Encrypting a digital object on a key ID selected therefor
First Claim
Patent Images
1. A computer-readable medium having computer-executable instructions for producing a key (KD) for decrypting a digital object, the digital object having been encrypted by:
- selecting a key ID for the digital object;
selecting a function ƒ
( ) having an input and an output;
employing the selected key ID as the input to the function ƒ
( );
employing the output of such function ƒ
( ) as the key (KD) for the digital object;
ƒ
(key ID)key (KD),encrypting such digital object according to such key (KD); and
distributing such encrypted digital object, along with the key ID, the computer-readable medium comprising instructions for;
receiving a request for the key (KD) from a requestor, the request including the key ID;
approving the request;
employing the included key ID as the input to the function ƒ
( );
employing the output of such function ƒ
( ) as the requested key (KD);
ƒ
(key ID)key (KD); and
distributing such key (KD) to the requestor.
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Accused Products
Abstract
To encrypt a digital object, a key ID is selected for the digital object, and a function ƒ( ) having an input and an output is selected. The selected key ID is then employed as the input to the function ƒ( ), and the output of such function ƒ( ) is employed as the key (KD) for the digital object: ƒ(key ID)key (KD). The digital object is then according to such key (KD), and the encrypted digital object is distributed.
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Citations
13 Claims
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1. A computer-readable medium having computer-executable instructions for producing a key (KD) for decrypting a digital object, the digital object having been encrypted by:
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selecting a key ID for the digital object; selecting a function ƒ
( ) having an input and an output;employing the selected key ID as the input to the function ƒ
( );employing the output of such function ƒ
( ) as the key (KD) for the digital object;ƒ
(key ID)key (KD),encrypting such digital object according to such key (KD); and distributing such encrypted digital object, along with the key ID, the computer-readable medium comprising instructions for; receiving a request for the key (KD) from a requestor, the request including the key ID; approving the request; employing the included key ID as the input to the function ƒ
( );employing the output of such function ƒ
( ) as the requested key (KD);ƒ
(key ID)key (KD); anddistributing such key (KD) to the requestor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A computer system for requesting a key (KD) for decrypting a digital object, the digital object having been encrypted by:
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selecting a key ID for the digital object; selecting a function ƒ
( ) having an input and an output;employing the selected key ID as the input to the function ƒ
( );employing the output of such function ƒ
( ) as the key (KD) for the digital object;ƒ
(key ID)key (KD),encrypting such digital object according to such key (KD); and distributing such encrypted digital object, along with the key ID the computer system comprising; means for receiving the distributed encrypted digital object, along with the key ID; means for obtaining the key ID from same; and means for sending a request for the key (KD), the request including the key ID, wherein upon approval of the request, the included key ID is employed as the input to the function ƒ
( ) and the output of such function ƒ
( ) as the requested key (KD);ƒ
(key ID)key (KD), andsuch key (KD) being distributed; means for receiving the distributed key (KD). - View Dependent Claims (11)
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12. A computer system for decrypting a digital object, wherein the digital object has been encrypted by:
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selecting a key ID for the digital object; selecting a secret seed having a seed ID; selecting a function ƒ
( ) having an input and an output;employing the selected key ID and the selected seed as the input to the function ƒ
( );employing the output of such function ƒ
( ) as the key (KD) for the digital object;ƒ
(key ID, seed)key (KD),encrypting such digital object according to such key (KD); and distributing such encrypted digital object, along with the key ID and the seed ID, the computer system further comprising; means for receiving the distributed encrypted digital object, along with the key ID and the seed ID; means for obtaining the key ID and seed ID from same; means for sending a request for the key (KD), the request including the key ID and seed ID, wherein upon approval of the request, the secret seed is selected based on the received seed ID; the included key ID and the selected secret seed are employed as the input to the function ƒ
( ); andthe output of such function ƒ
( ) is employed as the requested key (KD);ƒ
(key ID, seed)key (KD),such key (KD) being distributed; and means for receiving the distributed key (KD).
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13. A computer system for decrypting a digital object, wherein the digital object has been encrypted by:
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selecting a key ID for the digital object; selecting a secret seed having a seed ID; selecting a function ƒ
( ) having an input and an output;employing the selected key ID, the selected seed, and the seed ID thereof as the input to the function ƒ
( );employing the output of such function ƒ
( ) as the key (KD) for the digital object;ƒ
(key ID, seed, seed ID)key (KD),encrypting such digital object according to such key (KD); and distributing such encrypted digital object, along with the key ID and the seed ID, the computer system further comprising; means for receiving the distributed encrypted digital object, along with the key ID and the seed ID; means for obtaining the key ID and seed ID from same; means for sending a request for the key (KD), the request including the key ID and seed ID, wherein upon approval of the request, the secret seed is selected based on the received seed ID; the included key ID, the included seed ID, and the selected secret seed are employed as the input to the function ƒ
( ); andthe output of such function ƒ
( ) is employed as the requested key (KD);ƒ
(key ID, seed, seed ID)key (KD),such key (KD) being distributed; and means for receiving the distributed key (KD).
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Specification