Digital signatures can be extremely secure, depending on how powerful the encryption software is. Another type of encryption is stenography. Stenography hides messages inside messages that look harmless. Most often someone who is reading this message doesn t know what that there is a secret message embedded in there. Also there can be fake messages sent.
Encryption is used for many different things.
One of the most common things encryption is used for is e-mail. When encrypting e-mail the sender can also add a digital signature to the message. Usually individuals prefer to send messages with e-mail rather than fax. This is because fax machines have security problems. Using encryption reduces security problems and is a better alternative.