CryptoExpert Lite is free encryption software that uses an on-the-fly encryption system to encrypt and decrypt data.

Data is stored in encrypted form, but is decrypted on-the-fly when requested by any application. Conversely, unencrypted data to be stored is encrypted instantaneously and then stored.

The CryptoExpert system mounts a volume file to create a 'virtual drive' that appears to applications and users like any other physical drive.

Any data that the user attempts to write to this drive is intercepted by CryptoExpert, encrypted and written to the volume file.

Attempts to read from this volume are also intercepted, and the relevant data is read by CryptoExpert from the volume file, decrypted and presented to the application trying to read the data.