diff --git a/ndn-cpp/util/blob.hpp b/ndn-cpp/util/blob.hpp
new file mode 100644
index 0000000..ed28fe5
--- /dev/null
+++ b/ndn-cpp/util/blob.hpp
@@ -0,0 +1,77 @@
+/**
+ * @author: Jeff Thompson
+ * See COPYING for copyright and distribution information.
+ */
+
+#ifndef NDN_BLOB_HPP
+#define	NDN_BLOB_HPP
+
+#include "../common.hpp"
+
+namespace ndn {
+
+/**
+ * A Blob holds a pointer to an immutable byte array.
+ */
+class Blob {
+public:
+  /**
+   * Create a new Blob with an immutable copy of the given array.
+   * @param value A pointer to the byte array which is copied.
+   * @param valueLength The length of value.
+   */
+  Blob(const unsigned char* value, unsigned int valueLength)
+  : value_(new std::vector<unsigned char>(value, value + valueLength))
+  {
+  }
+  
+  /**
+   * Create a new Blob with an immutable copy of the array in the given vector.
+   * @param value A reference to a vector which is copied.
+   */
+  Blob(const std::vector<unsigned char> &value)
+  : value_(new std::vector<unsigned char>(value))
+  {
+  }
+  
+  /**
+   * Create a new Blob to point to an existing byte array.  IMPORTANT: After calling this constructor,
+   * you must treat the array as immutable and promise not to change it.
+   * @param value A pointer to a vector with the byte array.  This takes another reference and does not copy the bytes.
+   */
+  Blob(const ptr_lib::shared_ptr<std::vector<unsigned char> > &value)
+  : value_(value)
+  {
+  }
+  
+  /**
+   * Return a const reference to the immutable byte array.
+   */
+  const std::vector<unsigned char>& getValue() const
+  {
+    return *value_;
+  }
+
+  /**
+   * Return the length of the immutable byte array.
+   */
+  unsigned int size() const
+  {
+    return value_->size();
+  }
+
+  /**
+   * Get const pointer to the first byte of the immutable byte array.
+   */
+  const unsigned char* buffer() const
+  {
+    return &value_->front ();
+  }
+  
+private:
+  ptr_lib::shared_ptr<std::vector<unsigned char> > value_;
+};
+
+}
+
+#endif