Quantum risk, in plain English.
A practical glossary for quantum computing, cyber readiness and insurance conversations.
Post-quantum cryptography (PQC)
Cryptographic algorithms designed to resist known attacks from both classical and quantum computers. They can run on ordinary computers.
Quantum risk
In this site, potential consequences of quantum computing for information security, business operations and insurance. Not every risk is equally exposed.
Harvest now, decrypt later
The possibility that an adversary captures encrypted information now and attempts to decrypt it using a future capability.
Cryptographic inventory
A record of where cryptography is used, its purpose, dependencies, ownership and relevant upgrade paths.
Cryptographic agility
The ability to change cryptographic algorithms and related technology with manageable disruption.
Public-key cryptography
Methods using mathematically related public and private keys for functions such as key establishment and digital signatures. Different algorithm families have different risks.
Digital signature
A cryptographic mechanism used to help verify the origin and integrity of information. It is distinct from simply displaying a signature image.
Quantum key distribution (QKD)
A technique using quantum physical properties to distribute key material. It is different from post-quantum cryptography and has distinct infrastructure requirements.
Cryptographically relevant quantum computer
A quantum computer capable of carrying out attacks that meaningfully threaten deployed cryptographic systems. Its arrival date is uncertain.
Claims-made coverage
Coverage whose response may depend on a claim first being made, and sometimes reported, within specified periods. Exact wording controls.
Retroactive date
A date used in some policies to limit covered acts or incidents. How it applies depends on the wording.
Dependent business interruption
A term often used for losses connected to interruption at certain outside providers. Scope and triggers vary by policy.
Systemic cyber risk
The possibility that one event or shared dependency produces losses across many organizations at once.
Quantum advantage
An advantage on a defined task relative to specified classical approaches. A result on one benchmark does not prove a broad commercial advantage.
Explore the sourced guides for context and technical references.