diff --git a/pkgs/development/libraries/pkcs11helper/default.nix b/pkgs/development/libraries/pkcs11helper/default.nix
new file mode 100644
index 000000000000..5443df89704d
--- /dev/null
+++ b/pkgs/development/libraries/pkcs11helper/default.nix
@@ -0,0 +1,24 @@
+{ stdenv, fetchurl, pkgconfig, openssl, autoconf, automake, libtool }:
+
+let
+  rev = "5d412bad60";
+in
+stdenv.mkDerivation rec {
+  name = "pkcs11-helper-20121123-${rev}";
+  
+  src = fetchurl {
+    url = "https://github.com/alonbl/pkcs11-helper/tarball/${rev}";
+    name = "${name}.tar.gz";
+    sha256 = "1mih6mha39yr5s5m18lg4854qc105asgnwmjw7f95kgmzni62kxp";
+  };
+
+  preConfigure = "autoreconf -vfi";
+  
+  buildInputs = [ pkgconfig openssl autoconf automake libtool ];
+
+  meta = {
+    homepage = https://www.opensc-project.org/opensc/wiki/pkcs11-helper;
+    license = [ "BSD" "GPLv2" ];
+    description = "Library that simplifies the interaction with PKCS#11 providers";
+  };
+}
diff --git a/pkgs/tools/security/meo/default.nix b/pkgs/tools/security/meo/default.nix
new file mode 100644
index 000000000000..e18b68c7593f
--- /dev/null
+++ b/pkgs/tools/security/meo/default.nix
@@ -0,0 +1,34 @@
+{ stdenv, fetchhg, openssl, pcre, qt4, boost, pkcs11helper }:
+
+stdenv.mkDerivation {
+  name = "meo-20121113";
+  
+  src = fetchhg {
+    url = http://oss.stamfest.net/hg/meo;
+    tag = "b48e5f16cff8";
+    sha256 = "0ifg7y28s89i9gwda6fyj1jbrykbcvq8bf1m6rxmdcv5afi3arbq";
+  };
+
+  buildFlags = "QMAKE=qmake";
+
+  buildInputs = [ openssl pcre qt4 boost pkcs11helper ];
+
+  preConfigure = ''
+    sed -i s,-mt$,, meo-gui/meo-gui.pro
+  '';
+
+  installPhase = ''
+    ensureDir $out/bin
+    cp tools/{meo,p11} $out/bin
+    cp meo-gui/meo-gui $out/bin
+    cp meo-gui/meo-gui $out/bin
+  '';
+
+  meta = {
+    homepage = http://oss.stamfest.net/wordpress/meo-multiple-eyepairs-only;
+    description = "Tools to use cryptography for things like four-eyes principles";
+    license = "AGPLv3+";
+    maintainers = with stdenv.lib.maintainers; [viric];
+    platforms = with stdenv.lib.platforms; linux;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index fd7b09dd4fd7..d3c5f57ede45 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -1155,6 +1155,8 @@ let
 
   memtest86plus = callPackage ../tools/misc/memtest86/plus.nix { };
 
+  meo = callPackage ../tools/security/meo { };
+
   mc = callPackage ../tools/misc/mc { };
 
   mcabber = callPackage ../applications/networking/instant-messengers/mcabber { };
@@ -4855,6 +4857,8 @@ let
 
   physfs = callPackage ../development/libraries/physfs { };
 
+  pkcs11helper = callPackage ../development/libraries/pkcs11helper { };
+
   plib = callPackage ../development/libraries/plib { };
 
   pocketsphinx = callPackage ../development/libraries/pocketsphinx { };