Nodeum provides data integrity validation in each workflow, the three main different mechanisms are available : checksums (e.g. CRC32), non-cryptographic hashes (e.g. xxHash) and cryptographic hashes (e.g. MD5).
Definition
- MD5 : This hash algorithm is a commonly used function for validating data integrity. An MD5 checksum is a 32 digit hexadecimal number that represents the hash of the contents of a file. The calculation of an MD5 is an industry standard so the integrity can be checked on any system.
- xxHash : It is an Extremely fast Hash algorithm, the hash is faster to be generated. It is highly portable, and hashes are identical across all platforms (little / big endian). This is more and more popular in the video device, Nodeum uses the xxHash64be algorithm which is compatible with other product and software in the industries.
Benefits
This type of verification which compare checksum/hash is a great way to ensure that a file has not been changed during its life-cycle. It is always possible to do a calculation at the source and at the destination and compare both. Nodeum automates the calculation process in the workflow which improves the end-user experience and the time to operate.
Furthermore the Integrity Checksum Analysis allows the verification of the integrity of the data processed by Nodeum against a reference list.
How to proceed ?
In each workflow definition, when defining a new task, browser to others options panel and you can activate the option you prefer : MD5-Hash or xxHash64.
Compare the result with original Checksum
Once your task ran, you can compare the final list Checksums with the original calculated Checksums.
To do so, in the information of the task, under Processed filed, you can click on the 
Button. This will import the checksum list into the Integrity Checksum Analsys feature.
How to analyze the Integrity Checksum ?
When you launched the Check Integrity utility, the following screen will be displayed:
You can now upload your reference Checksum report(s) into the utility.
To do so, click the 
button and select the report files.
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❗❗ Information about Reference Checksum Report Format. The reference MUST
The reference MAY
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Once your Reference Checksum report is uploaded, Nodeum allows to discard lines that don't contain relevant information.
Once you have selected the line to discard, click on to go to the next step.
Associate the Reference Root Directory with the Handled root directory:
Once done, you can click on to have view the result of the analysis.
The analysis report can be downloaded as well via the 
button.
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