ksh executing a file without read permission

[Suu Quan]

Ksh question:

In "The KORN shell Command and Programming language", by Bolsky & Korn,
Part I INTRODUCTION, page 6.

	"BETTER SECURITY. Ksh allows a system administrator to log and/or
	disable all priviledged scripts. On current UNIX systems, users need
	read permission to execute a script. With ksh, a system administrator
	can allow ksh to read and execute a script without giving a user
	permission to read it"

Exactly what I want : have a file with permissions --x--x--x
and have everyone execute it without being able to read it.


I (actually 2 of us) cannot find in the whole book how this could be done.

How do you do it ?
-- 
Suu Quan  (TELNET/415) 857-3594			quan at hpcmfs.corp.HP.COM
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