http://www.cl.cam.ac.uk/~mkb23/research/Chrysalis.pdf
Edit: And the final report: http://www.cl.cam.ac.uk/techreports/UCAM-CL-TR-592.pdf
Which says it took 7 months to do the reversing.
http://www.cl.cam.ac.uk/~mkb23/research/Chrysalis.pdf
Edit: And the final report: http://www.cl.cam.ac.uk/techreports/UCAM-CL-TR-592.pdf
Which says it took 7 months to do the reversing.