The Intercept reveals that GCHQ and NSA collaborated to hack into the internal networks of Gemalto, the largest manufacturer of SIM cards in the world. The spy agencies, led by GCHQ, stole the cellular encryption keys that are used to encrypt cellphone communications across the globe. The Intercept writes: "With these stolen encryption keys, intelligence agencies can monitor mobile communications without seeking or receiving approval from telecom companies and foreign governments. Possessing the keys also sidesteps the need to get a warrant or a wiretap, while leaving no trace on the wireless provider’s network that the communications were intercepted. Bulk key theft additionally enables the intelligence agencies to unlock any previously encrypted communications they had already intercepted, but did not yet have the ability to decrypt."