Social __ Number, Ssn; Nine-Digit Code for Workers

This page is the CodyCross answer for the clue below from The Netherlands, Group 2118, Puzzle 4 (Wadden Sea Tides).

Question is: Social __ Number, Ssn; Nine-Digit Code for Workers

and the answer is: SECURITY

Word Meaning:

SECURITY — (uncountable) The condition of not being threatened, especially physically, psychologically, emotionally, or financially.

Definitions from Wiktionary.

Social __ Number, SSN; nine-digit code for workers — CodyCross Answer | CodyCross Solutions