... encrypted message into its original form.ã Plaintext is a message in its original form.ã Ciphertext is a message in its encrypted form.Since this course is an introduction to encryption, we should ... encryption, confidentiality, integrity, authentication, and non-repudiation. Confidentiality is concerned with preventing, detecting, or deterring the improper disclosure of information. Basically, ... unauthorized person should not be able to modify data, or if they do, it must be detectable. Authentication is involved with identifying who an individual is. If you think you are talking to Eric,...