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Crypto­gra­phy

Current encryp­tion methods securing most of today’s Inter­net traffic rely on the assumed hardness of mathe­ma­ti­cal problems such as facto­ring large integers. Progress in algorithms or the advent of powerful quantum compu­ters could eventually allow adver­s­a­ries to decrypt stored encrypted data. Quantum crypto­gra­phy instead uses princi­ples of quantum mecha­nics to secure commu­ni­ca­tion. Its core techni­que is quantum key distri­bu­tion (QKD), in which two parties create a shared secret key by trans­mit­ting fragile quantum states, typically single photons. Any eaves­drop­ping attempt unavo­id­a­bly disturbs these states and is revea­led by statis­ti­cal tests, making QKD a candi­date for long term protec­tion of highly sensi­tive infor­ma­tion. Quantum crypto­gra­phy is relevant for future proofing sensi­tive data, although today it is mainly deployed in niche, high value network links due to cost and distance limits.

Topics in the Subfield Crypto­gra­phy

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Post quantum crypto­gra­phy (classi­cal quantum safe cryptography)

While quantum crypto­gra­phy provi­des security based on the laws of physics, most systems conti­nue to rely on…

More selected Quantum Compu­ting Software:

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Software for quantum compu­ting hardware

Software for quantum compu­ting hardware forms the layer between high level algorithms and physi­cal qubits. At the top of the stack…

Quantum Simula­tion of Quantum Systems

The quantum simula­tion of quantum systems focuses on the modeling of inter­ac­ting quantum mecha­ni­cal partic­les, where classi­cal methods, due to…

Quantum machine learning

Quantum machine learning (QML) explo­res how quantum compu­ters can enhance or extend data driven models. Classi­cal machine learning repres­ents data as sequen­ces of bits and…

Quantum Optimiza­tion

Quantum optimiza­tion explo­res how quantum compu­ters can be used to solve complex optimiza­tion problems more effici­ently. Classi­cal optimiza­tion often formu­la­tes such problems as…

Quantum error correction

Quantum Error Correc­tion (QEC) provi­des the archi­tec­tu­ral founda­tion for relia­ble quantum compu­ting, as it addres­ses the…

Quantum software engineering

Quantum Service Enginee­ring refers to the appli­ca­tion of service orien­ted enginee­ring princi­ples, methods, and tools to the design, imple­men­ta­tion, and delivery of quantum compu­ting capabi­li­ties as…

Founda­ti­ons

Quantum theory raises concep­tual and mathe­ma­ti­cal questi­ons, including…

Uncon­ven­tio­nal quantum compu­ting paradigms

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