Cryptographic Key (Dictionary Entry)
- David Doret
Contexts | Cryptography, Cybersecurity |
|---|---|
Term | Cryptographic Key |
Alternative Forms | Key |
Definitions | A cryptographic key is a parameter used in conjunction with a cryptographic algorithm that determines its operation in such a way that an entity with knowledge of the key can reproduce, reverse, or verify the operation while an entity without knowledge of the key cannot. |
Related Terms |
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Quotes
A cryptographic key is a parameter used in conjunction with a cryptographic algorithm that determines its operation in such a way that an entity with knowledge of the key can reproduce, reverse, or verify the operation while an entity without knowledge of the key cannot. Examples include a symmetric key used with AES to encrypt plaintext data and decrypt ciphertext data, a private signature key used with a digital signature algorithm to generate a digital signature, or a public signature-verification key used with a digital signature algorithm to verify a digital signature.
Keys are owned and used by entities (e.g., individuals (humans), organizations, devices, or processes) that interact with other entities to conduct business. In the case of non-human owners (e.g., the organization, device, or process), the owner is represented or sponsored by one or more humans. For example, if the owner is an organization, then several humans may be authorized to use the key; the humans may be said to represent the organization when conducting its business. In the case of a device or process, the device or process owns and uses the key, but a human sponsor is responsible for managing the key (e.g., generating or replacing the key when required).
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