encryption-decryption software

**We have software which creates cryptic keys we need to advance this software by improving the current technologies.** The professional must have excellent knowledge about security and encryption over LAN Using at least 3 of the following encryption algorithms: Gamma, GHOST, RSA, 3DES, BLOWFISH, Rijndael-AES(128/256-bit), IDEA, SEL, RC4 or individual. We need software to be able to encrypt data that is being ftp-ed or/and transferred to external data store devices. So the user can protect your files on USB flash drives, floppies, CD-RW, notebooks, and hard disks, and it doesn't require installation on another PC. Encrypt files, folders, folder’s tree or single device. Right click context menu options to encrypt and decrypt must be added. Lock and hide function are required too. Locked files must be undeletable, forbidden for rename, unmovable, hidden, and inaccessible. Option for volumes encryption must be added too. Option delete original file/source after encryption must be added too. User has to be able to add, remove or extract single files form the encrypted source. Preview function must be added (view files in previous encrypted source). The software must be able to work with big files that the proper OS support. It has to do stable work and quiet fast. If encryption or decryption is about to take too much time, it has display notifying message. Good and stable progress bar is required too. Option to apply some good compression algorithm before encryption (ZIP or individual) Encrypt and decrypt mail to and from known users in real-time. The software runs as a relay agent in the system tray. ## Deliverables Plese respond for more details. ## Platform Windows 98, ME, 2000, XP