Secretiveness

n.	1.	The quality of being secretive; disposition or tendency to conceal.
	2.	(Phren.) The faculty or propensity which impels to reserve, secrecy, or concealment.

Noun	1.	secretiveness - characterized by a lack of openness (especially about one's actions or purposes) Synonyms: closeness
	2.	secretiveness - the trait of keeping things secret Synonyms: secrecy, silence

closeness, furtiveness, sneakiness, stealthiness, unsociability, unsociableness