When Himani Mehta signed up on Tinder in 2016, she discovered a world where lying was rampant. Almost no one used their real photos — a few had gym selfies or a customary travel picture, though — and it was difficult for her to trust anyone there. More often than not, she would find an unsolicited dick pic in her messages. Exasperated, she deleted her account. Mehta is not alone in feeling ditched by these apps. Now, an unlikely tech fix is promising to help the dating app industry regain their trust: the marriage of blockchain with artificial intelligence.