What are the message authentication functions?

Related questions

1. How does a message authentication code work?
2. Is sha1 secure?
3. What is required by the Advanced Encryption Standard?
4. Is sha512 better than sha256?
5. How good is AES 256 encryption?
6. What is the most secure hashing algorithm?
7. How does an HMAC work?
8. What is SHA HMAC?
9. What is Entity Authentication?
10. How does Hmac provide authentication?

Tags

1. #lower
2. #there
3. #function
4. #mechanism
5. #authentication
6. #functions
7. #authenticate
8. #levels
9. #message
10. #produces
11. #value
12. #authenticator
13. #level
14. #functionality
15. #digital
16. #signature