Invalid filename char in serial number

[Steve Snyder]

Hello.

The WARNING file from the ekeyd v1.1.3 package says to do this for 
RHEL5/Centos5:

[root at centos5 ~]# mkdir -p /var/run/entropykeys
[root at centos5 ~]# ekey-ulusbd -b002 -d007 
-p/var/run/entropykeys/keyserialnumber 
-P/var/run/ekey-ulusbd-keyserialnumber.pid -D

Hmmmm.  Yes, well, my serial number has a '/' character in it, which 
precludes using it as a file or directory name.

What to do?

Thanks.