A digital data file encryption system and method where digital data encrypted to a high level and an encryption key are received and stored in a computer. The stored, encrypted digital data is decrypted on the basis of the encryption key and stored in a buffer of a predetermined size. Output digital...http://www.google.com.tw/patents/USRE41942?utm_source=gb-gplus-share專利 USRE41942 - Digital data file encryption apparatus and method and recording medium for recording digital data file encryption program thereon
