On Wed, Mar 09, 2011 at 19:50 -0800, you wrote: > (could just take the bottom 64 bits of the MD5 here) Sure, but I was trying to avoid the MD5 altogether. Robin -- Robin Sommer * Phone +1 (510) 722-6541 * robin at icir.org ICSI/LBNL * Fax +1 (510) 666-2956 * www.icir.org