公开(公告)号：EP1864425A1

公开(公告)日：2007-12-12

申请号：EP06716315.4

申请日：2006-03-10

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE ,  Samsung Electronics Co., Ltd. ,  KT Corporation ,  SK Telecom Co., Ltd. ,  Hanaro Telecom, Inc.

发明人： CHANG, Sung-cheol ,  CHA, Jae-sun ,  CHO, Seok-heon ,  YOON, Chul-sik

IPC分类号： H04L9/06

CPC分类号： H04L9/0637 ,  H04L9/0838 ,  H04L9/12 ,  H04L63/0428 ,  H04L63/062 ,  H04L2209/80 ,  H04W12/02 ,  H04W12/04

摘要： The present invention relates to encryption and decryption apparatuses in a wireless portable Internet system, and a method thereof. In the wireless portable Internet system, a subscriber station and a base station share an encryption during key distribution, and a message is encrypted with the encryption key and transmitted. In this case, a first initial vector is generated for encryption based on information shared by the subscriber station and the base station in a wireless channel, and the message is encrypted with the first initial vector and the encryption key and is then transmitted. In addition, a second initial vector for decryption is generated based on information shared by the subscriber station and the base station in the wireless channel, and the encrypted message is decrypted with the second initial vecrtor and the encryption key. Herein, the first initial vector corresponds to the second initial vector.