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Identity authentication is the very important component for information security technologies. It is the key to protect the security of information systems. This paper proposes a kind of new hybrid identity authentication technology based on the identity authentication technology of traditional information systems, which is combined with a smart card technology, the chaos theory and fingerprint recognition technology. The new hybrid identity authentication technology has been implemented to apply to a mixed information system, the information system has been designed in the paper. Experimental results show that the security of identity authentication in the information system has been improved. It provides a better research direction to protect the security of information systems.