Add a note about cryptography

Fixes #48

CRYPTOGRAPHY.md

@@ -0,0 +1,15 @@
+# Cryptographic features of Fedora Media Writer
+
+There are two separate checksum validation processes integrated in the Fedora Media Writer.
+
+## SHA256 hash
+
+All Fedora images (except Atomic) have a SHA256 hash assigned when created. This hash is included in the release metadata that's included in Fedora Media Writer and also in the releases.json file that's provided as a part of Fedora Websites and served over HTTPS.
+
+Fedora Media Writer then computes SHA256 hash of the ISO data being downloaded to check if the image is counterfeit or not.
+
+## Integrated MD5 ISO checksum
+
+All Fedora ISO images have an integrated MD5 checksum for integrity purposes.
+
+Fedora Media Writer verifies this checksum right after the image is downloaded and also after the image has been written to a flash drive to verify if it has been written correctly.

README.md

@@ -49,3 +49,7 @@ To release a standalone package, use `macdeployqt`, supplied with your Qt instal
 If you want to help with translating Fedora Media Writer, please visit our [Zanata project page](https://fedora.zanata.org/iteration/view/mediawriter/master).
 
 Information about the individual Fedora flavors are retrieved from the websites and translated as a separate project.
+
+## Other information
+
+For details about cryptography, see [CRYPTOGRAPHY.md](CRYPTOGRAPHY.md).

dist/win/build.sh

@@ -60,7 +60,8 @@ fi
 if [ "$1" == "local" ]; then
     echo "=== Building"
     mingw32-qmake-qt5 ..
-    mingw32-make -j9 >/dev/null
+
+    mingw32-make -j9 
 else
     mkdir -p "app/release"
     echo "=== Getting distribution binary"