split key

/S P L IH1 T K IY0/
noun
  1. 1

    (computing) A key value used to identify where to split the children of a parent node in a B-tree or similar data structure.

  2. 2

    (cryptography) A cryptographic key that is divided into two or more values that individually cannot be used to deduce the entire key.

  3. 3

    (engineering) A key split at one end like a split pin, for the same purpose.