Encryption tool that uses X.509 certificates. Crypto4 Files is integrated into Windows Explorer, this software for Windows lets you easily sign/verify and encrypt/decrypt your files with X.509 certificates.

Crypto4 Files lets you use X.509 certificates (Digital ID, often used to sign and encrypt e-mail) to sign and encrypt files.

File signing lets your partners or friends check that the file you sent them or placed to archive was really sent by you. File encryption lets you give files to your partner or friend and at the same time ensure that only he or she can see the contents of the file. You can also use file encryption to secure files for yourself (i.e. just encrypt files and decrypt them later using your own certificate).
Algorithms and standards used in file signing and encryption are the same as the ones used in secure Internet connections and secure mail.

Crypto4 Files seamlessly integrates into Windows Explorer to provide easy access to file manipulation functions.

The license of this software is Freeware, you can free download and free use this file encryption software.