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This tag refers to public-key algorithms based on problems that quantum computers can't solve efficiently. Existing algorithms such as RSA, Diffie-Hellman, and ECDSA are known to be breakable using Shor's algorithm on quantum computers. Symmetric-key algorithms generally don't fall under this category.

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Quantum attack on CTR

I'm reading the article named "Characterizing the qIND-qCPA (in)security of the CBC, CFB, OFB and CTR modes of operation". An attack on CTR mode is presented in the article. The proof of thm 1 states: …
Georgii Firsov's user avatar