This is a novel software integrating encryption technology with decryption technology.The features of this software can be concluded as follow:
(1) Base on the encryption engine of microsoft,the software with mandatory
encryption technology can be applied to all types of documents, and the
encrypted document is stored in a special format.

(2) With the correct password, the encrypted document will be directly
executed without decrypting as another file stored in the hard disk.
Especially, execution of the encrypted document does not depend on
this software.In other words, the encrypted document can be executed
in the computers without installed this software.

(3) After executing, the encrypted document still remains the encrypted
state.
(4) The encrypted document even can be set the number of executions.
Once reaching the number, the encrypted document will be automatically
deleted.

It is an effective measure to ensure document's security.