She fights off hordes of zombies and skulls before finding the master key. There are two desirable reasons for updating the master key. There are only 7 players and one Master Key. This is especially important for master key systems with many users. SRTP relies on an external key management protocol to set up the initial master key. The key required to decrypt the master key is called the "user key". The locker was opened with a station staff master key. Both methods may be combined to create a "composite master key". Nithya provides a duplicate of the master key to Jai's cabin. They are locked by a master key, which Carson wants. Another important aspect of the Master Key System is the element of "Truth". Ultimately, the five keys join together to form a master key. A master key operates a set of several locks. In July 2013, he published an analysis and implementation of "Master Key" vulnerabilities for Android. During pairing, an initialization key or master key is generated, using the E22 algorithm.