EncryptFile

EncryptFile["password", file] generates an encrypted version of a file, using the specified password.

EncryptFile["password", source, target] generates an encrypted version of source, putting the result in target.

EncryptFile[keyspec, source, ...] encrypts using the cryptographic key specification keyspec.

Examples

Encrypt a file with a password:

EncryptFile["mypassword", "data.txt", "data.enc"]

Please visit the official Wolfram Language Reference for more details.