Started novel

README.md

@@ -1,2 +1,14 @@
-# yacd
+# yacd (Yet Another Code Decrypter)
+
 Decrypts FairPlay applications on iOS 13.4.1 and lower, no jb required 
+
+This application uses [@s1guza](https://twitter.com/s1guza)'s [Psychic Paper](https://siguza.github.io/psychicpaper/) exploit to be able to read other process memory and the iOS filesystem.
+
+Many alternatives already exist ([origina?](https://github.com/stefanesser/dumpdecrypted), [Frida version](https://github.com/AloneMonkey/frida-ios-dump), [past favorite](https://github.com/BishopFox/bfdecrypt)). This was written primarily for a case where I want to get a decrypted IPA from a GUI without SSH'ing into a jb'd device.
+
+
+## Compile 
+Change around the Singing identity and build for an iOS 13.4.1 or lower device. If successful, you'll see the list of GUI applications on your iOS device.
+
+## Usage
+First launch a 3rd party application, then decrypt it from the yacd app