Secure communication system with remote key setting
First Claim
1. A secure communication system comprising:
- a remotely selectable means for selecting a key setting variable and at least one unique variable and transmitting a remotely selected key setting variable, the remotely selectable means including a means for reiteratively replacing the key setting variable when the key setting variable is remotely selected, said replacement of said key setting variable occurring the next successive time that remote selection is initiated;
a first means for initiating remote selection, for receiving the transmitted remotely selected key setting variable and for transmitting a secure communication enciphered in accordance with the key setting variable, the first receiving means being unique to said unique variable, said initiation of remote selection occurring each time said first receiving means desires secure communication with another receiving means; and
a second means for initiating remote selection and for receiving communications from the first receiving means, using the key setting variable selected by the remotely selectable means upon initiation by said first receiving means to enable secure communication between said first and second receiving means, said first receiving means receiving a verified reiteratively replaced key setting variable from said remotely selectable means before communication with said second receiving means is accomplished.
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Accused Products
Abstract
An apparatus for maintaining secure communication between subscribers. A trally located key distribution center, which includes a data processor, is utilized as a source of remotely selected working variables which are utilized to enable secure communication between a plurality of selected subscribers. Each subscriber in the system has a unique variable which identifies him to the data processor, and enables a secure communication with the data processor, which will then provide him with the working variable of the subscriber that he wishes to call. The key distribution center also reiteratively replaces the working variable of the caller, and the called subscriber if desired, each time contact is made with the key distribution center.
82 Citations
10 Claims
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1. A secure communication system comprising:
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a remotely selectable means for selecting a key setting variable and at least one unique variable and transmitting a remotely selected key setting variable, the remotely selectable means including a means for reiteratively replacing the key setting variable when the key setting variable is remotely selected, said replacement of said key setting variable occurring the next successive time that remote selection is initiated; a first means for initiating remote selection, for receiving the transmitted remotely selected key setting variable and for transmitting a secure communication enciphered in accordance with the key setting variable, the first receiving means being unique to said unique variable, said initiation of remote selection occurring each time said first receiving means desires secure communication with another receiving means; and a second means for initiating remote selection and for receiving communications from the first receiving means, using the key setting variable selected by the remotely selectable means upon initiation by said first receiving means to enable secure communication between said first and second receiving means, said first receiving means receiving a verified reiteratively replaced key setting variable from said remotely selectable means before communication with said second receiving means is accomplished. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification