Practical Cryptography

10MESSAGE DIGEST ALGORITHM 5

BAYZID ASHIK HOSSAIN

Contents

Keywords

10.1 General Properties and Vulnerabilities

10.2 Design Principle

10.3 Algorithm Description

10.3.1 Add Padding Bits behind the Input Message

10.3.2 Add a 64-Bit Binary String That Is the Representation of the Message’s Length

10.3.3 Initialize Four 32-Bit Values

10.3.4 Compress Every 512-Bit Block

10.3.5 Generate the 128-Bit Output

10.4 An Example

10.5 Implementation 1

10.6 Implementation 2

10.7 Conclusion

References

Keywords

Authentication check

Hash function

Integrity check

Message digest

A message digest algorithm such as MD5 is also known as a hash function or a cryptographic hash function. It takes a message as input and generates a fixed-length output in response, which ...