( = key wrapping key = key transport key)

olemus
ISO/IEC 11770, 19790:
krüptovõti teiste võtmete
krüpteerimiseks või dekrüpteerimiseks

https://csrc.nist.gov/glossary/term/Key_Encryption_Key

ülevaateid
http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.infocenter.dc88886.1600/doc/html/san1362628337079.html

https://www.cryptomathic.com/news-events/blog/classification-of-cryptographic-keys-functions-and-properties

https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-38F.pdf