JACK GUEZ/AFP via Getty Images Signal CEO Moxie Marlinspike published a security analysis of Cellebrite's software. Cellebrite is a company that specializes in breaking into locked phones, and is used by law enforcement. Marlinspike says he found Cellebrite's software was full of exploitable vulnerabilities. Encrypted messaging app Signal dealt a major blow to Cellebrite, a company that specializes in breaking into locked phones. Moxie Marlinspike, Signal's CEO, published an explosive blog Wednesday detailing how he and his team managed to hack software from digital forensics firm Cellebrite. Cellebrite provides software capable of breaking into locked phones and extracting data whilst hooked up to a secondary device. It is popular with police forces, who ship off locked phones for Cellebrite to unlock for thousands of dollars.