Method and apparatus for the secure printing of a document
First Claim
1. A method for securely controlling the printing of a plaintext document generated by a first source, the method comprising the steps of:
- receiving at a printer via a first communication channel a first key sent by the first source;
obtaining at the printer a second key based on communication between the printer and a second source;
receiving at the printer from the second source via a second communication channel an encrypted version of the plaintext document;
decrypting at the printer using the first and second keys the encrypted version of the plaintext document to obtain the plaintext document at the printer; and
printing with the printer the plaintext document obtained at the printer via the decrypting at the printer of the encrypted version of the plaintext document.
3 Assignments
0 Petitions
Accused Products
Abstract
A method for securely controlling the printing of a plaintext document generated by a first source includes the steps of receiving at a printer via a first communication channel a first key sent by the first source and obtaining at the printer a second key based on communication between the printer and a second source. The printer receives from the second source via a second communication channel an encrypted version of the plaintext document. The printer decrypts, using the first and second keys, the encrypted version of the plaintext document to obtain the plaintext document at the printer and then prints the plaintext document. A system incorporates the method.
41 Citations
17 Claims
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1. A method for securely controlling the printing of a plaintext document generated by a first source, the method comprising the steps of:
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receiving at a printer via a first communication channel a first key sent by the first source;
obtaining at the printer a second key based on communication between the printer and a second source;
receiving at the printer from the second source via a second communication channel an encrypted version of the plaintext document;
decrypting at the printer using the first and second keys the encrypted version of the plaintext document to obtain the plaintext document at the printer; and
printing with the printer the plaintext document obtained at the printer via the decrypting at the printer of the encrypted version of the plaintext document. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for securely transmitting and printing documents comprising:
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a computer system that encrypts a plaintext document using a first key thereby creating an encrypted document, the computer system including means for electronically transmitting the encrypted document via a first communication channel;
a server connected to the first communication channel to receive the encrypted document from the computer system, the server including memory for storing the encrypted document, a processor for encrypting the encrypted document using a second key thereby creating a double-encrypted document, means for electronically transmitting the double-encrypted document via a second communication channel;
a printer connected to the second communication channel, the printer having means for communicating with the server via the second communication channel to determine the second key and to receive the double-encrypted document from the server, means for receiving the first key from the computer system upon request, means for decrypting the double-encrypted document using the first and second keys to obtain the plaintext document, and means for printing a only a predetermined number of copies of the plaintext document obtained from the decrypting of the double-encrypted document by the printer.
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17. A method for securely controlling the recording of an unencrypted digital content generated by a first source, the method comprising the steps of:
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receiving at a recording device via a first communication channel a first key sent by the first source;
obtaining at the recording device a second key based on communication between the recording device and a second source;
receiving at the recording from the second source via a second communication channel an encrypted version of the unencrypted digital content;
decrypting at the recording device using the first and second keys the encrypted version of the unencrypted digital content to obtain the unencrypted digital content at the recording device; and
recording on a recording medium with the recording device the unencrypted digital content obtained at the recording device via the decrypting at the recording device of the encrypted version of the unencrypted digital content.
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Specification