In AC 1, Lucy mentions the story of how she was a graduate student with a controversial thesis and was dropped by the university because they thought it was pseudoscience. Then after some amount of time she was contacted by Vidic with a placement at abstergo. She mentions that had been monitoring her since undergrad which may be something like 4-6 years. According to the wikia in 2012 she is 24 (kinda seems too young) which puts her last point of contact with Rebecca at 17 years. Now she spent three years in the animus project developing interfaces and designs so that would have been before subject 15 was in the animus. My question is when approximately did she join the assassins? Before abstergo contacted her? It would seem so as she had already been to the assassins HQ and I can't imagine her getting their during her time at abstergo. Seems like she was the seed of the assassins' efforts of infiltration. Hmmaybe revelations will answer this because it feels like it has something to do with the assassins finding Desmond.