poiuytrez/AndroidInAppBilling — pull request #22 by ramtel2005 (2013-10-22 07:51:54+00:00)
Title: Google Play Merchant In-app Billing Sample Code Security Update

Google recently discovered some exploitable flaw in their sample code, now its fixed, they changed two files IabHelper.java and Security.java

ref url:
https://code.google.com/p/marketbilling/source/detail?r=7bc191a004483a1034b758e1df0bda062088d840