# nothing-up-my-sleeve number

> English word · Noun

## Definitions
1. A number which, by its construction, is above suspicion of having hidden properties; used in creating cryptographic functions such as hashes and ciphers.

## Etymology
In reference to magic tricks in which the performer may have something concealed in a sleeve (or may demonstrate to the audience that they do not).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/nothing-up-my-sleeve-number