出願: an application (a verbal or written request)

出願: to apply, to make or file an application

提出: submission

発出: bring/send forth, issue

出エジプト記: the Exodus (book of Torah and Old Testament)

key (tool for opening or locking something) / key; clue (important fact for solving something) / lock

(computing) key / (music) key

(cryptography) secret key

keyhole

(cryptography) key exchange - an exchange of peers' keys at initialization phase of connection.