Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1995-12-29
1999-02-09
Tarcza, Thomas H.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 23, 380 25, 380 49, H04L 900, H04K 100
Patent
active
058704744
ABSTRACT:
A control system provides secure transmission of programs, including at least one of video, audio, and data, between a service provider and a customer's set top unit over a digital network. Program bearing data packets are recieved in a first network protocol over a first data link and removed from the first network protocol. Packets representing a particular program requested by a customer having a set top unit are selected. Conditional access is provided to the selected program. In particular, program bearing packets are encrypted according to a first encryption algorithm using a first key, which is then encrypted according to a second encryption algorithm using a second key. The first keys are transported in packets to the customer's set top units along with the program packets. A public key cryptographic technique encrypts the second key such that the public key used in the encryption corresponds to the private key of the customer's set top unit. After the conditional access layers have been added, the packets are encapsulated and output in a second network protocol destined for the set top unit.
REFERENCES:
patent: 33189 (1861-03-01), Lee et al.
patent: 4405829 (1983-09-01), Rivest et al.
patent: 4531020 (1985-07-01), Wechselberger et al.
patent: 4613901 (1986-09-01), Gilhousen et al.
patent: 4634807 (1987-01-01), Chorley et al.
patent: 4912762 (1990-03-01), Lee et al.
patent: 5029207 (1991-07-01), Gammie
patent: 5124117 (1992-06-01), Tatebayashi et al.
patent: 5237610 (1993-08-01), Gammie
patent: 5341525 (1994-08-01), Wasilewski et al.
patent: 5381481 (1995-01-01), Gammie et al.
patent: 5400401 (1995-03-01), Wasilewski et al.
patent: 5420866 (1995-05-01), Wasilewski
patent: 5473692 (1995-12-01), Davis
patent: 5481542 (1996-01-01), Logston et al.
patent: 5481613 (1996-01-01), Ford et al.
patent: 5557678 (1996-09-01), Ganesan
patent: 5557765 (1996-09-01), Lipner et al.
patent: 5559889 (1996-09-01), Easter et al.
patent: 5563950 (1996-10-01), Easter et al.
patent: 5568552 (1996-10-01), Davis
patent: 5583939 (1996-12-01), Chang et al.
Diffle, et al, "Authentication and Authenticated Key Exchanges," Designs, Codes and Cryptography 2,107-125 (1992).
Bruce Schneier, "Applied Cryptography," 357-363 (1995).
Menezes et al, "Handbook of Applied Cryptography," 506-525 (1996).
MPEG Systems International Standards Reference (ISO/IEC JTC1/SC29/WG11 NO801, Nov., 1994, ISO Reference No. 13818-1.
Wasilewski, A., "Universal Multi-Program Multiplex and Transport for MPEG-2 Systems", International Organization for Standardization, ISO/IEC JTC1/SC29/WG11 MPEG 93/170, (Jan. 1993).
Wasilewski, A., An MPEG-2 Multi-Program Multiplex Syntax International Organization for Standardization, ISO/IEC JTC1/SC29/WG11 MPEG 93/170, (Jan. 1994).
Wasilewski, A., "Requirements and Method for High-Level Multiplexing of MPEG and Other Digital Service Citstreams with Universal Transport Layer", International Organization for Standardization, ISO/IEC JTC1/SC2/WG11 MPEG 92/754, (Nov., 1992).
Logston Gary Lee
Wasilewski Anthony John
Woodhead Douglas F.
Barnhardt III Hubert J.
Gardner Kelly A.
Massaroni Kenneth M.
Sayadian Hrayr A.
Scientific-Atlanta, Inc.
LandOfFree
Method and apparatus for providing conditional access in connect does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for providing conditional access in connect, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for providing conditional access in connect will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1956842