Chapter 7: Services of Cryptosystems:

• Cryptosystems provide the following services:
• Confidentiality: Renders the information unintelligible except by authorized entities.
• Integrity: Ensure that data has not been altered by an unauthorized manner since it was created, transmitted, or stored.
• Authentication: After identification has been proven, the individual is then provided with the key or password that will allow access to some resources.
• Nonrepudiation: Ensures the sender cannot deny sending the message.