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Nethra RaghupathyNethra Raghupathy 

Mask Salesforce data and pull it via talend

We are fetching Salesforce data through Talend job. Before data leaves salesforce we want it to be masked. 
Is there any way we can call apex class whenever there is a SFDC data change and mask it before sending it through Talend?
Similarly unmask the masked data while consuming in the appplication.