computer science

ID Quantique

ID Quantique is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand ID Quantique rather than just read about it. In short: ID Quantique (IDQ) is a Swiss company that provides quantum key distribution (QKD) systems, quantum safe network encryption, single photon counters, and hardware random number generators. Headquartered in Geneva, Switzerland, IDQ was founded in 2001 as a spin-off of the Group of Applied Physics at the University of Geneva. the firm is structured in three business units: The quantum safe cryptography division The pho…

Key takeaways

ID Quantique belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect ID Quantique to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of ID Quantique from memory before moving on to harder problems.

Reference excerpt

ID Quantique (IDQ) is a Swiss company that provides quantum key distribution (QKD) systems, quantum safe network encryption, single photon counters, and hardware random number generators. Headquartered in Geneva, Switzerland, IDQ was founded in 2001 as a spin-off of the Group of Applied Physics at the University of Geneva. the firm is structured in three business units:

The quantum safe cryptography division The photon counting division The quantum random number generation division In 2025, IonQ announced that it had completed its acquisition of a controlling stake in ID Quantique.

Divisions

Quantum Safe Cryptography Division The Quantum Safe Cryptography division focuses on data protection and provides:

quantum-safe network encryption quantum key distribution quantum key generation and key management

Photon Counting Division The Photon Counting division works on optical instrumentation products such as:

photon counters in the visible and infrared spectrum photon pair sources quantum key distribution for R&D applications

Random Number Generation The company's work in Random Number Generation focuses on developing hardware random number generators based on quantum randomness, for cryptographic and security applications (quantum key generation) and research purposes (MonteCarlo simulations).

ID Quantique Achievements The company has realized several world premieres in quantum technology innovation.

In 2004, ID Quantique was one of the first in the world to bring a quantum key distribution system to a commercial market. (MagiQ Technologies, Inc. announced the availability of its quantum key distribution system in 2003.) In 2007 quantum cryptography was deployed by a government for the first time ever to protect the Geneva state elections in Switzerland. It is still in deployment. In 2010 the company deployed QKD over multiplexed networks with 1 Gbit/s of data, and in 2011 the company ran its QKD systems for over 18 months in the Swissquantum network in cooperation with the University of Geneva. In 2014, principles from IDQ together with the University of Geneva, broke the world record for the longest distance key exchange by QKD – 307 km. In 2014 IDQ's Quantis true random number generator became the first QRNG to pass the German BSI's AIS31 randomness validation. In 2014 ID Quantique and Battelle co-founded the Quantum-Safe Security Working Group in the Cloud Security Alliance (CSA). The group aims to help governments and industry understand quantum‐safe methods for protecting their networks and their data, following the call by the European telecommunications Institute (ETSI) for quantum safe cryptography in their 2014 white paper "Quantum Safe Cryptography and Security". ID Quantique also announced their Quantum Random Number Generator (QRNG) chip has been integrated in the 'Vsmart Aris 5G' smartphone made by VinSmart, a member of Vingroup from Vietnam.

See also Quantum key distribution Quantum cryptography Hardware random number generator

Notes

Illustrations

Worked examples

Example 1 — a first encounter with ID Quantique

Start with the simplest possible case. Write down what ID Quantique claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to ID Quantique before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about ID Quantique ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of ID Quantique

In research: ID Quantique appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses ID Quantique in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: ID Quantique is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2025 mergers and acquisitions, Companies based in Geneva, Cryptography companies, so understanding it makes those chapters shorter.
In everyday life: Look for ID Quantique outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study ID Quantique in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what ID Quantique means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain ID Quantique out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is ID Quantique in simple terms?

Why does ID Quantique matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study ID Quantique?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on ID Quantique.