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| | Appendix E | The Digital Dilemma: Intellectual Property in the Information Age | Committee on Intellectual Property ... |
 | | For instance, if the cleartext is "OneIfBy" and the key is "CallMeIshmael," the first character of the key ("C") would indicate that the "O" should be shifted right by 3 (to become "R"), the "n" shifted right by 1 (to become "o"), and so on. |
 | | Unfortunately, it is usually impractical to use a one-time pad, because its security depends on a new key being generated and used each time a new message is encrypted; this means that the total number of key bits is too large to be practical. |
 | | That is, it is infeasible for anyone to infer any information about the cleartext from the ciphertext, even if that person has access to the key generation, encryption, and decryption procedures. |
| www.nap.edu /html/digital_dilemma/appE.html (7232 words) |
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