On Sat, Apr 05, 2008 at 02:01:29PM +0400, .FUF wrote: > Firefox sends your uptime in "gmt_unix_time" field (seconds since boot). > Other browsers (IE, Opera) send your current system time in UNIX format.
Even sending the current system time is somewhat troublesome, since small inaccuracies may be likely to remain relatively constant over long periods, allowing an attacker to observe, for example, which machine is twenty seconds slow. Not sure about to what extent running NTP ameliorates this. Geoff
