Photos: Pope Francis’ Last Journey

By plane and boat, on foot and in an electric popemobile, Pope Francis traveled year after year of his papacy, reaching dozens of countries on five continents. His first official trip outside Rome was in 2013 to Lampedusa, a tiny Mediterranean island that had became a gateway for migrants. Not long afterward, he flew into…

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Chatbots can hide secret messages in seemingly normal conversations

Encrypted messages could be hidden within a normal-looking conversation on social media Tero Vesalainen/iStockphoto/G​etty Images Secret messages can be hidden inside fake conversations generated by AI chatbots. The technique could give people a way to communicate online without arousing the suspicion of oppressive governments. When messages are encrypted for secure transmission, the resulting cipher text…

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