It is important to distinguish between security and uniqueness. A part offering a large number of addresses will have increased uniqueness meaning there will be little potential for two devices in proximity unintentionally having the same address. Security might be thought of as the mechanisms whereby the encoder and decoder relationship is protected against attack. Typically, the encoding of each transmission changes based on complex encryption algorithms. This makes it extremely difficult to predict what the next code will be and is designed to prevent someone from replicating a transmission. If an application is not concerned with the potential for malicious grabbing of a transmission but needs to ensure that there is little chance of two devices in proximity having the same address, a unique product such as the MS Series is an ideal choice. If it is absolutely necessary to prevent an unauthorized activation of a system, then a secure product such as the HS Series is required.