diff --git a/CHANGELOG b/CHANGELOG
new file mode 100644
index 0000000..2fd76e2
--- /dev/null
+++ b/CHANGELOG
@@ -0,0 +1,9 @@
+v1.2.1 - Allow PPID reuse
+  * Now allows a single user to use the same PPID for multiple sites
+
+v1.2.0 - Issuer Pub/Priv Key and Grant APIs for OAuth3
+  * Resource Owner Password token exchange
+  * Implicit Grant token exchange
+  * Public / Private Keypair generation
+  * Public key (remember device) syncing
+  * BUG: ppid rescoping is not handled correctly for 3rd parties
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..6297ea2
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,41 @@
+Copyright 2017 Daplie, Inc
+
+This is open source software; you can redistribute it and/or modify it under the
+terms of either:
+
+   a) the "MIT License"
+   b) the "Apache-2.0 License"
+
+MIT License
+
+   Permission is hereby granted, free of charge, to any person obtaining a copy
+   of this software and associated documentation files (the "Software"), to deal
+   in the Software without restriction, including without limitation the rights
+   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+   copies of the Software, and to permit persons to whom the Software is
+   furnished to do so, subject to the following conditions:
+
+   The above copyright notice and this permission notice shall be included in all
+   copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+   SOFTWARE.
+
+Apache-2.0 License Summary
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/README.md b/README.md
index 76101ed..61b6bfd 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,12 @@
 issuer@oauth3.org (js)
 ======================
 
+| [oauth3.js](https://git.oauth3.org/OAuth3/oauth3.js)
+| [issuer.html](https://git.oauth3.org/OAuth3/issuer.html)
+| *issuer.rest.walnut.js*
+| [issuer.srv](https://git.oauth3.org/OAuth3/issuer.srv)
+| Sponsored by [Daplie](https://daplie.com)
+
 Implementation of server-side RESTful OAuth3 issuer APIs.
 
 These are the OAuth3 APIs that allow for creation and retrieval of public keys
diff --git a/common.js b/common.js
index e95ea5b..eae7c05 100644
--- a/common.js
+++ b/common.js
@@ -40,5 +40,28 @@ function checkIssuerToken(req, expectedSub) {
   });
 }
 
+async function getPrimarySub(grantStore, secondary) {
+  var results = await Promise.all([
+    grantStore.find({ sub:    secondary }),
+    grantStore.find({ azpSub: secondary }),
+  ]);
+
+  // Extract only the sub field from each row and reduce the duplicates so that each value
+  // can only appear in the final list once.
+  var subList = [].concat.apply([], results).map(grant => grant.sub);
+  subList = subList.filter((sub, ind, list) => list.indexOf(sub) === ind);
+
+  if (subList.length > 1) {
+    // This should not ever happen since there is a check for PPID collisions when saving
+    // grants, but it's probably better to have this check anyway just incase something
+    // happens that isn't currently accounted for.
+    console.error('acounts ' + JSON.stringify(subList) + ' are all associated with "'+secondary+'"');
+    throw new Error('PPID collision');
+  }
+
+  return subList[0];
+}
+
 module.exports.checkIssuerToken = checkIssuerToken;
+module.exports.getPrimarySub = getPrimarySub;
 module.exports.makeB64UrlSafe = makeB64UrlSafe;
diff --git a/grants.js b/grants.js
index dec2d1d..2fe161a 100644
--- a/grants.js
+++ b/grants.js
@@ -56,14 +56,16 @@ function create(app) {
         throw new OpErr("malformed request: 'sub' and 'scope' must be strings");
       }
 
-      return req.Store.find({ azpSub: req.body.sub });
-    }).then(function (existing) {
-      if (existing.length) {
-        if (existing.length > 1) {
-          throw new OpErr("pre-existing PPID collision detected");
-        } else if (existing[0].sub !== req.params.sub || existing[0].azp !== req.params.azp) {
-          throw new OpErr("PPID collision detected, cannot save authorized party's sub");
+      return require('./common').getPrimarySub(req.Store, req.body.sub).catch(function (err) {
+        if (/collision/.test(err.message)) {
+          err.message = 'pre-existing PPID collision detected';
         }
+        throw err;
+      });
+    }).then(function (primSub) {
+      if (primSub && primSub !== req.params.sub) {
+        console.log('account "'+req.params.sub+'" cannot use PPID "'+req.body.sub+'" already used by "'+primSub+'"');
+        throw new OpErr("PPID collision detected, cannot save authorized party's sub");
       }
 
       var grant = {
diff --git a/jwks.js b/jwks.js
index 1e4bde6..0be4092 100644
--- a/jwks.js
+++ b/jwks.js
@@ -33,58 +33,58 @@ function thumbprint(jwk) {
   return PromiseA.resolve(makeB64UrlSafe(hash));
 }
 
+function sanitizeJwk(jwk) {
+  // We need to sanitize the key to make sure we don't deliver any private keys fields if
+  // we were given a key we could use to sign tokens on behalf of the user. We also don't
+  // want to deliver the sub or any other PPIDs.
+  var whitelist = ['kty', 'alg', 'kid', 'use'];
+  if (jwk.kty === 'EC') {
+    whitelist = whitelist.concat(['crv', 'x', 'y']);
+  } else if (jwk.kty === 'RSA') {
+    whitelist = whitelist.concat(['e', 'n']);
+  }
+
+  var result = {};
+  whitelist.forEach(function (key) {
+    result[key] = jwk[key];
+  });
+  return result;
+}
+
 function create(app) {
   var restful = {};
-  restful.get = function (req, res) {
-    // The sub in params is the 3rd party PPID, but the keys are stored by the issuer PPID, so
-    // we need to look up the issuer PPID using the 3rd party PPID.
-    var promise = req.getSiteStore().then(function (store) {
-      if (req.params.kid === req.experienceId) {
-        return store.IssuerOauth3OrgPrivateKeys.get(req.experienceId);
+
+  async function getRawKey(req) {
+    var store = await req.getSiteStore();
+
+    if (req.params.kid === req.experienceId) {
+      return store.IssuerOauth3OrgPrivateKeys.get(req.experienceId);
+    }
+
+    // The keys are stored by the issuer PPID, but the sub we have might be a different PPID
+    // for a 3rd party.
+    var issuerSub;
+    try {
+      issuerSub = await require('./common').getPrimarySub(store.IssuerOauth3OrgGrants, req.params.sub);
+    } catch (err) {
+      if (/collision/.test(err.message)) {
+        err.message = 'PPID collision - unable to safely retrieve keys';
       }
+      throw err;
+    }
 
-      // First we check to see if the key is being requested by the `sub` that we as the issuer use
-      // to identify the user, and if not then we need to look up the specified `sub` to see if
-      // we can determine which (if any) account it's associated with.
-      return store.IssuerOauth3OrgJwks.get(req.params.sub+'/'+req.params.kid).then(function (jwk) {
-        if (jwk) {
-          return jwk;
-        }
+    if (!issuerSub) {
+      throw new OpErr("unknown PPID '" + req.params.sub + "'");
+    }
+    return store.IssuerOauth3OrgJwks.get(issuerSub + '/' + req.params.kid);
+  }
 
-        return store.IssuerOauth3OrgGrants.find({ azpSub: req.params.sub }).then(function (results) {
-          if (!results.length) {
-            throw new OpErr("unknown PPID '"+req.params.sub+"'");
-          }
-          if (results.length > 1) {
-            // This should not ever happen since there is a check for PPID collisions when saving
-            // grants, but it's probably better to have this check anyway just incase something
-            // happens that isn't currently accounted for.
-            throw new OpErr('PPID collision - unable to safely retrieve keys');
-          }
-
-          return store.IssuerOauth3OrgJwks.get(results[0].sub+'/'+req.params.kid);
-        });
-      });
-    }).then(function (jwk) {
+  restful.get = function (req, res) {
+    var promise = PromiseA.resolve(getRawKey(req)).then(function (jwk) {
       if (!jwk) {
         throw new OpErr("no keys stored with kid '"+req.params.kid+"' for PPID "+req.params.sub);
       }
-
-      // We need to sanitize the key to make sure we don't deliver any private keys fields if
-      // we were given a key we could use to sign tokens on behalf of the user. We also don't
-      // want to deliver the sub or any other PPIDs.
-      var whitelist = [ 'kty', 'alg', 'kid', 'use' ];
-      if (jwk.kty === 'EC') {
-        whitelist = whitelist.concat([ 'crv', 'x', 'y' ]);
-      } else if (jwk.kty === 'RSA') {
-        whitelist = whitelist.concat([ 'e', 'n' ]);
-      }
-
-      var result = {};
-      whitelist.forEach(function (key) {
-        result[key] = jwk[key];
-      });
-      return result;
+      return sanitizeJwk(jwk);
     });
 
     app.handlePromise(req, res, promise, "[issuer@oauth3.org] retrieve JWK");
diff --git a/package.json b/package.json
index 3dc956a..103e901 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "issuer_oauth3.org",
-  "version": "1.0.0-placeholder",
+  "version": "1.2.1",
   "description": "Implementation of server-side RESTful OAuth3 issuer APIs",
   "main": "rest.js",
   "scripts": {
@@ -8,7 +8,7 @@
   },
   "repository": {
     "type": "git",
-    "url": "git+https://git.daplie.com/Oauth3/issuer_oauth3.org.git"
+    "url": "git+https://git.oauth3.org/OAuth3/issuer.rest.walnut.js.git"
   },
   "dependencies": {
     "bluebird": "^3.5.0",