…consider it to be in the past(1923-1999, 2000-2011). This solution has two advantages. First, no new fixed year problems are introduced. Second, different applications and protocols could choose different values of N. The drawback is that this solution is harder to implement, and…

… . . . . . . . . . . 140 6.1 Left: WideNoise version 1.0/2.0 created by the WideTag company in 2009. Right: WideNoise version 3.0 as licensed and redesigned for use in the Ev- eryAware academic research project in 2011 (EveryAware 2012a). . . . . . . . 143 8 Contents 6.2 Conceptu…