diff -r 088e25408bf9 -r 52fcc247be02 data/dictionary.xml
--- a/data/dictionary.xml	Wed Aug 14 00:06:55 2013 +0200
+++ b/data/dictionary.xml	Wed Aug 14 00:34:35 2013 +0200
@@ -788,7 +788,19 @@
 		<term abbreviation="" completeForm="de-aliasing" language="en"/>
 		<term abbreviation="" completeForm="dealiasing" language="en"/>
 		<term abbreviation="" completeForm="hashing" language="en"/>
-		<explanation language="en"><text></text></explanation>
+		<explanation language="en">
+			<text>
+				when a subscriber communicates with an application (MOAT/AOMT messaging)
+				he might not want expose his identity (MSISDN or IMSI);
+				the aliasing feature (sometimes called hashing) deployed on an SMS gateway enables this communication and rewrites the subscriber's ID to some generated ID;
+				the application can then send a response on a message without knowing subscriber's identity (on the gateway the ID is translated back to real ID – de-aliasing);
+				use case:
+					subscribers can vote in some survey,
+					everyone will have one vote,
+					but the owner of the survey will not know the opinion of particular subscibers
+					because of missing their real IDs
+			</text>
+		</explanation>
 		<tag>security</tag>
 		<tag>messaging</tag>
 	</concept>