diff --git a/ChangeLog.md b/ChangeLog.md
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--- /dev/null
+++ b/ChangeLog.md
@@ -0,0 +1,3 @@
+# Changelog for metro-transport-xor
+
+## Unreleased changes
diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,30 @@
+Copyright Lupino (c) 2020
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Lupino nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
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+# metro-transport-xor
+
+XOR transport for metro
diff --git a/Setup.hs b/Setup.hs
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--- /dev/null
+++ b/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
diff --git a/metro-transport-xor.cabal b/metro-transport-xor.cabal
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--- /dev/null
+++ b/metro-transport-xor.cabal
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+cabal-version: 1.12
+
+-- This file has been generated from package.yaml by hpack version 0.33.0.
+--
+-- see: https://github.com/sol/hpack
+--
+-- hash: 26cdb0c1ac2f5da948e47a5131ca3f08fb15757b56bac7f6d805154e32d656ad
+
+name:           metro-transport-xor
+version:        0.1.0.0
+synopsis:       XOR transport for metro
+description:    Please see the README on GitHub at <https://github.com/Lupino/metro/tree/master/metro-transport-xor#readme>
+category:       Web
+homepage:       https://github.com/Lupino/metro#readme
+bug-reports:    https://github.com/Lupino/metro/issues
+author:         Lupino
+maintainer:     lmjubuntu@gmail.com
+copyright:      MIT
+license:        BSD3
+license-file:   LICENSE
+build-type:     Simple
+extra-source-files:
+    README.md
+    ChangeLog.md
+
+source-repository head
+  type: git
+  location: https://github.com/Lupino/metro
+
+library
+  exposed-modules:
+      Metro.TP.XOR
+  other-modules:
+      Paths_metro_transport_xor
+  hs-source-dirs:
+      src
+  build-depends:
+      base >=4.7 && <5
+    , bytestring
+    , metro
+    , unliftio
+  default-language: Haskell2010
diff --git a/src/Metro/TP/XOR.hs b/src/Metro/TP/XOR.hs
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--- /dev/null
+++ b/src/Metro/TP/XOR.hs
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+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE TypeFamilies    #-}
+
+module Metro.TP.XOR
+  ( xorBS
+  , XOR
+  , xorConfig
+  ) where
+
+import           Data.Bits            (xor)
+import qualified Data.ByteString      as B
+import qualified Data.ByteString.Lazy as LB
+import           Metro.Class          (Transport (..))
+import qualified Metro.Lock           as L
+import           UnliftIO
+
+data XOR tp = XOR
+    { transport :: tp
+    , sn        :: TVar LB.ByteString
+    , rn        :: TVar LB.ByteString
+    , sl        :: L.Lock
+    , rl        :: L.Lock
+    }
+
+instance Transport tp => Transport (XOR tp) where
+  data TransportConfig (XOR tp) = XORConfig FilePath (TransportConfig tp)
+  newTransport (XORConfig fn config) = do
+    transport <- newTransport config
+    key <- LB.readFile fn
+    sn <- newTVarIO $ LB.cycle key
+    rn <- newTVarIO $ LB.cycle key
+    sl <- L.new
+    rl <- L.new
+    return XOR {..}
+
+  recvData XOR {..} nbytes = L.with rl $ xorBS rn =<< recvData transport nbytes
+  sendData XOR {..} bs = L.with sl $ xorBS sn bs >>= sendData transport
+  closeTransport XOR {..} = closeTransport transport
+
+xorBS :: TVar LB.ByteString -> B.ByteString -> IO B.ByteString
+xorBS ref bs = atomically $ do
+  buf <- readTVar ref
+  writeTVar ref $! LB.drop len buf
+  return . xor' $! LB.take len buf
+
+ where  bs' = LB.fromStrict bs
+        len = LB.length bs'
+        xor' = B.pack . LB.zipWith xor bs'
+
+xorConfig :: FilePath -> TransportConfig tp -> TransportConfig (XOR tp)
+xorConfig = XORConfig