diff --git a/src/share/classes/java/security/cert/X509CRLSelector.java b/src/share/classes/java/security/cert/X509CRLSelector.java
index 0580ee36bf280ffa5b936900b1c6d44e3a5847f5..face5ff525d98d6f282adc57c808f94afef19c41 100644
--- a/src/share/classes/java/security/cert/X509CRLSelector.java
+++ b/src/share/classes/java/security/cert/X509CRLSelector.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -679,10 +679,14 @@ public class X509CRLSelector implements CRLSelector {
                 nowPlusSkew = new Date(dateAndTime.getTime() + skew);
                 nowMinusSkew = new Date(dateAndTime.getTime() - skew);
             }
+
+            // Check that the test date is within the validity interval:
+            //   [ thisUpdate - MAX_CLOCK_SKEW,
+            //     nextUpdate + MAX_CLOCK_SKEW ]
             if (nowMinusSkew.after(nextUpdate)
                 || nowPlusSkew.before(crlThisUpdate)) {
                 if (debug != null) {
-                    debug.println("X509CRLSelector.match: update out of range");
+                    debug.println("X509CRLSelector.match: update out-of-range");
                 }
                 return false;
             }
diff --git a/src/share/classes/sun/security/provider/certpath/OCSPResponse.java b/src/share/classes/sun/security/provider/certpath/OCSPResponse.java
index 8075d73fd818c0a1195b06b913bc2bff32f9f11e..47755e7fb67399a17a798b2684c82c16f4f88c6d 100644
--- a/src/share/classes/sun/security/provider/certpath/OCSPResponse.java
+++ b/src/share/classes/sun/security/provider/certpath/OCSPResponse.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -151,8 +151,8 @@ public final class OCSPResponse {
     private static final int DEFAULT_MAX_CLOCK_SKEW = 900000;
 
     /**
-     * Integer value indicating the maximum allowable clock skew, in seconds,
-     * to be used for the OCSP check.
+     * Integer value indicating the maximum allowable clock skew,
+     * in milliseconds, to be used for the OCSP check.
      */
     private static final int MAX_CLOCK_SKEW = initializeClockSkew();
 
@@ -586,13 +586,14 @@ public final class OCSPResponse {
                 "Unable to verify OCSP Response's signature");
         }
 
-        // Check freshness of OCSPResponse
         if (nonce != null) {
             if (responseNonce != null && !Arrays.equals(nonce, responseNonce)) {
                 throw new CertPathValidatorException("Nonces don't match");
             }
         }
 
+        // Check freshness of OCSPResponse
+
         long now = (date == null) ? System.currentTimeMillis() : date.getTime();
         Date nowPlusSkew = new Date(now + MAX_CLOCK_SKEW);
         Date nowMinusSkew = new Date(now - MAX_CLOCK_SKEW);
@@ -602,13 +603,18 @@ public final class OCSPResponse {
                 if (sr.nextUpdate != null) {
                     until = " until " + sr.nextUpdate;
                 }
-                debug.println("Response's validity interval is from " +
+                debug.println("OCSP response validity interval is from " +
                               sr.thisUpdate + until);
+                debug.println("Checking validity of OCSP response on: " +
+                    new Date(now));
             }
 
-            // Check that the test date is within the validity interval
-            if ((sr.thisUpdate != null && nowPlusSkew.before(sr.thisUpdate)) ||
-                (sr.nextUpdate != null && nowMinusSkew.after(sr.nextUpdate)))
+            // Check that the test date is within the validity interval:
+            //   [ thisUpdate - MAX_CLOCK_SKEW,
+            //     MAX(thisUpdate, nextUpdate) + MAX_CLOCK_SKEW ]
+            if (nowPlusSkew.before(sr.thisUpdate) ||
+                nowMinusSkew.after(
+                    sr.nextUpdate != null ? sr.nextUpdate : sr.thisUpdate))
             {
                 throw new CertPathValidatorException(
                                       "Response is unreliable: its validity " +