Add crypto notice
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Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
specific language governing permissions and limitations under the License.
+
+# Crypto Notice
+
+This distribution includes cryptographic software. The country in which you
+currently reside may have restrictions on the import, possession, use, and/or
+re-export to another country, of encryption software. BEFORE using any
+encryption software, please check your country's laws, regulations and
+policies concerning the import, possession, or use, and re-export of encryption
+software, to see if this is permitted. See [http://www.wassenaar.org] for
+more information.
+
+The Apache Software Foundation has classified this software as Export Commodity
+Control Number (ECCN) 5D002, which includes information security software using
+or performing cryptographic functions with asymmetric algorithms. The form and
+manner of this Apache Software Foundation distribution makes it eligible for
+export under the "publicly available" Section 742.15(b) exemption (see the BIS
+Export Administration Regulations, Section 742.15(b)) for both object code and
+source code.
+The following provides more details on the included cryptographic software:
+* [Bouncy Castle](http://bouncycastle.org/)
+* [Apache Tuweni crypto](./crypto)
