diff --git a/.gitattributes b/.gitattributes
index 602b7a6570..1c18d8bed3 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,2 +1,3 @@
 *.docx binary
 *.dll binary
+*.snk binary
diff --git a/Bson/Bson.csproj b/Bson/Bson.csproj
index 6f7026cd57..253b2cbf43 100644
--- a/Bson/Bson.csproj
+++ b/Bson/Bson.csproj
@@ -52,6 +52,12 @@
     <WarningLevel>4</WarningLevel>
     <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
   </PropertyGroup>
+  <PropertyGroup>
+    <SignAssembly>true</SignAssembly>
+  </PropertyGroup>
+  <PropertyGroup>
+    <AssemblyOriginatorKeyFile>..\Keys\TemporaryKeyPair.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
     <Reference Include="System.Core">
diff --git a/Driver/Driver.csproj b/Driver/Driver.csproj
index dacaffce3f..563dac41a7 100644
--- a/Driver/Driver.csproj
+++ b/Driver/Driver.csproj
@@ -52,6 +52,12 @@
     <WarningLevel>4</WarningLevel>
     <CodeAnalysisRuleSet>AllRules.ruleset</CodeAnalysisRuleSet>
   </PropertyGroup>
+  <PropertyGroup>
+    <SignAssembly>true</SignAssembly>
+  </PropertyGroup>
+  <PropertyGroup>
+    <AssemblyOriginatorKeyFile>..\Keys\TemporaryKeyPair.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
   <ItemGroup>
     <Reference Include="System" />
     <Reference Include="System.Core">
diff --git a/Keys/TemporaryKeyPair.snk b/Keys/TemporaryKeyPair.snk
new file mode 100644
index 0000000000..83f7b08139
Binary files /dev/null and b/Keys/TemporaryKeyPair.snk differ
diff --git a/Keys/TemporaryKeyPair.txt b/Keys/TemporaryKeyPair.txt
new file mode 100644
index 0000000000..be9976a7c7
--- /dev/null
+++ b/Keys/TemporaryKeyPair.txt
@@ -0,0 +1,4 @@
+The TemporaryKeyPair.snk file contains a temporary public/private key pair so that
+you can build signed assemblies directly from the source tree retrieved from github.
+
+The official releases will resign the DLLs with a different public/private key pair.