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6 votes
3 answers
9k views

Can Quantum Computers crack RSA and AES?

Im trying to learn more about cryptography and ran into a post, Is AES-128 quantum safe?, which asks if AES-128 is safe. From the articles and replies it seems that AES-128 (symmetric key) is safe ...
cryptoman534345's user avatar
17 votes
0 answers
426 views

Fewest qubits required for the discrete logarithm problem and integer factorization

According to a paper from 2002, the most efficient circuit to factor an $n$-bit integer requires $2n+3$ qubits and $O(n^{3}\lg(n))$ elementary quantum gates, assuming ideal qubits. Later on, according ...
forest's user avatar
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15 votes
3 answers
7k views

Can or can not D-Wave's quantum computers use Shor's and Grover's Algorithm to find encryption keys? Why?

I read that a company called D-Wave Systems has and is manufacturing quantum computers of 128 qubits. Can they or can they not use Shor's and Grover's algorithms for finding RSA-keys? If they can't ...
user128226's user avatar