"Carmen Sandiego Returns" is an app launched Thursday.

It has been 30 years since a certain iconic childhood villain first simultaneously taught geography, math, civics, and language arts while going on adventures and creating chaos. On Thursday Boston’s Houghton Mifflin Harcourt Co. brings Carmen Sandiego to the small screen, launching an iOS app version of the character who has starred in a long-running computer game and public television series.More →


Intelligence agencies and lawmakers warn that the use of encryption on digital devices makes it much harder to observe terrorist activities. The only solution, they say, is a system of “back doors” that would unlock encryption programs. But that would weaken global demand for US technology products and make life easier for cyber-criminals. More →