diff --git a/README.md b/README.md
index fae5a4a..d3b6574 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,9 @@
 # CpUpES2-Decrypt
-A tool to decrypt "UpdaterES2.CpUp"
+A tool to decrypt "UpdaterES2.CpUp" from PSVita DevKit Update Files
+
+Made possible by Zecoaxco and VVildCard777 for dumping the CP EMMC. 
+And Mathieulh for helping me with stuffs, and answering all my stupid questions.
+
+Output is a tar.gz file, where fsimage1.trf is encrypted, and fsimage0.trf is signed (but unencrypted) AXFS file-system image.
+
+fsimage decryption : <to-be-developed>