[IIS+PHP] Securing log.txt files

i have logs stored from a PHP script to mysite.com/mylogs/log.txt
so in order to store the logs i shld give write permission and read permisson for Internet Guest account to log.txt

and i do not want the public users access to the log.txt so how can i set permissions in order to store logs this way and make it inaccesible by public.
Is there any other way other that storing the logs in DB or storing the logs not in wwwroot folder

use htaccess and htpasswd

iis does not have that function i believe

[ame]http://en.wikipedia.org/wiki/Htaccess[/ame] Look at that.

http://support.microsoft.com/kb/324064