Richard Walker still remembers back when he was general counsel and then head of the Enforcement Division at the U.S. Securities and Exchange Commission. During that time, the agency introduced computers and Walker treated his like a big paperweight.

But eventually all financial transactions moved to the web—as did the fraud. And Walker, who recently joined King & Spalding’s government investigations group in New York, said he found himself “ trying to keep pace with the growth of fraudulent activity on the internet. Everything now is web-based, including trading and fraudulent schemes.”