Worried About the Privacy of Your Messages? Download Signal.

By the time you finish reading this column, you would be foolish not to download the messaging app Signal onto your smartphone and computer. The free encrypted messaging service has won the acclaim of security researchers and privacy advocates, including Edward J. Snowden. All have said that Signal goes above and beyond other chat tools in keeping electronic communications private. And now more than ever, we may need it. That’s because hacks are on the rise — look at how the activist group WikiLeaks posted a trove of e-mails from Hillary Clinton’s campaign chairman, John D. Podesta, for all to see.

Many are also watching for how government surveillance may grow under Donald J. Trump, who has chosen Mike Pompeo, who advocates greater surveillance, to lead the Central Intelligence Agency. Signal is one of many encrypted messaging services, but it stands out for its uncompromising security and ease of use. The chat service retains virtually no information from users, including messages and address books, on its servers. What’s more, messages remain encrypted when passing through Signal’s servers, meaning that the app’s creators can’t read them.