Inventor
NISHIOKA MOTOTSUGU
JP7 patents
Patents
7 patentsUS5995626ANov 30, 1999
Electronic shopping method, electronic shopping system and document authenticating method relating thereto
HITACHI LTD112 citations98
US6269445B1Jul 31, 2001
Electronic shopping method, electronic shopping system and document authenticating method relating thereto
HITACHI LTD40 citations95
US5754656AMay 19, 1998
Electronic shopping method, electronic shopping system and document authenticating method relating thereto
HITACHI LTD86 citations95
US6041408AMar 21, 2000
Key distribution method and system in secure broadcast communication
HITACHI LTD46 citations94
US7164765B2Jan 16, 2007
Method of a public key encryption and a cypher communication both secure against a chosen-ciphertext attack
HITACHI LTD15 citations79
US6512829B1Jan 28, 2003
Key distribution method and system in secure broadcast communication
HITACHI LTD8 citations72
US7649991B2Jan 19, 2010
Method of a public key encryption and a cypher communication both secure against a chosen-ciphertext attack
HITACHI LTD1 citations48