POWER OF ATTORNEY
For Executing Forms 3, 4 and 5


	Know all by
these presents, that the undersigned hereby constitutes and appoints each
of Margaret K. Seif, Kathryn L. Leach, Christopher R. Dollase and Hal J.
Leibowitz signing singly, his or her true and lawful attorney-in-fact to:

	(1)	execute on behalf of the undersigned Forms 3, 4 and 5 in accordance
with Section 16(a) of the Securities Exchange Act of 1934, as amended, and
the rules thereunder;
	(2)	perform all acts on behalf of the undersigned
that may be necessary or desirable to complete the execution of any such
Forms 3, 4 and 5 and the timely filing of such forms with the United States
Securities and Exchange Commission and any other authority; and
	(3)	take
any other action of any type whatsoever in connection with the foregoing
that, in the opinion of such attorney-in-fact, may be of benefit to, in the
best interest of, or legally required by, the undersigned, it being
understood that the documents executed by such attorney-in-fact on behalf
of the undersigned pursuant to this Power of Attorney shall be in such form
and shall contain such terms and conditions as such attorney-in-fact may
approve in his or her discretion.
	The undersigned hereby grants to each
such attorney-in-fact full power and authority to perform every act and
thing whatsoever requisite, necessary and proper to be done in the exercise
of any of the rights and powers herein granted, as fully to all intents and
purposes as the undersigned might or could do if personally present, with
full power of substitution or revocation, hereby ratifying and confirming
all that such attorney-in-fact, or his or her substitute or substitutes,
shall lawfully do or cause to be done by virtue of this power of attorney
and the rights and powers herein granted.  The undersigned acknowledges
that the foregoing attorneys?in?fact, in serving in such capacity at the
request of the undersigned, are not assuming any of the undersigned's
responsibilities to comply with Section 16 of the Securities Exchange Act
of 1934, as amended.
	IN WITNESS WHEREOF, the undersigned has caused this
Power of Attorney to be executed as of this 25th day of August, 2003.




						/s/Jeffrey D. Glidden
						----------------------

						Jeffrey D. Glidden