termifckiku lujvo

m1=c1 is a cryption key of m3(cryption/cryptography algorithm)

Names of cryptography algorithms fit into m3. It does not distinguish a public key from a secret key if you choose a public-key cryptography. Also even not to distinguish it is a key to encrypt or not.


In notes:

ckiku
x1 is a key fitting/releasing/opening/unlocking lock x2, and having relevant properties x3.