===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/ssh/sshd_config.5,v
retrieving revision 1.184
retrieving revision 1.185
diff -u -r1.184 -r1.185
--- src/usr.bin/ssh/sshd_config.5	2014/12/21 23:35:14	1.184
+++ src/usr.bin/ssh/sshd_config.5	2014/12/22 07:51:30	1.185
@@ -33,8 +33,8 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.\" $OpenBSD: sshd_config.5,v 1.184 2014/12/21 23:35:14 jmc Exp $
-.Dd $Mdocdate: December 21 2014 $
+.\" $OpenBSD: sshd_config.5,v 1.185 2014/12/22 07:51:30 djm Exp $
+.Dd $Mdocdate: December 22 2014 $
 .Dt SSHD_CONFIG 5
 .Os
 .Sh NAME
@@ -209,6 +209,18 @@
 would restrict keyboard interactive authentication to the
 .Dq bsdauth
 device.
+.Pp
+If the
+.Dq publickey
+method is listed more than one,
+.Xr sshd 8
+verifies that keys that have been used successfully are not reused for
+subsequent authentications.
+For example, an
+.Cm AuthenticationMethods
+of
+.Dq publickey,publickey
+will require successful authentication using two different public keys.
 .Pp
 This option is only available for SSH protocol 2 and will yield a fatal
 error if enabled if protocol 1 is also enabled.