Azure Synapse Safety: Static Knowledge Masking


Knowledge safety is a sizzling matter given the information breach we hear about it day-after-day. Although there are numerous specialised instruments accessible out there, a number of questions come up relating to their accessibility, Sharing, and knowledge transfers inside the group. Largely in a company there is perhaps have to refresh(copy) manufacturing delicate knowledge to a number of nonproduction environments like staging, UAT, check and so forth in order that different groups like software, testing or QA groups can work on them. Think about you will have a desk with delicate data and that will likely be completely transferred routinely to different environments because it resides below your manufacturing database and be made accessible for customers in any respect ranges together with those that you don’t want to be seen.

Static Knowledge Masking

One of the vital used technique in such eventualities is the Static knowledge masking which has been supplied inside synapse analytics that can prohibit the publicity of delicate knowledge completely to its finish customers. It makes use of a masking approach that can change the delicate knowledge by altering knowledge at relaxation.

I’ve created a pattern desk with handle fields which we’re going to work on. At present the pattern knowledge is loaded into the lake database and appears like under.

Static Data Masking

Static Knowledge Masking Dynamic Knowledge Masking
Works on a duplicate of desk Works on the unique database desk
Can not entry the unique knowledge Unique knowledge intact
Masking occurs on the storage degree Masking occurs on-the-fly after you execute the question
All customers have entry to the identical kind of masked knowledge Varies primarily based on degree of permission the consumer has been granted with


I’ve a database with a pattern desk which I’m going to make use of for this demo. You shouldn’t carry out masking to the supply or golden copy of your knowledge, or you’ll be susceptible to dropping it, as SDM completely alters the information to carry out the masking. I’ll masks the four location columns from supply desk when copying to the newly created vacation spot desk.

Go to synapse studio and create a brand new pipeline.

Static Data Masking

From transfer and rework choose Knowledge stream activity and drag it to the canvas. Now click on on edit button to open the subsequent canvas the place you’ll have to create Three steps specifically the supply, derived column after which the vacation spot sink.

Static Data Masking

Now creating the supply and sink to pick out your supply and vacation spot tables. Each steps 1 and a couple of are equivalent and really straightforward to create, therefore skipping this half.

Static Data Masking

Step quantity 3, creating the derived column by mapping all of the columns to their respective vacation spot columns. Now get into the expression builder and select the columns that you simply need to be masked and embody them with sha2(256, columnname) expression. Right here we use the conventional SHA256 hash perform algorithm for encrypting the information current within the columns.

Static Data Masking

Static Data Masking

Under are the handle columns that I masked when creating the brand new desk.

Static Data Masking

As soon as accomplished now set off the pipeline to get it accomplished efficiently.

Static Data Masking

With the pipeline full now we should examine each the tables to see the distinction how the masking knowledge is saved.

Word: I’ve used the SSMS (SQL Server administration studio) since I may cowl many of the masked columns intimately from this than from the synapse pocket book. You may proceed with the identical synapse pocket book to confirm and full this.

Masked desk: Created utilizing the supply desk

Static Data Masking

Supply desk Unmasked

Static Data Masking


That is the fundamental sensible implementation of static knowledge masking characteristic within the azure synapse. This characteristic is widespread for all of the Microsoft knowledge merchandise equivalent to SQL Server, Azure SQL, Azure SQL managed occasion and Azure synapse analytics. Hope the dwell demo would come helpful in case you need to implement such strategies in addition to to your understanding.

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