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BoxCryptor is a cryptographic virtual harddisk that encrypts all data on-the-fly using the AES-256 standard. Encrypted data is stored in an arbitrary directory of your choice, e.g. one that is synced to the cloud like your Dropbox folder. Access your encrypted files on all devices. We have BoxCryptor for Windows, Android and iOS - and even support Mac OS X and Linux.

When saving files to the virtual harddisk, BoxCryptor encrypts them on-the-fly and stores the encrypted files. When reading files, BoxCryptor decrypts them in real-time so that they are accessible as any other unencrypted file.

BoxCryptor works on individual files at a time and not on container files. That means no need to resize volumes and no problems to synchronize or backup individual files!