From f7030863a2993302f7c74327d700f1da3e8d2900 Mon Sep 17 00:00:00 2001
From: Tatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>
Date: Sat, 24 Aug 2019 22:31:16 +0900
Subject: [PATCH] Update doc

---
 README.rst | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/README.rst b/README.rst
index 287461b9..feda5737 100644
--- a/README.rst
+++ b/README.rst
@@ -114,6 +114,18 @@ packet pretty small because it does not send its certificates.
 To send 0-RTT data, after making sure that resumption works, use -d
 option to specify a file which contains data to send.
 
+Crypto helper library
+---------------------
+
+In order to make TLS stack integration less painful, we provide a
+crypto helper library which offers the basic crypto operations.
+
+The header file exists under crypto/includes/ngtcp2 directory.
+
+The library file is built for a particular TLS backend.  At the
+moment, libngtcp2_crypto_openssl which uses OpenSSL as TLS backend is
+provided.
+
 License
 -------
 
-- 
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