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RT @matthew_d_green: Big piece on SS7 vulnerabilities and cellphone tracking. washingtonpost.com/business/technology/how-spies-can-use-your-cellphone-to-find-you--and-eavesdrop-on-your-calls-and-texts-too/2018/05/30/246bb794-5ec2-11e8-a4a4-c070ef53f315_story.html