LONDON — A coded message from World War II found on the leg of a dead carrier pigeon in an English chimney cannot be deciphered, according to British intelligence agents. The handwritten message on a ...

Many Web sites and apps now offer two-factor authentication (2FA), which requires you to enter a short numeric code—the so-called second factor—in addition to ...

Facebook, PayPal, Microsoft, Twitter, Sony, Uber, Dropbox, Amazon... the list goes on. It’s strikingly ironic—these companies are rightly pushing us to better secure our apps and services with ...

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SMS text messages are a weak, dangerous way of providing two-factor authentication codes, as we discussed years ago in “Facebook Shows Why SMS Isn’t Ideal for Two-Factor Authentication” (19 February ...