SYSTEM FOR DECRYPTION AND RE-ENCRYPTION OF FILES

摘要

A machine system (100) for automatic decryption of confidential file da ta on a per-use basis and automatic later elimination of the decrypted data by scorching and/or re-encrypting is disclosed. The following features are provided for secure and automatic recryption: (1) use of file-exclusion lists; (2) us e of application-program exclusion lists; (3) decrypting as needed in response to intercepted file-OPEN requests; (4) encrypting as needed in response to intercepted file-CLOSE requests; (5) delaying post-CLOSE encryption.