Nonce Meaning: Definition, Examples, and Translations
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nonce
[nɑns ]
Definitions
cryptography
A nonce is an arbitrary number used only once in a cryptographic communication protocol to ensure that old communications cannot be reused in replay attacks. It is typically a random or pseudo-random number that is generated for a specific use within a single session or transaction.
Synonyms
random number, session token, unique identifier.
Examples of usage
- The system generated a unique nonce for each transaction.
- To prevent replay attacks, each request must include a fresh nonce.
- The nonce was combined with a timestamp to enhance security.
informal
In informal usage, 'nonce' can refer to a short-lived or temporary event, especially in phrases like 'for the nonce', meaning for the time being or temporarily.
Synonyms
Examples of usage
- We'll use this solution for the nonce.
- She agreed to stay for the nonce.
- The arrangement is only for the nonce.
Translations
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Origin of 'nonce'
The term 'nonce' has its roots in Middle English as derived from the phrase 'for the nonce', which means 'for the once' or 'for the one occasion'. This usage dates back to the 14th century and was primarily used to refer to a temporary purpose or a specific occasion. In the context of cryptography, the adaptation of the term emerged in the 20th century, relating to the need for unique values in secure communication protocols. The modern cryptographic meaning emphasizes the importance of each nonce being used only once, which plays a crucial role in maintaining security and preventing replay attacks. Over time, the term has found its way into various technical discussions, especially those involving security measures in computer systems.