diff --git a/webcrypto/WebCrypto.d.ts b/webcrypto/WebCrypto.d.ts
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+++ b/webcrypto/WebCrypto.d.ts
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+// Type definitions for WebCrypto
+// Project: http://www.w3.org/TR/WebCryptoAPI/
+// Definitions by: Lucas Dixon <https://github.com/iislucas/>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module crypto {
+
+   // A cryptographically strong pseudo-random number generator seeded with
+   // truly random values. The buffer passed in is modified, and a reference to
+   // argument is returned for convenience.
+   function getRandomValues(array: ArrayBufferView) : ArrayBufferView
+
+}
diff --git a/webcrypto/readme.md b/webcrypto/readme.md
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+++ b/webcrypto/readme.md
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+#  WebCrypto Definition Notes
+
+## The WebCrypto specification
+
+The WebCrypto specification is for performing basic cryptographic operations in
+web applications, such as hashing, signature generation and verification, and
+encryption and decryption. The API is also for applications to generate and/or
+manage the keying material necessary to perform these operations. Uses for this
+API range from user or service authentication, document or code signing, and the confidentiality and integrity of communications.
+
+The latest version of the specification can be found at: http://www.w3.org/TR/WebCryptoAPI/
+
+## Adding the reference to your project
+
+```
+/// <reference path="WebCrypto.d.ts" />
+```