A single leaked hint exposed the CIA’s most puzzling code. But dozens of the world’s toughest ciphers are still waiting to be solved.

A coded passage in “Kryptos,” Jim Sanborn’s sculpture at CIA headquarters, has gone unsolved for decades. After he announced its auction, two researchers stumbled on the answer.

City Manager Kimberly Bizor Tolbert said Dallas is committed to working with businesses to resolve "pain points" after recent code citations.

If we become quantum tomorrow, data is lost today. Quantum comes down to size and efficiency. Current computers approach ...