An electronic digital signature is often used when sending messages or other forms of data online. Unlike a generic electronic signature, which is generally referred to as any type of electronic data meant to carry the intent of a signature, an electronic digital signature is often encrypted to protect data being sent though channels that may be insecure. Sending a message or other form of data with a digital signature ensures that the contents will remain unchanged. It also verifies that the message was sent by the sender. A private encryption key is often used in regard to digital signatures. Legal contracts are often sent using an electronic digital signature in order to prevent tampering and ensure the validity of the data sent to recipients. electronic digital signatures are generally extremely difficult to forge or fake, making them popular when dealing with sensitive data to minimize risk and assure validity.