olemus
side turbe meetod, mis põhineb
avaliku võtmega krüptograafial ja digitaalsignatuuril
=
a two-stage process including public-key encryption and a digital signature

ülevaateid
https://cpb-us-e1.wpmucdn.com/sites.psu.edu/dist/3/46465/files/2016/04/Technical-Definition.pdf

https://datacadamia.com/security/key/epke