Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
2005-08-23
2005-08-23
Chevalier, Robert (Department: 2616)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000, C386S349000
Reexamination Certificate
active
06934463
ABSTRACT:
An information processing apparatus and an information processing method are capable of preventing information from being copied illegally.To put it in detail, a hash function and a service key are stored in advance in an EEPROM of a DVD player serving as a source. In an EEPROM of a personal computer (PC) serving as a sink, on the other hand, its ID and a license key are stored beforehand. The DVD player requests the PC to transmit the ID. The DVD player then applies the hash function to data resulting from concatenation of the ID with the service key to generate a license key (=hash (ID∥service_key)). Subsequently, the DVD player generates a source side common session key and encrypts the session key by using the generated license key. Then, the DVD player transmits the encrypted source side common session key to the PC. The PC decrypts the encrypted source side common session key by using the license key stored in its EEPROM to produce a sink side common session key which has a value equal to that of the source side common session key.
REFERENCES:
patent: 4549075 (1985-10-01), Saada et al.
patent: 4720859 (1988-01-01), Aaro et al.
patent: 4799061 (1989-01-01), Abraham et al.
patent: 4866707 (1989-09-01), Marshall et al.
patent: 5117458 (1992-05-01), Takaragi et al.
patent: 5148479 (1992-09-01), Bird et al.
patent: 5225664 (1993-07-01), Iijima
patent: 5390252 (1995-02-01), Suzuki et al.
patent: 5883958 (1999-03-01), Ishiguro et al.
patent: 6775382 (2004-08-01), Al-Salqan
patent: 6785813 (2004-08-01), Vanstone et al.
Asano Tomoyuki
Ishiguro Ryuji
Nakano Takehiko
Osakabe Yoshio
Osawa Yoshitomo
Chevalier Robert
Frommer William S.
Frommer & Lawrence & Haug LLP
Sony Corporation
LandOfFree
Information processing apparatus, information processing... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Information processing apparatus, information processing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Information processing apparatus, information processing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3456911