PenProtect is the most comprehensive and secure solution to protect the files within your USB Flash Drive, Flash Memory or Pen Drive.Files are encrypted and protected using your Password and a special technique (AES algorithm 256 bit key). PenProtect requires no installation: it is a single file located in the home folder of your Flash Drive. Ability to encrypt or decrypt only required files. No size limit of encrypted files. Two protection levels (Partial and Total).