Patent
Encryption processing device, encryption processing method, and computer program
Joshi Abe,譲司 阿部 +1 more
- 28 Oct 2003
7
TL;DR: In this paper, a common key block encryption application key is generated from an encryption key as a shared secret key and data processing based on an initial vector composed of arbitrary data that can be properly updated.
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Abstract: PROBLEM TO BE SOLVED: To provide an encryption processing device and an encryption processing method with a high security level reducing the possibility of leakage of a cryptographic key. SOLUTION: A common key block encryption application key is generated from an encryption key as a shared secret key and data processing based on an initial vector composed of arbitrary data that can be properly updated. Based on the generated key, the encryption processing of the data transmitted and received between, for example, data transmitting/receiving devices is performed. The common key block encryption application key is changed in accordance with the value of the successively generated initial vector (IV). By periodically updating the initial vector (IV), the key can be periodically updated. Then, collection of ciphertexts enough for performing power analysis such as differential power analysis (DPA) can be obviated, and the encryption processing and data communication with a high security level can be achieved. COPYRIGHT: (C)2005,JPO&NCIPI
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Citations
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