olemus
märkide arv krüptovõtme iga võimaliku väärtuse esituseks,
harilikult bittide arvuna
=
the number of bits in a cryptographic algorithm's key

ülevaateid
https://www.techopedia.com/definition/3999/key-length

https://en.wikipedia.org/wiki/Key_size

http://www.keylength.com/en/8/

https://www.keylength.com/en/4/

https://www.javamex.com/tutorials/cryptography/rsa_key_length.shtml

https://infoscience.epfl.ch/record/164539/files/NPDF-32.pdf

https://eprint.iacr.org/2021/894.pdf

https://blkcipher.pl/assets/pdfs/NPDF-32.pdf