Key may refer to:
- Key (lock), device used to open a lock or door
- Skeleton key or master key, a key altered to bypass wards placed inside a lock
- Key (chart), a guide to colours and symbols used in a data chart, graph, plot or diagram
- Key (cryptography), a piece of information that controls the operation of a cryptography algorithm
- Key (engineering), a type of coupling used to transmit rotation between a shaft and an attached item
- Key (map), a guide to a map's symbology
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Famous quotes containing the word key:
“I cannot tell what I am as much afraid of, as a woman who invariably washes on Monday. It is a kind of key to character; and if her mouth is not puckered and her brow wrinkled, they will be, unless she repents.”
—Jane Grey Swisshelm (1815–1884)
“There are two kinds of timidity—timidity of mind, and timidity of the nerves; physical timidity, and moral timidity. Each is independent of the other. The body may be frightened and quake while the mind remains calm and bold, and vice versë. This is the key to many eccentricities of conduct. When both kinds meet in the same man he will be good for nothing all his life.”
—Honoré De Balzac (1799–1850)
“Now narrow minds can develop as well through persecution as through benevolence; they can assure themselves of their power by tyrannizing cruelly or beneficently over others; they go the way their nature guides them. Add to this the guidance of interest, and you will have the key to most social riddles.”
—Honoré De Balzac (1799–1850)