Multilevel Digital Signature System 3.0_free
A facile and efficient digital signing system for enterprise. Electronic file in any format can be signed by many persons, dependency relationship between different signatures can be build, signer's advises can be involved in the signature. RSA key (1024 bits) ensures signature safety and dynamic transport encryption protects transported information. This is a free edition.

USA Shield 2.15
USA Shield is the suite of encryption tools for personal and professional security. It allows you to protect the privacy of your sensitive files and messages by encrypting them with up to three strong cryptographic algorithms.

Password Protect USB 3.6.1
Password Protect USB is a software program designed to protect an unlimited number of folders with your personal passwords. You can set a password on any folder containing your sensitive data. Install the program on your removable drive and protect/unprotect folders at any computers your drive is connected to. The program supports Windows XP, 98, 2000, NT, ME, Vista. Download Password Protect USB now.

Instant LOCK : Best In File Security 3.0.8
http://InstantLock.NET : With this revolutionary file security software, totally protect, lock and hide folders from other users and programs. Multi user, multi password feature. Works with Windows XP 9x NT 200x Vista Me Locks GBs of data or thousands of files in a second! Just drag and drop your files. Now your files can not be renamed, deleted or seen. Only you can reach them with your password. FREE DOWNLOAD.

FileGuarder 2.5.0
The data encrypts a processing, can according to need born and different edition to the same document, recover appointed edition according to the demand.The customer can use system to provide of encrypt and lead a function, carry on a backup to the document, the document will include that document all history edition data.The customer's can pass a right password then can duct into the backup document, avoiding the leakiness of the document data.