Quantum computing will change the encryption game, but it is not yet clear how much it will change. It's not clear because we are not yet certain what sorts of problems quantum computers can solve. As mentioned, RSA is dramatically weakened by quantum computing because the factoring of primes can be done in polynomial time using Shor's Algorithm.

Oct 13, 2017 · And if it took a classical computer one year to crack 64-bit encryption, it would take a quantum computer 7.3 milliseconds. Therefore, to counteract this quantum speed-up, larger key sizes must be IBM’s Arvind Krishna says, “quantum computers will crack today’s encryption within a decade.” Krishna has been following the implications of quantum computing on cryptography very closely. He’s the senior vice president of IBM’s Cloud and Cognitive Software division, and he leads their research and development of quantum computing Google accidentally made computer science history last week. In recent years the company has been part of an intensifying competition with rivals such as IBM and Intel to develop quantum computers Jan 02, 2014 · A working quantum computer would open the door to easily breaking the strongest encryption tools in use today, including a standard known as RSA, named for the initials of its creators. The McEliece Encryption System has a security reduction to the Syndrome Decoding Problem (SDP). The SDP is known to be NP-hard The Post Quantum Cryptography Study Group sponsored by the European Commission has recommended the use of this cryptography for long term protection against attack by a quantum computer. Quantum computing doesn't crack passwords; it cracks encryption. The problem with the currently popular [encryption] algorithms is that their security relies on one of three hard mathematical problems: the integer factorization problem, the discrete logarithm problem or the elliptic-curve discrete logarithm problem.

## Within the next 20 years, quantum computing could be applied to easily crack current approaches to cryptography, according to the National Institute of Standards and Technology, which already is

Sep 30, 2019 · We know that a quantum computer using Shor’s algorithm will require several thousand qubits (the fundamental quantum computing unit representing either 1 or 0) to break RSA or ECC. But that doesn’t How are Quantum Computers Relevant to IT Security? Many important aspects of IT security rely on encryption and public key cryptography, which are essential for e-commerce and protecting secret electronic information. These techniques are based in turn on mathematical algorithms that are very difficult to “break”.

### Quantum computers strong enough to crack today’s encryption are at least a decade away, but the market for quantum-safe applications is already developing.

The best-known and developed application of quantum cryptography is quantum key distribution (QKD), which is the process of using quantum communication to establish a shared key between two parties (Alice and Bob, for example) without a third party (Eve) learning anything about that key, even if Eve can eavesdrop on all communication between Alice and Bob. Oct 08, 2019 · Once quantum computers become functional, experts warn, they could perform calculations exponentially faster than classical computers—potentially enabling them to destroy the encryption that Oct 24, 2018 · Public key cryptography is considered one of the most vulnerable to cracking by a quantum computer, which is part of what's making folks with large Bitcoin investments sweat. What this means to you