CUSIP No. 45323j103 13G

EXHIBIT 1

JOINT FILING AGREEMENT

Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, the undersigned hereby agree that only one statement containing the information required by Schedule 13G need be filed with respect to the ownership by each of the undersigned of shares of Imprivata, Inc.

EXECUTED this 12th day of February, 2015

GENERAL CATALYST GROUP II, L.P.
By:	GENERAL CATALYST PARTNERS II, L.P. its General Partner
	By:	GENERAL CATALYST GP II, LLC its General Partner
		By:	*
			William J. Fitzgerald
			Member, COO and CFO
GC ENTREPRENEURS FUND II, L.P.
By:	GENERAL CATALYST PARTNERS II, L.P. its General Partner
	By:	GENERAL CATALYST GP II, LLC its General Partner
		By:	*
			William J. Fitzgerald
			Member, COO and CFO
GENERAL CATALYST PARTNERS II, L.P.
By:	GENERAL CATALYST GP II, LLC its General Partner
		By:	*
			William J. Fitzgerald
			Member, COO and CFO

CUSIP No. 45323j103 13G

GENERAL CATALYST GP II, LLC
By:	*
	William J. Fitzgerald
	Member, COO and CFO
By:	*
	Joel E. Cutler
By:	*
	David P. Fialkow
By:	*
	David J. Orfao

*By:	/s/ Christopher McCain
	Christopher McCain
	As attorney-in-fact

This Agreement was executed by Christopher McCain on behalf of the individuals listed above pursuant to a Power of Attorney, a copy of which is attached as Exhibit 3.