The recent long letter by Sawraj Singh, which took up a lot of print space, accusing BJP of voting fraud in the UP elections by rigging the electronic voting machines (EVMs), was unconvincing. The losing parties, all well known for tremendous corruption, are now accusing the BJP of corruption without offering any evidence.
Rahul Gandhi goes around the world bad mouthing Prime Minister Modi without any sound basis for his statements. These are the tactics of losers.
Singh recommends going back to the ballot paper for voting. Can he guarantee that the ballot paper is totally free of rigging possibilities? No method, as of now, is totally fool-proof. Even NASA machines are not hundred percent flawless.
In conclusion, continue using EVMs, but keep improving them every voting cycle.