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Explanations
The purpose of the integrity hash is to ensure that the content of files has been fully retained during transfer - for example, to ensure compliance.
Calculating an integrity hash requires only read permissions on the source system - the 'source' hash is calculated from memory.
After the file being transferred has been written to the target system, it is then read and a 'target' hash is calculated.
The two hash values are then compared.IntegrityHash