News bites: Court upholds warrantless cellphone tracking

The Justice Department has acknowledged that the government should tell defendants when surveillance has been used to build a terrorism case against them, according to The Wall Street Journal.

National Security Agency Director Gen. Keith Alexander will deliver an address to hackers at the Black Hat conference in Las Vegas, Nev., on Wednesday, The Associated Press says.

Google is caught between getting users to share more data about themselves and avoiding a repeat of previous missteps on privacy, The Wall Street Journal writes.

EU antitrust regulators asked Google rivals about whether their lower rankings on the company's search product resulted in a decrease in the number of visitors to their websites, Reuters reports.