Maarten Boekhold writes ("exmh and Xauthority"):
...
> # Generate a random key; Mui and Pearce offer a number of alternatives
> # for this.
> randomkey=`perl -e 'srand; printf int(rand(100000000000000000))'`
Do NOT do this. It results in a weak cookie, meaning that someone
could fairly easily guess your cookie and take over your session and
account.
There are ways of getting a good cookie. This isn't one.
Ian.