Wiktionary
a. (context cryptography English) Being a cipher that incorporates the plaintext into the key.
Wikipedia
AutoKey is a text expansion/replacement utility for Linux and X11. It is heavily inspired by the commercial Windows software 'PhraseExpress'. It receives keyboard events using one of several methods and uses X events to drive the expansions. AutoKey can be used to replace abbreviations with full phrases, and also to correct spelling mistakes and other typographical errors. AutoKey is known to operate under both the GNOME and KDE desktop environments.
Usage examples of "autokey".
Other polyalphabetics, such as the autokey and the two-tape system, engender specialized solutions that stem from their own peculiarities.
The perfect randomness of the one-time system nullifies any horizontal, or lengthwise, cohesion, as in coherent running key or autokey, and its one-time nature bars any vertical assembly in Kasiski or Kerckhoffs columns, as in keys repeated in a single message or among several messages.