00413nas a2200097   4500000000100000008004100001260008200042100002000124245009800144490007300242       2005                            d  cMar 2005 bNational Chiao Tung UniversityaHsinchu, Taiwan, Republic of China1 aMing-Hsin Chang00aOn Proxy Signatures with Forward-Secure and One-time Properties and their Applications in PKI0 vDoctor of Philosophy in Computer Science and Information Engineering