KOLKATA: Month-old Divit Biyani has become the first in the state to get a birth certificate, secured through blockchain.Divit's father Varun, who owns a start-up company, Super Procure, received the hi-tech certificate on Tuesday. Issued by the New Town Kolkata Development Authority (NKDA), the birth certificate was showcased at the two-day global blockchain congress in the city. "I'm glad the government is implementing new technology like this to secure information and prevent manual manipulation," said Varun.Blockchain is an incorruptible digital ledger that is tamper-proof. A virtual block representing the information, in this case the person's date of birth, is created and stored in the decentralised ledger.Explaining the difference between a normal birth certificate and one based on blockchain, state IT&E additional chief secretary and NKDA chairman Debashis Sen said the blockchain-based certificate had an added level of security and was immune to cyber-attacks due to multi-level encryption.