| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method and apparatus for secure transmission of digital data relating to a document between any of a scanner, a printer and a host computer. <P>SOLUTION: At a sending station, a document file is generated, a user-defined character string is inputted by an operator in a user interface. Then, the sending station automatically forms an encryption key based on the user-defined character string and encrypts the document file therewith. A transmission file including the encrypted document file, is then transmitted towards a receiving station, where the encrypted document file is decrypted on the basis of the same user-defined character string as has been entered at the sending station, when the latter is entered in the user interface of the receiving station. No check is done on the validity of the entered character string other than trying to process the decrypted file, but when an incorrect character string is entered, the output of the description is useless. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
