Internet security takes a hit Report says computer-code experts concerned after flaw discovered in popular encryption technique. NEW YORK (CNN/Money) - The discovery of a crack in a commonly used Internet encryption technique raised concerns among government agencies and computer-code experts, according to a report by The Wall Street Journal. "Our heads have been spun around," Jon Callas, chief technology officer at encryption supplier PGP Corp., told the newspaper. The technique, called a "hash function," has been commonly used by Web site operators to scramble online transmissions containing credit-card information, Social Security numbers and other personal information. Hash functions were...