The Twenty-first Cambridge International Workshop on Security Protocols will be held in the Mong Room at Sidney Sussex College, Cambridge.
Information about Cambridge can be found at http://www.visitcambridge.org/
There are several options how to get to Cambridge.
The college is located in the centre of Cambridge. They provide a useful map and directions, but you will probably want to find your accommodation first!
Accommodation is not included in the workshop fee. A good list of accommodation is provided at http://www.smoothhound.co.uk/cambridg.html.
The college has a limited amount of accommodation available for delegates, but no en suite rooms are available. Contact their conference office if you are interested; the Conference and Events Manager is Mrs Marianne Oyler (+44 1223 338850 OR conference AT sid.cam.ac.uk).