The MD5 message-digest algorithm is a widely used cryptographic hash function producing a 128-bit (16-byte) hash value, typically expressed in text format as a 32 digit hexadecimal number. MD5 has been utilized in a wide variety of cryptographic applications, and is also commonly used to verify data integrity.

The software uses the MD5 algorithm verification document. No matter how the file name or attributes change, if the MD5 value same the file contents are same.