diff --git a/js/models/PublicKeyRing.js b/js/models/PublicKeyRing.js
index a078c51f3..e047ecb9e 100644
--- a/js/models/PublicKeyRing.js
+++ b/js/models/PublicKeyRing.js
@@ -17,10 +17,10 @@ var log         = imports.log || console.log;
 var storage     = Storage.default();
 
 /*
- * This follow Electrum convetion, as described on
+ * This follow Electrum convetion, as described in
  * https://bitcointalk.org/index.php?topic=274182.0
  *
- * We should probably adapt the next standard once its ready as discussed at:
+ * We should probably adopt the next standard once it's ready, as discussed in:
  * http://sourceforge.net/p/bitcoin/mailman/message/32148600/
  *
  */
@@ -76,14 +76,16 @@ PublicKeyRing.read = function (id, passphrase) {
   if (data.id !== id) 
     throw new Error('Wrong id in data');
 
-  var config = { network: data.network === 'livenet' ? 
+  var config = { network: data.networkName === 'livenet' ? 
       bitcore.networks.livenet : bitcore.networks.testnet
   };
 
   var w = new PublicKeyRing(config);
 
-  w.requiredCopayers = data.neededCopayers;
+  w.requiredCopayers = data.requiredCopayers;
   w.totalCopayers = data.totalCopayers;
+  w.addressIndex = data.addressIndex;
+  w.changeAddressIndex = data.changeAddressIndex;
 
 //  this.bip32 = ;
   w.copayersBIP32 = data.copayersExtPubKeys.map( function (pk) { 
@@ -95,16 +97,24 @@ PublicKeyRing.read = function (id, passphrase) {
   return w;
 };
 
-PublicKeyRing.prototype.serialize = function () {
-  return JSON.stringify({
+PublicKeyRing.prototype.toObj = function() {
+  return {
     id: this.id,
-    network: this.network.name,
-    requiredCopayers: this.neededCopayers,
+    networkName: this.network.name,
+    requiredCopayers: this.requiredCopayers,
     totalCopayers: this.totalCopayers,
+
+    changeAddressIndex: this.changeAddressIndex,
+    addressIndex: this.addressIndex,
     copayersExtPubKeys: this.copayersBIP32.map( function (b) { 
       return b.extendedPublicKeyString(); 
     }),
-  });
+    ts: parseInt(Date.now() / 1000),
+  };
+};
+
+PublicKeyRing.prototype.serialize = function () {
+  return JSON.stringify(this.toObj());
 };
 
 
@@ -186,7 +196,7 @@ PublicKeyRing.prototype._checkIndexRange = function (index, isChange) {
 PublicKeyRing.prototype.getRedeemScript = function (index, isChange) {
   this._checkIndexRange(index, isChange);
 
-  var pubKeys = this.getCopayersPubKeys();
+  var pubKeys = this.getCopayersPubKeys(index, isChange);
   var script  = Script.createMultisig(this.requiredCopayers, pubKeys);
   return script;
 };
@@ -207,9 +217,9 @@ PublicKeyRing.prototype.generateAddress = function(isChange) {
   var ret =  
     this.getAddress(isChange ? this.changeAddressIndex : this.addressIndex, isChange);
   if (isChange) 
-    this.addressIndex++;
-  else 
     this.changeAddressIndex++;
+  else 
+    this.addressIndex++;
 
   return ret;
 
@@ -228,4 +238,78 @@ PublicKeyRing.prototype.getAddresses = function() {
   return ret;
 };
 
+PublicKeyRing.prototype._checkInPRK = function(inPKR) {
+  if (this.id !== inPKR.id)
+    throw new Error('inPRK id mismatch');
+
+  if (this.network.name !== inPKR.networkName)
+    throw new Error('inPRK network mismatch');
+
+  if (
+    this.requiredCopayers && inPKR.requiredCopayers &&
+    (this.requiredCopayers !== inPKR.requiredCopayers))
+    throw new Error('inPRK requiredCopayers mismatch');
+
+  if (
+    this.totalCopayers && inPKR.totalCopayers &&
+    (this.totalCopayers !== inPKR.totalCopayers))
+    throw new Error('inPRK requiredCopayers mismatch');
+
+  if (! inPKR.ts)
+    throw new Error('no ts at inPRK');
+};
+
+
+PublicKeyRing.prototype._mergeIndexes = function(inPKR) {
+  var hasChanged = false;
+
+  // Indexes
+  if (inPKR.changeAddressIndex > this.changeAddressIndex) {
+    this.changeAddressIndex = inPKR.changeAddressIndex;
+    hasChanged = true;
+  }
+
+  if (inPKR.addressIndex > this.addressIndex) {
+    this.addressIndex = inPKR.addressIndex;
+    hasChanged = true;
+  }
+  return hasChanged;
+};
+
+PublicKeyRing.prototype._mergePubkeys = function(inPKR) {
+  var hasChanged = false;
+  var l= this.copayersBIP32.length;
+
+  var self = this;
+
+  inPKR.copayersExtPubKeys.forEach( function(epk) {
+    var haveIt = false;
+    for(var j=0; j<l; j++) {
+      if (self.copayersBIP32[j].extendedPublicKeyString() === epk) {
+        haveIt=true;
+        break;
+      }
+    }
+    if (!haveIt) {
+      self.copayersBIP32.push(new BIP32(epk));
+      hasChanged=true;
+    }
+  });
+  return hasChanged;
+};
+
+PublicKeyRing.prototype.merge = function(inPKR) {
+  var hasChanged = false;
+
+  this._checkInPRK(inPKR);
+
+  if (this._mergeIndexes(inPKR))
+    hasChanged = true;
+
+  if (this._mergePubkeys(inPKR))
+    hasChanged = true;
+
+  return hasChanged;
+};
+
 module.exports = require('soop')(PublicKeyRing);
diff --git a/test/test.network.js b/test/test.network.js
deleted file mode 100644
index 069ffed6b..000000000
--- a/test/test.network.js
+++ /dev/null
@@ -1,21 +0,0 @@
-'use strict';
-
-var should = chai.should();
-describe('Network service', function() {
-
-  var network;
-  beforeEach(angular.mock.module('cosign'));
-
-  it('should exist', function() {
-    inject(function($injector) {
-      network = $injector.get('network');
-      should.exist(network);
-    });
-  });
-  it('should return 2', function() {
-    network.f().should.equal(2);
-  });
-  it('can start a tx signing request', function() {});
-  it('should', function() {});
-
-});
diff --git a/test/test.publickeyring.js b/test/test.publickeyring.js
index 38c992905..994911447 100644
--- a/test/test.publickeyring.js
+++ b/test/test.publickeyring.js
@@ -75,6 +75,10 @@ describe('PublicKeyRing model', function() {
     var k = createW();
     var w = k.w;
     var copayers = k.copayers;
+    for(var i=0; i<3; i++)
+      w.generateAddress(true);
+    for(var i=0; i<5; i++)
+      w.generateAddress(false);
 
     w.store().should.equal(true);
     var ID = w.id;
@@ -86,7 +90,9 @@ describe('PublicKeyRing model', function() {
     w2.addCopayer.bind().should.throw();
     for(var i =0; i<5; i++) 
       w2.addCopayer.bind(copayers[i]).should.throw();
- 
+
+    w2.changeAddressIndex.should.equal(3);   
+    w2.addressIndex.should.equal(5); 
   });
 
 
@@ -101,6 +107,10 @@ describe('PublicKeyRing model', function() {
         a.isValid().should.equal(true);
         a.isScript().should.equal(true);
         a.network().name.should.equal('livenet');
+        if (i>1) {
+          w.getAddress(i-1,isChange).should
+            .not.equal(w.getAddress(i-2,isChange));
+        }
       }
     }
   });
@@ -119,12 +129,136 @@ describe('PublicKeyRing model', function() {
  
     var as = w.getAddresses();
     as.length.should.equal(12);
-    for(var i in as) {
-      var a = new Address(as[i]);
+    for(var j in as) {
+      var a = new Address(as[j]);
       a.isValid().should.equal(true);
     }
   });
 
+  it('should count generation indexes', function () {
+    var k = createW();
+    var w = k.w;
+
+    for(var i=0; i<3; i++)
+      w.generateAddress(true);
+    for(var i=0; i<5; i++)
+      w.generateAddress(false);
+
+    w.changeAddressIndex.should.equal(3);   
+    w.addressIndex.should.equal(5); 
+  });
+
+  it('#merge index tests', function () {
+    var k = createW();
+    var w = k.w;
+
+    for(var i=0; i<2; i++)
+      w.generateAddress(true);
+    for(var i=0; i<3; i++)
+      w.generateAddress(false);
+
+    var w2 = new PublicKeyRing({
+      network: 'livenet',
+      id: w.id,
+    });
+    w2.merge(w.toObj()).should.equal(true);
+    w2.requiredCopayers.should.equal(3);   
+    w2.totalCopayers.should.equal(5);   
+    w2.changeAddressIndex.should.equal(2);   
+    w2.addressIndex.should.equal(3); 
+
+    //
+    w2.merge(w.toObj()).should.equal(false);
+  });
+
+
+  it('#merge check tests', function () {
+    var k = createW();
+    var w = k.w;
+
+    for(var i=0; i<2; i++)
+      w.generateAddress(true);
+    for(var i=0; i<3; i++)
+      w.generateAddress(false);
+
+
+    var w3 = new PublicKeyRing({
+      network: 'livenet',
+      id: w.id,
+      requiredCopayers: 2,
+    });
+    (function() { w3.merge(w.toObj());}).should.throw();
+
+    var w4 = new PublicKeyRing({
+      network: 'testnet',
+      id: w.id,
+    });
+    (function() { w4.merge(w.toObj());}).should.throw();
+
+    var w5 = new PublicKeyRing({
+      network: 'livenet',
+      id: w.id,
+      totalCopayers: 4, 
+    });
+    (function() { w5.merge(w.toObj());}).should.throw();
+
+    var w6 = new PublicKeyRing({
+      network: 'livenet',
+      id: w.id,
+    });
+    (function() { w6.merge(w);}).should.throw();
+    w.networkName= 'livenet';
+    (function() { w6.merge(w);}).should.throw();
+  });
+
+
+  it('#merge pubkey tests', function () {
+    var w = new PublicKeyRing(config);
+    should.exist(w);
+    var copayers = [];
+    for(var i=0; i<2; i++) {
+      w.haveAllRequiredPubKeys().should.equal(false);
+      w.addCopayer();
+    }
+
+    var w2 = new PublicKeyRing({
+      network: 'livenet',
+      id: w.id,
+    });
+    should.exist(w);
+    var copayers = [];
+    for(var i=0; i<3; i++) {
+      w2.haveAllRequiredPubKeys().should.equal(false);
+      w2.addCopayer();
+    }
+    w2.merge(w.toObj()).should.equal(true);
+    w2.haveAllRequiredPubKeys().should.equal(true);
+    w2.merge(w.toObj()).should.equal(false);
+
+    w.haveAllRequiredPubKeys().should.equal(false);
+    w.merge(w2.toObj()).should.equal(true);
+    w.haveAllRequiredPubKeys().should.equal(true);
+    w.merge(w2.toObj()).should.equal(false);
+  });
+
+  it('#merge pubkey tests (case 2)', function () {
+    var w = new PublicKeyRing(config);
+    should.exist(w);
+
+    for(var i=0; i<5; i++) {
+      w.haveAllRequiredPubKeys().should.equal(false);
+      var w2 = new PublicKeyRing({
+        network: 'livenet',
+        id: w.id,
+      });
+      w2.addCopayer();
+      w.merge(w2.toObj());
+    }
+    w.haveAllRequiredPubKeys().should.equal(true);
+  });
+
+
+
 });