4 Pics 1 Word Level 1856

Answer:
Cypher
Hint
What is the answer to the 4 Pics 1 Word level with A small lock to be used on suitcases, A crossword puzzle game, Digits written on a paper with ink pen on it, and The close-up pattern of a key?

Hint
What is the answer to the 4 Pics 1 Word level with A small lock to be used on suitcases, A crossword puzzle game, Digits written on a paper with ink pen on it, and The close-up pattern of a key?