This isn’t an in-depth explanation of all cryptography, or how quantum computers work rather, the aim is to provide an accessible understanding of the nature of the quantum threat to existing techniques. For now, in this article, we take a look at why we need alternatives.
In future articles, we’ll be looking at how our optical computing technologycan be used to accelerate key operations in cryptographic schemes based on these lattice methods. The fundamental mathematical problems that secure lattice based cryptography are extremely flexible not only do they enable replacements for vulnerable cryptographic schemes, but they can be used to construct new and useful models of cryptography that allow us to do things that we couldn’t do before. This is easier said than done finding suitable mathematical problems for cryptography is not an easy task even without having to verify that they are also secure against quantum attacks, but there has been some exceptional progress in the field.Īmongst these alternatives is a very promising category of techniques collectively known as lattice-based cryptography. The second approach is to find an alternative mathematical problems or features which are not known to be solvable even with a quantum computer. However, this approach requires dedicated quantum hardware. The first is to fight quantum mechanics with quantum mechanics, creating cryptographic schemes (such as E91) that explicitly use quantum properties, typically entanglement, as a means of securing information. There have been two major avenues of research into a solution to this problem. The culprit, quantum computing, enables the use of new calculation techniques that can easily solve some of the fundamentally difficult mathematical problems on which these cryptographic tools are based. It’s a well-known issue with the infrastructure of the modern internet the cryptographic tools that keep information in transit secure from prying eyes and malicious activity are imminently at risk from an entirely new method of computing. These days, if you do any reading on the subject of information security, you don’t need to look very far to find a discussion of the problem of post-quantum security. Optical Computing for Post-Quantum Cryptography An Introduction
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