國立臺灣大學資訊工程學系Yu, Chia-MuChia-MuYuLyuu, Yuh-DauhYuh-DauhLyuu2006-09-272018-06-292006-09-272018-06-292004-07-18http://ntur.lib.ntu.edu.tw//handle/246246/20060927122847429329In this paper, we investigate a quantum cryptosystem with perfect secrecy and message authentication. In an insecure quantum chan-nel that Bob communicates with Alice, we provide a cryptosystem allowing Alice to encrypt and authenticate an n-qubit message by 2n qubits with probability at least 1 − 1 2 O(n) that Alice and Bob can de-tect eavesdropper(Eve), and we prove our quantum cryptosystem has perfect secrecy, that is, we can guarantee that nobody can steal any useful information from encrypted message.application/pdf152700 bytesapplication/pdfzh-TWQuantumCryptosystemAuthenticationotherhttp://ntur.lib.ntu.edu.tw/bitstream/246246/20060927122847429329/1/thesis_r91922045.pdf