Treacherously in a sentence as an adverb

The simple task of exchanging real time messages between two parties with secure keys is treacherously hard to implement.

It could reach treacherously high accuracy scores, by secretly assuming every day is an average day.

Treacherously definitions

adverb

in a disloyal and faithless manner; "he behaved treacherously"; "his wife played him false"

See also: faithlessly traitorously treasonably false