Patent
Information processing apparatus with replaceable security element
James Neil Esserman,Paul Moroney +1 more
- 16 Aug 1991
135
TL;DR: In this paper, a field upgradeable security system deciphers signals received from a communication network using a working key (WK) generated by an information processor, whose working key is communicated to the information processor encrypted under a secret key.
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Abstract: A field upgradeable security system deciphers signals received from a communication network. An information processor (10) include, a receptacle for receiving a replaceable security element (12). The replaceable security element generates a working key (WK) necessary to the operation of the information processor. The working key is communicated to the information processor encrypted under a secret key (A(M)). The information processor decrypts the encrypted working key for use in deciphering a received communication signal. additional layers of encryption (A(C), U(M), U(C)) can be added to the communications between the information processor and security element to increase the level of security.
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Citations
Patent
Method and apparatus for selectively retrieving information from a source computer using a terrestrial or satellite interface
Douglas M. Dillon,Vivek Gupta +1 more
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TL;DR: In this article, a user can select whether data downloaded from a network (such as the Internet) is transmitted to the requesting terminal via a high-speed link, such as a satellite link, or a lower speed link,such as a terrestrial link.
438
Patent
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Minhtam Nguyen
- 24 Oct 1995
TL;DR: In this paper, a three-way password authentication system is proposed, which uses three-level password authentication, encrypting different portions of a logon packet with different keys based on the nature of the communications link.
315
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Personal access management system
William Cedric Johnson,Donald L. Marx +1 more
- 13 Feb 1995
TL;DR: In this article, a multi-component system for linking a user to a product or service provider includes a user processing device, a storage device, and a provider device, which are coupled to each other to form a user device which communicates with the provider device.
296
Patent
Independent external security module for a digitally upgradeable television signal decoder
Keith Gammie,Robert K. Yoneda,Arthur Woo,Wayne c +3 more
- 27 Mar 1992
TL;DR: In this paper, a decoder for descrambling encoded satellite transmissions comprises an internal security module and a resplaceable security module, and the decoder performs a first key decryption using the second secret serial number (SSN2).
290
Patent
Public key data communications system under control of a portable security device
George Meredith Dolan,Christopher J. Holloway,Stephen M. Matyas +2 more
- 03 Feb 1995
TL;DR: In this article, a data communications system is described in which messages are processed using public key cryptography with a private key unique to one or more users under the control of a portable security device (120), such as a smart card, held by each user, the system comprising a server (130) for performing public key processing using the private key.
269
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TL;DR: In this article, a subscription television system in which individual decoders are enabled to receive individually addressed messages is described, and the composite signal, including video and teletext, also comprises addressed packets which are detected by decoder and which indicate that a message addressed to a particular subscriber is forthcoming, and system control data.
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Gilhousen Klein S,Charles F. Newby,E. Moerder Karl +2 more
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TL;DR: In this paper, a system and method for scrambling and selectively descrambling television signals that are transmitted to subscribers' descramblers in a subscription television system is described, and a corresponding tier of DES algorithms are employed at the descramblerto reproduce the encryption keystream; and the TV signal is descrambled in accordance therewith.
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Patent
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Arthur Gordon Mason
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TL;DR: In this paper, a conditional access system for transmitting and receiving scrambled television signals over-air includes means for addressing each of the receiving apparatus with an overair signal whereby to permit reception and descrambling of the signal.
148
Patent
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Gilhousen Klein Shaw,Heller Jerrold Allan,Harding Michael Van,Blakeney Robert Darrel +3 more
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TL;DR: In this article, a system in a subscriber television network for enabling descrambling of a received scrambled signal on a prepaid basis and/or an impulse-purchase basis is described.
122
Patent
Reproduction of secure keys by using distributed key generation data
Bennett Christopher John,Michael V Harding,Moroney Paul +2 more
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TL;DR: In this paper, a key security system provides for the reproduction of secure keys by using distributed key generation data and a distributed encrypted prekey, which is encrypted with a category key in accordance with a second encryption algorithm to produce an encrypted program key.
121
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