diff --git a/src/algo/rsa.cpp b/src/algo/rsa.cpp
new file mode 100644
index 0000000..66361fb
--- /dev/null
+++ b/src/algo/rsa.cpp
@@ -0,0 +1,135 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014-2015,  Regents of the University of California
+ *
+ * This file is part of gep (Group-based Encryption Protocol for NDN).
+ * See AUTHORS.md for complete list of gep authors and contributors.
+ *
+ * gep is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * gep is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * gep, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <ndn-cxx/encoding/buffer-stream.hpp>
+#include "rsa.hpp"
+
+namespace ndn {
+namespace gep {
+namespace algo {
+
+using namespace CryptoPP;
+
+Buffer
+crypt(SimpleProxyFilter* filter, const Buffer& data);
+
+DecryptKey<Rsa>
+Rsa::generateKey(RandomNumberGenerator& rng, RsaKeyParams& params)
+{
+  RSA::PrivateKey privateKey;
+  privateKey.GenerateRandomWithKeySize(rng, params.getKeySize());
+
+  OBufferStream obuf;
+  privateKey.Save(FileSink(obuf).Ref());
+
+  DecryptKey<Rsa> decryptKey(std::move(*obuf.buf()));
+  return decryptKey;
+}
+
+EncryptKey<Rsa>
+Rsa::deriveEncryptKey(const Buffer& keyBits)
+{
+  RSA::PrivateKey privateKey;
+
+  ByteQueue keyQueue;
+  keyQueue.LazyPut(keyBits.get(), keyBits.size());
+  privateKey.Load(keyQueue);
+
+  RSA::PublicKey publicKey(privateKey);
+
+  OBufferStream obuf;
+  publicKey.Save(FileSink(obuf).Ref());
+
+  EncryptKey<Rsa> encryptKey(std::move(*obuf.buf()));
+  return encryptKey;
+}
+
+Buffer
+Rsa::decrypt(const Buffer& keyBits, const Buffer& encryptedData, const EncryptParams& params)
+{
+  AutoSeededRandomPool rng;
+  RSA::PrivateKey privateKey;
+
+  ByteQueue keyQueue;
+  keyQueue.LazyPut(keyBits.data(), keyBits.size());
+  privateKey.Load(keyQueue);
+
+  switch (params.getPaddingScheme()) {
+  case PADDING_SCHEME_PKCS1v15:
+    {
+      RSAES_PKCS1v15_Decryptor decryptor_pkcs1v15(privateKey);
+      PK_DecryptorFilter* filter_pkcs1v15 = new PK_DecryptorFilter(rng, decryptor_pkcs1v15);
+      return crypt(filter_pkcs1v15, encryptedData);
+    }
+
+  case PADDING_SCHEME_OAEP_SHA:
+    {
+      RSAES_OAEP_SHA_Decryptor decryptor_oaep_sha(privateKey);
+      PK_DecryptorFilter* filter_oaep_sha = new PK_DecryptorFilter(rng, decryptor_oaep_sha);
+      return crypt(filter_oaep_sha, encryptedData);
+    }
+
+  default:
+    throw Error("unsupported padding scheme");
+  }
+}
+
+Buffer
+Rsa::encrypt(const Buffer& keyBits, const Buffer& plainData, const EncryptParams& params)
+{
+  AutoSeededRandomPool rng;
+  RSA::PublicKey publicKey;
+
+  ByteQueue keyQueue;
+  keyQueue.LazyPut(keyBits.data(), keyBits.size());
+  publicKey.Load(keyQueue);
+
+  switch (params.getPaddingScheme()) {
+  case PADDING_SCHEME_PKCS1v15:
+    {
+      RSAES_PKCS1v15_Encryptor encryptor_pkcs1v15(publicKey);
+      PK_EncryptorFilter* filter_pkcs1v15 = new PK_EncryptorFilter(rng, encryptor_pkcs1v15);
+      return crypt(filter_pkcs1v15, plainData);
+    }
+
+  case PADDING_SCHEME_OAEP_SHA:
+    {
+      RSAES_OAEP_SHA_Encryptor encryptor_oaep_sha(publicKey);
+      PK_EncryptorFilter* filter_oaep_sha = new PK_EncryptorFilter(rng, encryptor_oaep_sha);
+      return crypt(filter_oaep_sha, plainData);
+    }
+
+  default:
+    throw Error("unsupported padding scheme");
+  }
+}
+
+Buffer
+crypt(SimpleProxyFilter* filter, const Buffer& data)
+{
+  OBufferStream obuf;
+  filter->Attach(new FileSink(obuf));
+
+  StringSource pipe(data.get(), data.size(), true, filter);
+  return *(obuf.buf());
+}
+
+} // namespace algo
+} // namespace gep
+} // namespace ndn