Information processing apparatus with replaceable security element
First Claim
Patent Images
1. A field upgradeable security system for processing signals comprising:
- an information processor having a receptacle for receiving a separate unitary replaceable security element;
said replaceable security element including;
means for generating a working key;
means for encrypting said working key with a secret key; and
means for communicating the encrypted working key to said information processor;
wherein said information processor includes means for decrypting the encrypted working key for use in processing a signal.
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Abstract
A field upgradeable security system deciphers signals received from a communication network. An information processor includes a receptacle for receiving a replaceable security element. The replaceable security element generates a working key necessary to the operation of the information processor. The working key is communicated to the information processor encrypted under a secret key. The information processor decrypts the encrypted working key for use in deciphering a received communication signal. Additional layers of encryption can be added to the communications between the information processor and security element to increase the level of security.
130 Citations
68 Claims
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1. A field upgradeable security system for processing signals comprising:
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an information processor having a receptacle for receiving a separate unitary replaceable security element; said replaceable security element including; means for generating a working key; means for encrypting said working key with a secret key; and means for communicating the encrypted working key to said information processor; wherein said information processor includes means for decrypting the encrypted working key for use in processing a signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A unitary replaceable security element, for use in combination with a separate information processor having a secret cryptographic key, comprising:
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means for generating a working key for use by said information processor in processing a signal; means for receiving said secret key; means for encrypting said working key with said secret key; and means for communicating the encrypted working key to said information processor. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. An information processor, for use in combination with a separate unitary replaceable security element, comprising:
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means for receiving a replaceable security element; memory means for storing a secret cryptographic key associated with the information processor; means for receiving a working key, encrypted under said secret key, from said security element; means coupled to retrieve said secret key from said memory means for decrypting the received working key; and means coupled to use the decrypted working key for processing an information signal. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59)
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60. A field upgradeable security system for processing signals received from a communication network comprising:
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an information processor having a first unit key associated therewith; a security element having a second unit key associated therewith and operatively associated with said information processor for communicating a working key thereto; means operatively associated with said information processor for receiving data encrypted under said first and second unit keys, decrypting said data with said first unit key, and communicating the resultant data still encrypted under said second unit key to said security element; and means operatively associated with said security element for decrypting said resultant data with said second unit key and processing the decrypted, data to generate said working key. - View Dependent Claims (61, 62, 63, 64, 65, 66, 67, 68)
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Specification