Whitepaper called Indexed Blind SQL Injection. Time based blind SQL attacks suffer from low bit/request ratios. Each request produces only one valuable bit of information. This paper describes a tweak that produces higher yield at the expense of a longer runtime. Along the way, some issues and notes of applicability are also discussed.
84e74daa46ea6185f1c1f4ee9764bc2315f2a4cf39e46f8dfcea99039a5ecb21