US 7,529,938 B2
Method, apparatus and system for performing authentication according to challenge-response protocol using scrambled access information
Osamu Shibata, Moriguchi (Japan); Taihei Yugawa, Nara (Japan); Tsutomu Sekibe, Hirakata (Japan); Teruto Hirota, Moriguchi (Japan); Yoshiyuki Saito, Katano (Japan); and Toshihiko Otake, Hyogo (Japan)
Assigned to Panasonic Corporation, Osaka (Japan)
Appl. No. 9/936,157
PCT Filed Jan. 12, 2001, PCT No. PCT/JP01/00159
§ 371(c)(1), (2), (4) Date Sep. 06, 2001,
PCT Pub. No. WO01/52474, PCT Pub. Date Jul. 19, 2001.
Claims priority of application No. 2000-006989 (JP), filed on Jan. 14, 2000; and application No. 2000-041317 (JP), filed on Feb. 18, 2000.
Prior Publication US 2003/0061519 A1, Mar. 27, 2003
Int. Cl. H04L 9/00 (2006.01); G06F 12/14 (2006.01); G06F 17/30 (2006.01); H04N 7/167 (2006.01); H04K 1/00 (2006.01)
U.S. Cl. 713—169  [713/165; 713/190; 380/201; 380/232; 380/255; 380/262; 705/57; 707/9] 7 Claims
OG exemplary drawing
 
1. An authentication communication method comprising:
transmitting scrambled access information from an access apparatus to a storage medium, the scrambled access information generated by scrambling access information, the access information including information designating an area in the storage medium used for storing digital information;
authenticating, in the access apparatus, whether the storage medium is authorized according to a challenge-response authentication protocol using the scrambled access information;
authenticating, in the storage medium, whether the access apparatus is authorized according to a challenge-response authentication protocol without using the scrambled access information; and
reading/writing the digital information from/into the area designated by the access information after the storage medium and the access apparatus have authenticated each other as authorized devices.