to open n parallel encryptionchains for parallel encryption. The security analysis demonstrates that CPCBC mode can enhance the resistanceto byte-flipping attacks and padding oracle attacks if parallelism n is kept secret. Security has been improvedwhen compared to the traditional CBC mode. Performance analysis reveals that this scheme has an almostlinear acceleration ratio in the case of encrypting a large amount of data. Compared with the conventional CBCmode, the encryption speed is significantly faster.
Abstract
To address the requirement for high-speed encryption of large amounts of data, this study improves the widelyadopted cipher block chaining (CBC) mode and proposes a controllable parallel cipher block chaining(CPCBC) block cipher mode of operation. The mode consists of two phases: extension and parallel encryption. In the extension phase, the degree of parallelism n is determined as needed. In the parallel encryption phase, ncipher blocks generated in the expansion phase are used as the initialization vectors to open n parallel encryptionchains for parallel encryption. The security analysis demonstrates that CPCBC mode can enhance the resistanceto byte-flipping attacks and padding oracle attacks if parallelism n is kept secret. Security has been improvedwhen compared to the traditional CBC mode. Performance analysis reveals that this scheme has an almostlinear acceleration ratio in the case of encrypting a large amount of data. Compared with the conventional CBCmode, the encryption speed is significantly faster.
참고문헌 (14)
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