How does a Hmac work?

Related questions

1. How many passwords are possible with 4 digits?
2. Does brute force attack work?
3. How long does it take to crack a 6 digit password?
4. How many possibilities are there for a 4 digit code?
5. Does Walmart have a union?
6. What is a Mac Crypto?
7. Do engineers have unions?

Tags

1. #hashing
2. #running
3. #message
4. #specified
5. #function
6. #sha256
7. #cryptographic
8. #similar
9. #signatures
10. #authenticated
11. #obtained
12. #secret
13. #authentication
14. #stands
15. #shared
16. #keyed
17. #digital
18. #almost
19. #hmacs