The process of obscuring information to make it unreadable without special knowledge, key files, or passwords.
A ciphertext, a cryptogram, an encrypted value. Usually used with the preposition "of" followed by the value that is hidden in it.
Any thing, place, or situation about which nothing is known; an unknown fact or piece of information.
A variable (usually x, y or z) whose value is to be found.
A person of no identity; a nonentity
Not known; unidentified; not well known.