First, the math: RSA works by multiplying two large primes—easy to do, but reversing it without the key is like finding a particular grain of sand on Digha beach. A quantum computer, using Shor’s algorithm, could factor that number quickly, crumbling the encryption. That’s why my ministry is pushing for post-quantum cryptography standards. You see, I think of my father’s ration shop ledger, how simple ink and paper kept accounts safe for decades; sometimes the old, unbreakable trust in a handshake feels more secure than any system the future might shatter.
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