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Wiktionary
subkey

n. 1 (context cryptography English) A partial key. 2 (cx computing Microsoft Windows English) A key located beneath another key in the registry.

Wikipedia
Subkey

Subkey can refer to:

  • A hard-coded parameter in a key schedule
  • A key in OpenPGP that is bound by a master key

Usage examples of "subkey".

These subkeys provide finer details and a greater range to the possible configuration information for a particular operating system.

This key has a software and system subkeys, which keep track of configuration information.