| 摘要 |
<p>A text encrypting apparatus taking a short time for setting up a key for high-speed cryptographic communications, a text decrypting apparatus, a cryptographic communication system, a text encrypting method, a text decrypting method, a program for the text encrypting method, a program for the text decrypting method, and a computer-readable information recording medium having those programs recorded therein. A sender's cryptographic communication apparatus (10) comprises an initial input generating unit (101) for generating an initial input value, an encrypting unit (102) for encrypting the initial input value to generate an intermediate input value, an intermediate output expanding unit (103) for expanding the intermediate input value to generate an expanded output value, a connecting unit (104) for connecting the intermediate output unit and the expanded output value to generate a key stream, a plain text input unit (105) for acquiring a plain text to be encrypted, and an encrypted text calculating unit (106) for generating an encrypted text from the key stream, the initial input value and the plain text.</p> |
