diff --git a/onionr/core.py b/onionr/core.py
index c0682a98..2794aba4 100755
--- a/onionr/core.py
+++ b/onionr/core.py
@@ -23,7 +23,7 @@ import deadsimplekv as simplekv
 import onionrutils, onionrcrypto, onionrproofs, onionrevents as events, onionrexceptions
 import onionrblacklist
 from onionrusers import onionrusers
-import dbcreator, onionrstorage, serializeddata
+import dbcreator, onionrstorage, serializeddata, subprocesspow
 from etc import onionrvalues
 
 if sys.version_info < (3, 6):
@@ -787,8 +787,7 @@ class Core:
             metadata['expire'] = expire
 
         # send block data (and metadata) to POW module to get tokenized block data
-        proof = onionrproofs.POW(metadata, data)
-        payload = proof.waitForResult()
+        payload = subprocesspow.SubprocessPOW(data, metadata, self).start()
         if payload != False:
             try:
                 retData = self.setData(payload)
diff --git a/onionr/onionrproofs.py b/onionr/onionrproofs.py
index 496573d0..62dc215c 100755
--- a/onionr/onionrproofs.py
+++ b/onionr/onionrproofs.py
@@ -244,6 +244,7 @@ class POW:
         answer = ''
         hbCount = 0
         nonce = int(binascii.hexlify(nacl.utils.random(2)), 16)
+        startNonce = nonce
         while self.hashing:
             #token = nacl.hash.blake2b(rand + self.data).decode()
             self.metadata['powRandomToken'] = nonce
@@ -258,6 +259,7 @@ class POW:
                 self.hashing = False
                 iFound = True
                 self.result = payload
+                print('count', nonce - startNonce)
                 break
             nonce += 1
                 
diff --git a/onionr/static-data/www/shared/sites.js b/onionr/static-data/www/shared/sites.js
new file mode 100644
index 00000000..ab5c01a8
--- /dev/null
+++ b/onionr/static-data/www/shared/sites.js
@@ -0,0 +1,18 @@
+function checkHex(str) {
+    regexp = /^[0-9a-fA-F]+$/
+    if (regexp.test(str)){
+        return true
+    }
+    return false
+}
+
+document.getElementById('openSite').onclick = function(){
+    var hash = document.getElementById('siteViewer').value
+
+    if (checkHex(hash) && hash.length == 64){
+        window.location.href = '/site/' + hash
+    }
+    else{
+        alert('Invalid site hash')
+    }
+}
\ No newline at end of file
diff --git a/onionr/subprocesspow.py b/onionr/subprocesspow.py
new file mode 100755
index 00000000..a2fee7c6
--- /dev/null
+++ b/onionr/subprocesspow.py
@@ -0,0 +1,92 @@
+#!/usr/bin/env python3
+import subprocess, sys, os
+import multiprocessing, threading, time, json, math, binascii
+from multiprocessing import Pipe, Process
+import core, onionrblockapi, config, onionrutils, logger, onionrproofs
+
+class SubprocessPOW:
+    def __init__(self, data, metadata, core_inst=None, subprocCount=None):
+        if core_inst is None:
+            core_inst = core.Core()
+        if subprocCount is None:
+            subprocCount = os.cpu_count()
+        self.subprocCount = subprocCount
+        self.result = ''
+        self.shutdown = False
+        self.core_inst = core_inst
+        self.data = data
+        self.metadata = metadata
+
+        dataLen = len(data) + len(json.dumps(metadata))
+
+        #if forceDifficulty > 0:
+        #    self.difficulty = forceDifficulty
+        #else:
+            # Calculate difficulty. Dumb for now, may use good algorithm in the future.
+        self.difficulty = onionrproofs.getDifficultyForNewBlock(dataLen)
+            
+        try:
+            self.data = self.data.encode()
+        except AttributeError:
+            pass
+        
+        logger.info('Computing POW (difficulty: %s)...' % self.difficulty)
+
+        self.mainHash = '0' * 64
+        self.puzzle = self.mainHash[0:min(self.difficulty, len(self.mainHash))]
+        self.shutdown = False
+        self.payload = None
+
+    def start(self):
+        startTime = self.core_inst._utils.getEpoch()
+        for x in range(self.subprocCount):
+            threading.Thread(target=self._spawn_proc).start()
+        while True:
+            if self.payload is None:
+                time.sleep(0.1)
+            else:
+                self.shutdown = True
+                return self.payload
+    
+    def _spawn_proc(self):
+        parent_conn, child_conn = Pipe()
+        p = Process(target=self.do_pow, args=(child_conn,))
+        p.start()
+        p.join()
+        payload = None
+        try:
+            while True:
+                data = parent_conn.recv()
+                if len(data) >= 1:
+                    payload = data
+                    break
+        except KeyboardInterrupt:
+            pass
+        finally:
+            parent_conn.send('shutdown')
+            self.payload = payload
+
+    def do_pow(self, pipe):
+        nonce = int(binascii.hexlify(os.urandom(2)), 16)
+        nonceStart = nonce
+        data = self.data
+        metadata = self.metadata
+        puzzle = self.puzzle
+        difficulty = self.difficulty
+        mcore = core.Core()
+        while True:
+            metadata['powRandomToken'] = nonce
+            payload = json.dumps(metadata).encode() + b'\n' + data
+            token = mcore._crypto.sha3Hash(payload)
+            try:
+                # on some versions, token is bytes
+                token = token.decode()
+            except AttributeError:
+                pass
+            if pipe.poll() and pipe.recv() == 'shutdown':
+                break
+            if puzzle == token[0:difficulty]:
+                pipe.send(payload)
+                break
+            nonce += 1
+        
\ No newline at end of file