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Posts Tagged ‘Post-Quantum Cryptography’

Will advances in quantum computing affect internet security?

Posted by hkarner - 30. September 2019

Date: 29-09-2019
Source: The Guardian by John Naughton

Google has built a super-fast computer, but whether it can break the encryption we take for granted is moot

IBM’s new 53-qubit quantum computer: how much of a security threat does the new technology pose?

Something intriguing happened last week. A paper about quantum computing by a Google researcher making a startling claim appeared on a Nasa website – and then disappeared shortly afterwards. Conspiracy theorists immediately suspected that something sinister involving the National Security Agency was afoot. Spiritualists thought that it confirmed what they’ve always suspected about quantum phenomena. (It was, as one wag put it to me, a clear case of “Schrödinger’s Paper”.) Adherents of the cock-up theory of history (this columnist included) concluded that someone had just pushed the “publish” button prematurely, a suspicion apparently confirmed later by stories that the paper was intended for a major scientific journal before being published on the web.

Why was the elusive paper’s claim startling? It was because – according to the Financial Times – it asserted that a quantum computer built by Google could perform a calculation “in three minutes and 20 seconds that would take today’s most advanced classical computer … approximately 10,000 years”. As someone once said of the book of Genesis, this would be “important if true”. A more mischievous thought was: how would the researchers check that the quantum machine’s calculation was correct? Den Rest des Beitrags lesen »

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Explainer: What is post-quantum cryptography?

Posted by hkarner - 18. Juli 2019

Date: 17-07-2019
Source: Technology Review by Martin Giles

The race is on to create new ways to protect data and communications from the threat posed by super-powerful quantum computers.

This is the third in a series of explainers on quantum technology. The two others cover quantum computing and quantum communication.

Few of us give much thought to the tiny padlock symbol that appears in our web browsers every time we use an e-commerce site, send and receive emails, or check our bank or credit card accounts. But it’s a signal that the online services are using HTTPS, a web protocol that encrypts the data we send across the internet and the responses we receive. This and other forms of encryption protect all kinds of electronic communications, as well as things like passwords, digital signatures, and health records.

Quantum computers could undermine these cryptographic defenses. The machines aren’t powerful enough to do this today, but they are evolving fast. It’s possible that in a little more than a decade—and perhaps even sooner—these machines could be a threat to widely used cryptography methods. That’s why researchers and security firms are racing to develop new approaches to cryptography that will be able to withstand future quantum attacks mounted by hackers.

How does digital encryption work? Den Rest des Beitrags lesen »

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