diff --git a/js/ndnProtocol/modules/ndn-js-header.txt b/js/ndnProtocol/modules/ndn-js-header.txt
index 648641c..73af4fb 100644
--- a/js/ndnProtocol/modules/ndn-js-header.txt
+++ b/js/ndnProtocol/modules/ndn-js-header.txt
@@ -6,8 +6,8 @@
  * See COPYING for copyright and distribution information.
  */
 
-var EXPORTED_SYMBOLS = ["Closure", "ContentObject", "DataUtils", "Exclude", "Interest", "MimeTypes", "NDN", 
-      "Name", "Sha256", "XpcomTransport"];
+var EXPORTED_SYMBOLS = ["Closure", "ContentObject", "DataUtils", "Exclude", "ExponentialReExpressClosure",
+    "Interest", "MimeTypes", "NDN", "Name", "Sha256", "XpcomTransport"];
 
 Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
 Components.utils.import("resource://gre/modules/NetUtil.jsm");
diff --git a/js/ndnProtocol/modules/ndn-js.jsm b/js/ndnProtocol/modules/ndn-js.jsm
index a444697..c514c23 100644
--- a/js/ndnProtocol/modules/ndn-js.jsm
+++ b/js/ndnProtocol/modules/ndn-js.jsm
@@ -6,8 +6,8 @@
  * See COPYING for copyright and distribution information.
  */
 
-var EXPORTED_SYMBOLS = ["Closure", "ContentObject", "DataUtils", "Exclude", "Interest", "MimeTypes", "NDN", 
-      "Name", "Sha256", "XpcomTransport"];
+var EXPORTED_SYMBOLS = ["Closure", "ContentObject", "DataUtils", "Exclude", "ExponentialReExpressClosure",
+    "Interest", "MimeTypes", "NDN", "Name", "Sha256", "XpcomTransport"];
 
 Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
 Components.utils.import("resource://gre/modules/NetUtil.jsm");
@@ -47,7 +47,9 @@
 null,null,"RootDigest","Signature","Start","Timestamp","Type","Nonce","Scope","Exclude","Bloom","BloomSeed",null,"AnswerOriginKind","InterestLifetime",null,null,null,null,"Witness","SignatureBits","DigestAlgorithm","BlockSize",null,"FreshnessSeconds","FinalBlockID","PublisherPublicKeyDigest","PublisherCertificateDigest","PublisherIssuerKeyDigest","PublisherIssuerCertificateDigest","ContentObject","WrappedKey","WrappingKeyIdentifier","WrapAlgorithm","KeyAlgorithm","Label","EncryptedKey","EncryptedNonceKey",
 "WrappingKeyName","Action","FaceID","IPProto","Host","Port","MulticastInterface","ForwardingFlags","FaceInstance","ForwardingEntry","MulticastTTL","MinSuffixComponents","MaxSuffixComponents","ChildSelector","RepositoryInfo","Version","RepositoryVersion","GlobalPrefix","LocalName","Policy","Namespace","GlobalPrefixName","PolicyVersion","KeyValueSet","KeyValuePair","IntegerValue","DecimalValue","StringValue","BinaryValue","NameValue","Entry","ACL","ParameterizedName","Prefix","Suffix","Root","ProfileName",
 "Parameters","InfoString",null,"StatusResponse","StatusCode","StatusText","SyncNode","SyncNodeKind","SyncNodeElement","SyncVersion","SyncNodeElements","SyncContentHash","SyncLeafCount","SyncTreeDepth","SyncByteCount","ConfigSlice","ConfigSliceList","ConfigSliceOp"],CCNTime=function(a){this.NANOS_MAX=999877929;"number"==typeof a?this.msec=a:1<LOG&&console.log("UNRECOGNIZED TYPE FOR TIME")};CCNTime.prototype.getJavascriptDate=function(){var a=new Date;a.setTime(this.msec);return a};
-var Name=function Name(b){if("string"==typeof b)3<LOG&&console.log("Content Name String "+b),this.components=Name.createNameArray(b);else if("object"===typeof b){4<LOG&&console.log("Content Name Array "+b);this.components=[];for(var c=0;c<b.length;++c)this.add(b[c])}else null==b?this.components=[]:1<LOG&&console.log("NO CONTENT NAME GIVEN")};Name.prototype.getName=function(){return this.to_uri()};
+var ExponentialReExpressClosure=function(a,b){Closure.call(this);this.callerClosure=a;b=b||{};this.maxInterestLifetime=b.maxInterestLifetime||16E3};
+ExponentialReExpressClosure.prototype.upcall=function(a,b){try{if(a==Closure.UPCALL_INTEREST_TIMED_OUT){var c=b.interest.interestLifetime;if(null==c)return this.callerClosure.upcall(Closure.UPCALL_INTEREST_TIMED_OUT,b);c*=2;if(c>this.maxInterestLifetime)return this.callerClosure.upcall(Closure.UPCALL_INTEREST_TIMED_OUT,b);var d=b.interest.clone();d.interestLifetime=c;b.ndn.expressInterest(d.name,this,d);return Closure.RESULT_OK}return this.callerClosure.upcall(a,b)}catch(e){return console.log("ExponentialReExpressClosure.upcall exception: "+
+e),Closure.RESULT_ERR}};var Name=function Name(b){if("string"==typeof b)3<LOG&&console.log("Content Name String "+b),this.components=Name.createNameArray(b);else if("object"===typeof b){4<LOG&&console.log("Content Name Array "+b);this.components=[];for(var c=0;c<b.length;++c)this.add(b[c])}else null==b?this.components=[]:1<LOG&&console.log("NO CONTENT NAME GIVEN")};Name.prototype.getName=function(){return this.to_uri()};
 Name.createNameArray=function(a){a=a.trim();if(0>=a.length)return[];var b=a.indexOf(":");if(0<=b){var c=a.indexOf("/");if(0>c||b<c)a=a.substr(b+1,a.length-b-1).trim()}if("/"==a[0])if(2<=a.length&&"/"==a[1]){b=a.indexOf("/",2);if(0>b)return[];a=a.substr(b+1,a.length-b-1).trim()}else a=a.substr(1,a.length-1).trim();a=a.split("/");for(b=0;b<a.length;++b)c=Name.fromEscapedString(a[b]),null==c?(a.splice(b,1),--b):a[b]=c;return a};
 Name.prototype.from_ccnb=function(a){a.readStartElement(this.getElementLabel());for(this.components=[];a.peekStartElement(CCNProtocolDTags.Component);)this.add(a.readBinaryElement(CCNProtocolDTags.Component));a.readEndElement()};Name.prototype.to_ccnb=function(a){if(null==this.components)throw Error("CANNOT ENCODE EMPTY CONTENT NAME");a.writeStartElement(this.getElementLabel());for(var b=this.components.length,c=0;c<b;c++)a.writeElement(CCNProtocolDTags.Component,this.components[c]);a.writeEndElement()};
 Name.prototype.getElementLabel=function(){return CCNProtocolDTags.Name};
@@ -88,7 +90,8 @@
 a.peekStartElement(CCNProtocolDTags.InterestLifetime)&&(this.interestLifetime=1E3*DataUtils.bigEndianToUnsignedInt(a.readBinaryElement(CCNProtocolDTags.InterestLifetime))/4096);a.peekStartElement(CCNProtocolDTags.Nonce)&&(this.nonce=a.readBinaryElement(CCNProtocolDTags.Nonce));a.readEndElement()};
 Interest.prototype.to_ccnb=function(a){a.writeStartElement(CCNProtocolDTags.Interest);this.name.to_ccnb(a);null!=this.minSuffixComponents&&a.writeElement(CCNProtocolDTags.MinSuffixComponents,this.minSuffixComponents);null!=this.maxSuffixComponents&&a.writeElement(CCNProtocolDTags.MaxSuffixComponents,this.maxSuffixComponents);null!=this.publisherPublicKeyDigest&&this.publisherPublicKeyDigest.to_ccnb(a);null!=this.exclude&&this.exclude.to_ccnb(a);null!=this.childSelector&&a.writeElement(CCNProtocolDTags.ChildSelector,
 this.childSelector);this.DEFAULT_ANSWER_ORIGIN_KIND!=this.answerOriginKind&&null!=this.answerOriginKind&&a.writeElement(CCNProtocolDTags.AnswerOriginKind,this.answerOriginKind);null!=this.scope&&a.writeElement(CCNProtocolDTags.Scope,this.scope);null!=this.interestLifetime&&a.writeElement(CCNProtocolDTags.InterestLifetime,DataUtils.nonNegativeIntToBigEndian(4096*(this.interestLifetime/1E3)));null!=this.nonce&&a.writeElement(CCNProtocolDTags.Nonce,this.nonce);a.writeEndElement()};
-Interest.prototype.matches_name=function(a){return!this.name.match(a)||null!=this.minSuffixComponents&&!(a.components.length+1-this.name.components.length>=this.minSuffixComponents)||null!=this.maxSuffixComponents&&!(a.components.length+1-this.name.components.length<=this.maxSuffixComponents)||null!=this.exclude&&a.components.length>this.name.components.length&&this.exclude.matches(a.components[this.name.components.length])?!1:!0};var Exclude=function(a){this.values=a||[]};Exclude.ANY="*";
+Interest.prototype.matches_name=function(a){return!this.name.match(a)||null!=this.minSuffixComponents&&!(a.components.length+1-this.name.components.length>=this.minSuffixComponents)||null!=this.maxSuffixComponents&&!(a.components.length+1-this.name.components.length<=this.maxSuffixComponents)||null!=this.exclude&&a.components.length>this.name.components.length&&this.exclude.matches(a.components[this.name.components.length])?!1:!0};
+Interest.prototype.clone=function(){return new Interest(this.name,this.faceInstance,this.minSuffixComponents,this.maxSuffixComponents,this.publisherPublicKeyDigest,this.exclude,this.childSelector,this.answerOriginKind,this.scope,this.interestLifetime,this.nonce)};var Exclude=function(a){this.values=a||[]};Exclude.ANY="*";
 Exclude.prototype.from_ccnb=function(a){for(a.readStartElement(CCNProtocolDTags.Exclude);;)if(a.peekStartElement(CCNProtocolDTags.Component))this.values.push(a.readBinaryElement(CCNProtocolDTags.Component));else if(a.peekStartElement(CCNProtocolDTags.Any))a.readStartElement(CCNProtocolDTags.Any),a.readEndElement(),this.values.push(Exclude.ANY);else if(a.peekStartElement(CCNProtocolDTags.Bloom))a.readBinaryElement(CCNProtocolDTags.Bloom),this.values.push(Exclude.ANY);else break;a.readEndElement()};
 Exclude.prototype.to_ccnb=function(a){if(!(null==this.values||0==this.values.length)){a.writeStartElement(CCNProtocolDTags.Exclude);for(var b=0;b<this.values.length;++b)this.values[b]==Exclude.ANY?(a.writeStartElement(CCNProtocolDTags.Any),a.writeEndElement()):a.writeElement(CCNProtocolDTags.Component,this.values[b]);a.writeEndElement()}};
 Exclude.prototype.to_uri=function(){if(null==this.values||0==this.values.length)return"";for(var a="",b=0;b<this.values.length;++b)0<b&&(a+=","),a=this.values[b]==Exclude.ANY?a+"*":a+Name.toEscapedString(this.values[b]);return a};
@@ -296,19 +299,20 @@
 NDN.makeShuffledGetHostAndPort=function(a,b){a=a.slice(0,a.length);DataUtils.shuffle(a);return function(){return 0==a.length?null:{host:a.splice(0,1)[0],port:b}}};
 NDN.prototype.expressInterest=function(a,b,c){var d=new Interest(a);null!=c?(d.minSuffixComponents=c.minSuffixComponents,d.maxSuffixComponents=c.maxSuffixComponents,d.publisherPublicKeyDigest=c.publisherPublicKeyDigest,d.exclude=c.exclude,d.childSelector=c.childSelector,d.answerOriginKind=c.answerOriginKind,d.scope=c.scope,d.interestLifetime=c.interestLifetime):d.interestLifetime=4E3;if(null==this.host||null==this.port)if(null==this.getHostAndPort)console.log("ERROR: host OR port NOT SET");else{var e=
 this;this.connectAndExecute(function(){e.reconnectAndExpressInterest(d,b)})}else this.reconnectAndExpressInterest(d,b)};NDN.prototype.reconnectAndExpressInterest=function(a,b){if(this.transport.connectedHost!=this.host||this.transport.connectedPort!=this.port){var c=this;this.transport.connect(c,function(){c.expressInterestHelper(a,b)})}else this.expressInterestHelper(a,b)};
-NDN.prototype.expressInterestHelper=function(a,b){if(null!=b){var c=new PITEntry(a,b);NDN.PITTable.push(c);b.pitEntry=c}var d=this;null!=b&&(c.timerID=setTimeout(function(){3<LOG&&console.log("Interest time out.");var e=NDN.PITTable.indexOf(c);0<=e&&NDN.PITTable.splice(e,1);b.upcall(Closure.UPCALL_INTEREST_TIMED_OUT,new UpcallInfo(d,a,0,null))},a.interestLifetime||4E3));this.transport.send(encodeToBinaryInterest(a))};
+NDN.prototype.expressInterestHelper=function(a,b){var c=encodeToBinaryInterest(a),d=this;if(null!=b){var e=new PITEntry(a,b);NDN.PITTable.push(e);b.pitEntry=e;var f=a.interestLifetime||4E3,g=function(){3<LOG&&console.log("Interest time out: "+a.name.to_uri());var j=NDN.PITTable.indexOf(e);0<=j&&NDN.PITTable.splice(j,1);b.upcall(Closure.UPCALL_INTEREST_TIMED_OUT,new UpcallInfo(d,a,0,null))==Closure.RESULT_REEXPRESS&&(3<LOG&&console.log("Re-express interest: "+a.name.to_uri()),e.timerID=setTimeout(g,
+f),NDN.PITTable.push(e),d.transport.send(c))};e.timerID=setTimeout(g,f)}this.transport.send(c)};
 NDN.prototype.registerPrefix=function(a,b,c){var d=this,e=function(){if(null==d.ccndid){var e=new Interest(NDN.ccndIdFetcher);e.interestLifetime=4E3;3<LOG&&console.log("Expressing interest for ccndid from ccnd.");d.reconnectAndExpressInterest(e,new NDN.FetchCcndidClosure(d,a,b,c))}else d.registerPrefixHelper(a,b,c)};null==this.host||null==this.port?null==this.getHostAndPort?console.log("ERROR: host OR port NOT SET"):this.connectAndExecute(e):e()};
 NDN.FetchCcndidClosure=function(a,b,c,d){Closure.call(this);this.ndn=a;this.name=b;this.callerClosure=c;this.flag=d};
 NDN.FetchCcndidClosure.prototype.upcall=function(a,b){if(a==Closure.UPCALL_INTEREST_TIMED_OUT)return console.log("Timeout while requesting the ccndid.  Cannot registerPrefix for "+this.name.to_uri()+" ."),Closure.RESULT_OK;if(!(a==Closure.UPCALL_CONTENT||a==Closure.UPCALL_CONTENT_UNVERIFIED))return Closure.RESULT_ERR;var c=b.contentObject;!c.signedInfo||!c.signedInfo.publisher||!c.signedInfo.publisher.publisherPublicKeyDigest?console.log("ContentObject doesn't have a publisherPublicKeyDigest. Cannot set ccndid and registerPrefix for "+
 this.name.to_uri()+" ."):(3<LOG&&console.log("Got ccndid from ccnd."),this.ndn.ccndid=c.signedInfo.publisher.publisherPublicKeyDigest,3<LOG&&console.log(this.ndn.ccndid),this.ndn.registerPrefixHelper(this.name,this.callerClosure,this.flag));return Closure.RESULT_OK};
 NDN.prototype.registerPrefixHelper=function(a,b){var c=new ForwardingEntry("selfreg",a,null,null,3,2147483647),c=encodeForwardingEntry(c),d=new SignedInfo;d.setFields();c=new ContentObject(new Name,d,c,new Signature);c.sign();c=encodeToBinaryContentObject(c);c=new Name(["ccnx",this.ccndid,"selfreg",c]);c=new Interest(c);c.scope=1;3<LOG&&console.log("Send Interest registration packet.");d=new CSEntry(a.getName(),b);NDN.CSTable.push(d);this.transport.send(encodeToBinaryInterest(c))};
 NDN.prototype.onReceivedElement=function(a){3<LOG&&console.log("Complete element received. Length "+a.length+". Start decoding.");var b=new BinaryXMLDecoder(a);if(b.peekStartElement(CCNProtocolDTags.Interest))3<LOG&&console.log("Interest packet received."),a=new Interest,a.from_ccnb(b),3<LOG&&console.log(a),b=escape(a.name.getName()),3<LOG&&console.log(b),b=getEntryForRegisteredPrefix(b),null!=b&&(a=new UpcallInfo(this,a,0,null),b.closure.upcall(Closure.UPCALL_INTEREST,a)==Closure.RESULT_INTEREST_CONSUMED&&
-null!=a.contentObject&&this.transport.send(encodeToBinaryContentObject(a.contentObject)));else if(b.peekStartElement(CCNProtocolDTags.ContentObject)){3<LOG&&console.log("ContentObject packet received.");a=new ContentObject;a.from_ccnb(b);var c=NDN.getEntryForExpressedInterest(a.name);if(null!=c)if(b=NDN.PITTable.indexOf(c),0<=b&&NDN.PITTable.splice(b,1),b=c.closure,clearTimeout(c.timerID),!1==this.verify)b.upcall(Closure.UPCALL_CONTENT_UNVERIFIED,new UpcallInfo(this,null,0,a));else{var d=function(a,
+null!=a.contentObject&&this.transport.send(encodeToBinaryContentObject(a.contentObject)));else if(b.peekStartElement(CCNProtocolDTags.ContentObject)){if(3<LOG&&console.log("ContentObject packet received."),a=new ContentObject,a.from_ccnb(b),b=NDN.getEntryForExpressedInterest(a.name),null!=b){clearTimeout(b.timerID);var c=NDN.PITTable.indexOf(b);0<=c&&NDN.PITTable.splice(c,1);b=b.closure;if(!1==this.verify)b.upcall(Closure.UPCALL_CONTENT_UNVERIFIED,new UpcallInfo(this,null,0,a));else{var d=function(a,
 b,c,d,e){this.contentObject=a;this.closure=b;this.keyName=c;this.sigHex=d;this.witness=e;Closure.call(this)},e=this;d.prototype.upcall=function(a,b){if(a==Closure.UPCALL_INTEREST_TIMED_OUT)console.log("In KeyFetchClosure.upcall: interest time out."),console.log(this.keyName.contentName.getName());else if(a==Closure.UPCALL_CONTENT){var c=decodeSubjectPublicKeyInfo(b.contentObject.content),d=!0==c.verifyByteArray(this.contentObject.rawSignatureData,this.witness,this.sigHex)?Closure.UPCALL_CONTENT:Closure.UPCALL_CONTENT_BAD;
 this.closure.upcall(d,new UpcallInfo(e,null,0,this.contentObject));c=new KeyStoreEntry(g.keyName,c,(new Date).getTime());NDN.addKeyEntry(c)}else a==Closure.UPCALL_CONTENT_BAD&&console.log("In KeyFetchClosure.upcall: signature verification failed")};if(a.signedInfo&&a.signedInfo.locator&&a.signature){3<LOG&&console.log("Key verification...");var c=DataUtils.toHex(a.signature.signature).toLowerCase(),f=null;null!=a.signature.Witness&&(f=new Witness,f.decode(a.signature.Witness));var g=a.signedInfo.locator;
 if(g.type==KeyLocatorType.KEYNAME)if(3<LOG&&console.log("KeyLocator contains KEYNAME"),g.keyName.contentName.match(a.name))3<LOG&&console.log("Content is key itself"),d=decodeSubjectPublicKeyInfo(a.content),c=d.verifyByteArray(a.rawSignatureData,f,c),c=!0==c?Closure.UPCALL_CONTENT:Closure.UPCALL_CONTENT_BAD,b.upcall(c,new UpcallInfo(this,null,0,a));else{var j=NDN.getKeyByName(g.keyName);j?(3<LOG&&console.log("Local key cache hit"),d=j.rsaKey,c=d.verifyByteArray(a.rawSignatureData,f,c),c=!0==c?Closure.UPCALL_CONTENT:
 Closure.UPCALL_CONTENT_BAD,b.upcall(c,new UpcallInfo(this,null,0,a))):(3<LOG&&console.log("Fetch key according to keylocator"),a=new d(a,b,g.keyName,c,f),this.expressInterest(g.keyName.contentName.getPrefix(4),a))}else g.type==KeyLocatorType.KEY?(3<LOG&&console.log("Keylocator contains KEY"),d=decodeSubjectPublicKeyInfo(a.signedInfo.locator.publicKey),c=d.verifyByteArray(a.rawSignatureData,f,c),c=!0==c?Closure.UPCALL_CONTENT:Closure.UPCALL_CONTENT_BAD,b.upcall(Closure.UPCALL_CONTENT,new UpcallInfo(this,
-null,0,a))):(a=g.certificate,console.log("KeyLocator contains CERT"),console.log(a))}}}else console.log("Incoming packet is not Interest or ContentObject. Discard now.")};
+null,0,a))):(a=g.certificate,console.log("KeyLocator contains CERT"),console.log(a))}}}}else console.log("Incoming packet is not Interest or ContentObject. Discard now.")};
 NDN.prototype.connectAndExecute=function(a){var b=this.getHostAndPort();if(null==b)console.log("ERROR: No more hosts from getHostAndPort"),this.host=null;else if(b.host==this.host&&b.port==this.port)console.log("ERROR: The host returned by getHostAndPort is not alive: "+this.host+":"+this.port);else{this.host=b.host;this.port=b.port;3<LOG&&console.log("Connect: trying host from getHostAndPort: "+this.host);b=new Interest(new Name("/"));b.interestLifetime=4E3;var c=this,d=setTimeout(function(){3<LOG&&
 console.log("Connect: timeout waiting for host "+c.host);c.connectAndExecute(a)},3E3);this.reconnectAndExpressInterest(b,new NDN.ConnectClosure(this,a,d))}};NDN.ConnectClosure=function(a,b,c){Closure.call(this);this.ndn=a;this.onConnected=b;this.timerID=c};NDN.ConnectClosure.prototype.upcall=function(a){if(!(a==Closure.UPCALL_CONTENT||a==Closure.UPCALL_CONTENT_UNVERIFIED))return Closure.RESULT_ERR;clearTimeout(this.timerID);this.ndn.readyStatus=NDN.OPENED;this.ndn.onopen();this.onConnected();return Closure.RESULT_OK};
 var BinaryXmlElementReader=function(a){this.elementListener=a;this.dataParts=[];this.structureDecoder=new BinaryXMLStructureDecoder};