The stand of the commission before the parliamentary panel comes a day before it is to announce its 'EVM challenge' at a press conference here.
Senior officials of the Commission, who appeared before the parliamentary standing committee on Law and Personnel, said the EVMs are tamper-proof and very reliable.
The commission was represented by Deputy Election Commissioners Umesh Sinha and Vijay Dev, besides other officials.
The Parliamentary Standing Committee on Personnel and Law, headed by Congress leader Anand Sharma, had today summoned the Election Commission officials and the Legislative Secretary of the Law Ministry over the issue of electoral reforms.
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After several opposition parties urged the EC to revert to ballot paper system, the parliamentary committee had summoned senior officials of the poll panel to discuss issues related to the reliability of EVMs.
The EC has also thrown a challenge to political parties to prove that the EVMs used in the recent assembly polls were tampered with after several opposition parties questioned their reliability and demanded going back to the paper ballot system.
Amid concerns raised by the opposition, the Union Cabinet had last month cleared the Election Commission's proposal to buy VVPAT machines for the EVMs to ensure transparency in the voting process.
The proposal involves getting 16,15,000 VVPAT units for EVMs at a cost of around Rs 3,173.47 crore for use in the 2019 Lok Sabha polls.