MUMBAI, India, April 20 -- Intellectual Property India has published a patent application (202421078645 A) filed by Tata Consultancy Services Limited, Maharashtra, on Oct. 16, 2024, for 'method and system for securing personal identifiable information (pii) in blockchain.'

Inventor(s) include Jeremiah, Namitha; Seshadri, Ashok; and Bhattacharjee, Saptarshee.

The application for the patent was published on April 17, under issue no. 16/2026.

According to the abstract released by the Intellectual Property India: "Current approaches allow storage of Personal Identifiable Information (PII) data on blockchain, however the user will not be allowed to delete any data from blockchain because of data immutability. As a result, even if the user doesn't want the data to remain on the blockchain platform, there is no option to delete it. Method and system disclosed herein provides an approach, in which PII data is stored in a ledger by encrypting it using a salt and key. When the user doesn't want the data to be stored in the blockchain ledger, the system deletes, upon receiving a PII data deletion request from the user, the key and the salt stored in the off-chain system, wherein the deletion of the key and the salt ensures permanent inaccessibility of PII data from the secondary blockchain ledger."

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