Some rewording

composer.json

@@ -1,6 +1,6 @@
 {
     "name": "privatebin/privatebin",
-    "description": "PrivateBin is a minimalist, open source online pastebin where the server has zero knowledge of pasted data. Data is encrypted/decrypted in the browser using 256 bit AES in Galois Counter mode.",
+    "description": "PrivateBin is a minimalist, open source online pastebin where the server has zero knowledge of pasted data. Data is encrypted/decrypted in the browser using 256 bit AES in Galois Counter mode (GCM).",
     "repositories": [
         {
             "type": "vcs",

robots.txt

@@ -1,4 +1,9 @@
-# Might as well keep robots away for performance and privacy reasons.
+# "A robots.txt a day keeps the robots away."
+# (for performance and privacy reasons)
+#
+# Note: To be effective this robots.txt must be put into the root of your server
+# directory.
+
 User-agent: *
 Allow: /index.php
 Disallow: /