A team of academics has detailed this week a vulnerability in the Voice over LTE (VoLTE) protocol that can be used to break the encryption on 4G voice calls.
Named ReVoLTE, researchers say this attack is possible because mobile operators often use the same encryption key to secure multiple 4G voice calls that take place via the same base station (mobile cell tower)...
Researchers say that the equipment to pull off a ReVoLTE attack costs around $7,000. While the price might seem steep, it is certainly in the price range of other 3G/4G mobile interception gear, usually employed by law enforcement or criminal gangs...
A scientific paper detailing the ReVoLTE attack is also available for download as PDF from here and here. The paper is titled "Call Me Maybe: Eavesdropping Encrypted LTE Calls With ReVoLTE." more
