| Summary: | 碩士 === 國立暨南國際大學 === 電機工程學系 === 91 === Abstract
In traditional symmetric key cryptosystems, there exist some problems such as cryptographic key generation, management of enormous number of cryptographic keys and authentication of clients’ identity. Although asymmetric key cryptosystems can solve those problems, it is a serious drawback that they cannot encrypt and decrypt data fast.
The iris codes are very different since the iris features of human eyes exhibit the high degree of uniqueness. By replacing the traditional DES Iterate table rule with a new iris-code, called iris-cipherkey, constructed from an iris code, the modified DES system, called the Iris Data Encrypted System ﹝IDES﹞, can provide fast encryption and decryption and is more complex than the traditional DES system. Also, by integrating an iris recognition system, the IDES system provides a securer client authentication. In addition, the IDES system is easy to manage the cryptographic keys because the iris feature code for each person is unique. By using the iris code-based cipherkey, the IDES cryptographic system can produce a more complex and securer cryptographic key to increase the security of encrypted techniques.
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