Network security on multiple levels (was Re: NYT covers China cyberthreat)

[surfer at mauigateway.com (Scott Weeks)]

--- smb at cs.columbia.edu wrote:
From: Steven Bellovin <smb at cs.columbia.edu>

An amazing percentage of "private" lines are pseudowires, and neither you nor 
your telco salesdroid can know or tell; even the "real" circuits are routed 
through DACS, ATM switches, and the like.  This is what link encryptors are 
all about; use them.  
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I would sure be interested in hearing about hands-on operational
experiences with encryptors.  Recent experiences have left me 
with a sour taste in my mouth.  blech!

scott