diff --git a/lib/PayPro.js b/lib/PayPro.js
index 22894916d..9d3f5d34e 100644
--- a/lib/PayPro.js
+++ b/lib/PayPro.js
@@ -17,12 +17,19 @@ PayPro.prototype.x509Sign = function(key, returnTrust) {
   pki_data = PayPro.X509Certificates.decode(pki_data);
   pki_data = pki_data.certificate;
   var details = this.get('serialized_payment_details');
-  var type = pki_type.split('+')[1].toUpperCase();
+  var type = pki_type !== 'none'
+    ? pki_type.split('+')[1].toUpperCase()
+    : pki_type;
 
-  var signature = crypto.createSign('RSA-' + type);
-  var buf = this.serializeForSig();
-  signature.update(buf);
-  var sig = signature.sign(key);
+  if (type !== 'none') {
+    var signature = crypto.createSign('RSA-' + type);
+    var buf = this.serializeForSig();
+    signature.update(buf);
+    var sig = signature.sign(key);
+  } else {
+    var buf = this.serializeForSig();
+    var sig = '';
+  }
 
   if (returnTrust) {
     var cert = pki_data[pki_data.length - 1];
@@ -57,15 +64,20 @@ PayPro.prototype.x509Verify = function(returnTrust) {
   pki_data = pki_data.certificate;
   var details = this.get('serialized_payment_details');
   var buf = this.serializeForSig();
-  var type = pki_type.split('+')[1].toUpperCase();
+  var type = pki_type !== 'none'
+    ? pki_type.split('+')[1].toUpperCase()
+    : pki_type;
 
-  var verifier = crypto.createVerify('RSA-' + type);
-  verifier.update(buf);
-
-  var signedCert = pki_data[0];
-  var der = signedCert.toString('hex');
-  var pem = PayPro.DERtoPEM(der, 'CERTIFICATE');
-  var verified = verifier.verify(pem, sig);
+  if (type !== 'none') {
+    var verifier = crypto.createVerify('RSA-' + type);
+    verifier.update(buf);
+    var signedCert = pki_data[0];
+    var der = signedCert.toString('hex');
+    var pem = PayPro.DERtoPEM(der, 'CERTIFICATE');
+    var verified = verifier.verify(pem, sig);
+  } else {
+    var verified = true;
+  }
 
   var chain = pki_data;
 
@@ -177,7 +189,7 @@ PayPro.verifyCertChain = function(chain, type) {
     // from the DER Certificate:
     var tbs = PayPro.getTBSCertificate(data);
 
-    var verifier = crypto.createVerify('RSA-' + sigAlg);
+    var verifier = crypto.createVerify(type ? 'RSA-' + type : 'RSA');
     verifier.update(tbs);
     var sigVerified = verifier.verify(npubKey, sig);
 
diff --git a/lib/browser/PayPro.js b/lib/browser/PayPro.js
index 44aa42416..f62e125cc 100644
--- a/lib/browser/PayPro.js
+++ b/lib/browser/PayPro.js
@@ -18,23 +18,29 @@ PayPro.prototype.x509Sign = function(key, returnTrust) {
   var pki_data = this.get('pki_data'); // contains one or more x509 certs
   pki_data = PayPro.X509Certificates.decode(pki_data);
   pki_data = pki_data.certificate;
-  var type = pki_type.split('+')[1].toUpperCase();
+  var type = pki_type !== 'none'
+    ? pki_type.split('+')[1].toUpperCase()
+    : pki_type;
   var buf = this.serializeForSig();
 
   var rsa = new KJUR.RSAKey();
   rsa.readPrivateKeyFromPEMString(key.toString());
   key = rsa;
 
-  var jsrsaSig = new KJUR.crypto.Signature({
-    alg: type + 'withRSA',
-    prov: 'cryptojs/jsrsa'
-  });
+  if (type !== 'none') {
+    var jsrsaSig = new KJUR.crypto.Signature({
+      alg: type + 'withRSA',
+      prov: 'cryptojs/jsrsa'
+    });
 
-  jsrsaSig.init(key);
+    jsrsaSig.init(key);
 
-  jsrsaSig.updateHex(buf.toString('hex'));
+    jsrsaSig.updateHex(buf.toString('hex'));
 
-  var sig = new Buffer(jsrsaSig.sign(), 'hex');
+    var sig = new Buffer(jsrsaSig.sign(), 'hex');
+  } else {
+    var sig = '';
+  }
 
   if (returnTrust) {
     var cert = pki_data[pki_data.length - 1];
@@ -66,20 +72,25 @@ PayPro.prototype.x509Verify = function(returnTrust) {
   pki_data = PayPro.X509Certificates.decode(pki_data);
   pki_data = pki_data.certificate;
   var buf = this.serializeForSig();
-  var type = pki_type.split('+')[1].toUpperCase();
+  var type = pki_type !== 'none'
+    ? pki_type.split('+')[1].toUpperCase()
+    : pki_type;
 
-  var jsrsaSig = new KJUR.crypto.Signature({
-    alg: type + 'withRSA',
-    prov: 'cryptojs/jsrsa'
-  });
-
-  var signedCert = pki_data[0];
-  var der = signedCert.toString('hex');
-  // var pem = self._DERtoPEM(der, 'CERTIFICATE');
-  var pem = KJUR.asn1.ASN1Util.getPEMStringFromHex(der, 'CERTIFICATE');
-  jsrsaSig.initVerifyByCertificatePEM(pem);
-  jsrsaSig.updateHex(buf.toString('hex'));
-  var verified = jsrsaSig.verify(sig.toString('hex'));
+  if (type !== 'none') {
+    var jsrsaSig = new KJUR.crypto.Signature({
+      alg: type + 'withRSA',
+      prov: 'cryptojs/jsrsa'
+    });
+    var signedCert = pki_data[0];
+    var der = signedCert.toString('hex');
+    // var pem = self._DERtoPEM(der, 'CERTIFICATE');
+    var pem = KJUR.asn1.ASN1Util.getPEMStringFromHex(der, 'CERTIFICATE');
+    jsrsaSig.initVerifyByCertificatePEM(pem);
+    jsrsaSig.updateHex(buf.toString('hex'));
+    var verified = jsrsaSig.verify(sig.toString('hex'));
+  } else {
+    var verified = true;
+  }
 
   var chain = pki_data;
 
@@ -169,12 +180,14 @@ PayPro.verifyCertChain = function(chain, type) {
     //
     // Get Public Key from next certificate (via KJUR because it's a mess):
     //
-    var js = new KJUR.crypto.Signature({
-      alg: type + 'withRSA',
-      prov: 'cryptojs/jsrsa'
-    });
-    js.initVerifyByCertificatePEM(npem);
-    var npubKey = js.pubKey;
+    if (type !== 'none') {
+      var js = new KJUR.crypto.Signature({
+        alg: type + 'withRSA',
+        prov: 'cryptojs/jsrsa'
+      });
+      js.initVerifyByCertificatePEM(npem);
+      var npubKey = js.pubKey;
+    }
     // XXX Somehow change the pubKey format to npubKeyAlg.
 
     //
@@ -199,19 +212,23 @@ PayPro.verifyCertChain = function(chain, type) {
     // Verify current Certificate signature
     //
 
-    var jsrsaSig = new KJUR.crypto.Signature({
-      alg: type + 'withRSA',
-      prov: 'cryptojs/jsrsa'
-    });
-    jsrsaSig.initVerifyByPublicKey(npubKey);
+    if (type !== 'none') {
+      var jsrsaSig = new KJUR.crypto.Signature({
+        alg: type + 'withRSA',
+        prov: 'cryptojs/jsrsa'
+      });
+      jsrsaSig.initVerifyByPublicKey(npubKey);
 
-    // Get the raw DER TBSCertificate
-    // from the DER Certificate:
-    var tbs = PayPro.getTBSCertificate(data);
+      // Get the raw DER TBSCertificate
+      // from the DER Certificate:
+      var tbs = PayPro.getTBSCertificate(data);
 
-    jsrsaSig.updateHex(tbs.toString('hex'));
+      jsrsaSig.updateHex(tbs.toString('hex'));
 
-    var sigVerified = jsrsaSig.verify(sig.toString('hex'));
+      var sigVerified = jsrsaSig.verify(sig.toString('hex'));
+    } else {
+      var sigVerified = true;
+    }
 
     return validityVerified
       && issuerVerified