Bluetooth 2.0 added Enhanced Data Rate (EDR). It brought
the higher connection speeds, improved performance, and less
power consumption. All Bluetooth versions up till 2.0 use the
same insecure pairing process for which various weaknesses
have been detected previously. Thus, in 2007, Bluetooth 2.1
introduced the Secure Simple Pairing (SSP) mechanism, a new
pairing mechanism designed to prevent the known attacks,
requires even lower power consumption, and offers more
security.