= ACCORDIAN

olemus
salajane krüptovõtmete krüpteerimise ja võtmehalduse algoritm, mis kuulub NSA A-komplekti
https://en.wikipedia.org/wiki/NSA_cryptography
https://imlive.s3.amazonaws.com/Federal%20Government/ID20822506928613757077177360024332371498/Attachment_11_-NGLD-M_SRD_v4.0_06172019.pdf