Yahoo’s reported willingness to search user email to assist U.S. government investigators has revived concerns about court-approved surveillance programs that companies aren’t allowed to disclose to the people using their services. Last year, Yahoo modified an existing version of its email security program to flag the appearance of a digital “signature” the U.S. had linked…

NEW YORK (AP) — The deadly attacks in Paris may soon reopen the debate over whether — ?and how? — tech companies should let the government sidestep the data scrambling that shields everyday commerce and daily digital life alike. So far, there’s no hard evidence that the Paris extremists replied on encrypted communications ?— essentially,…