From the secret writing systems of early times to the secure encryption algorithms of today, encryption has been part of the arts of war and diplomacy. Commercial security has now increased in importance to the point that encryption is a common tool in daily business. A requirement for privacysay for patient records and other sensitive datahas moved encryption into the medical market. Even educational records deserve a certain amount of encryption to protect family privacy.
Modern cryptology depends upon thoroughly vetted encryption algorithms, coupled with the secure use and transmission of keys, either public or private. This is the basis of maintaining message confidentiality, integrity, and authenticity.