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NIST SP 800-57 Part 1 Rev. 5:
a cryptographic key that is generated for each execution of a cryptographic process (e.g., key establishment) and that meets other requirements of the key type (e.g., unique to each message or session)

ülevaateid
https://en.wikipedia.org/wiki/Ephemeral_key

https://zenodo.org/record/2572705/files/bc_globecom.PDF

https://cacr.uwaterloo.ca/techreports/2008/cacr2008-24.pdf

vt ka
- efemeervõtmega DH