| Summary: | 碩士 === 國立中興大學 === 應用數學系 === 86 === As the development of cryptosystems, We summary three main
cryptosystems. The first one is "cryptosystem of symmetric key",
the second one is "crypto -system of asymmetric key"(
cyrptosystem of public key), and the third one is "cryptosystem
of key escrow"(cyrptosystem of key recovery). It is to ensure
the privacy and the security of messages by encrypting the
message of communications. However, Criminals encipher those
message in comm -unications to do some crimes. To prevent the
crises, key escrow system was born. Besides, it is also
appreciated and expected by many countries,especial -ly for
industrial and commercial societies. The necessity of "Key
Escrow Encryption System" is obvious and the applications of
key escrow encryption system should be boomed. We implement
the Key Escrow Encryption System on the individual and the
machine bounds", analyze and evaluate the costs(response time)
of each actions in the system, and prove that the implemented
system is practical and useful. Finally, we conclude the
developments and applications of our system in the future.
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