IPP> FW: PC Week Web server security spec gaining support
IPP> FW: PC Week Web server security spec gaining support
Manros, Carl-Uno B
cmanros at cp10.es.xerox.com
Tue Jun 29 13:00:33 EDT 1999
FYI,
Carl-Uno
-----Original Message-----
From: Carl-Uno Manros [mailto:carl at manros.com]
Sent: Monday, June 28, 1999 8:35 PM
To: manros at cp10.es.xerox.com
Subject: PC Week Web server security spec gaining support
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Web server security spec gaining support
By Scot Petersen and Jim Kerstetter, PC Week Online
June 28, 1999 9:00 AM ET
A security specification garnering the attention of users and vendors
promises to improve Web server defenses and reduce encryption loads.
The Internet Engineering Task Force published the latest version of the
HTTP/1.1 Message Digest Authentication spec this month. The technology
protects Web servers with an RSA Data Security Inc. MD5 "hash" algorithm
method, ensuring that passwords--which hackers and sniffer software now can
detect fairly easily--can't be deciphered.
Digest Authentication also will allow site managers to be more selective in
their use of encryption and enable them to limit SSL (Secure Sockets Layer)
sessions to data that truly needs to be protected. SSL sessions are
processor-intensive and, as a result, can slow down servers.
"Today all you really have is a clear-text challenge response. It's easy to
hack into or crack," said Peter Mellquist, architect in the network
peripheral solutions division of Hewlett-Packard Co., in Roseville, Calif.
"When authentication occurs and moves across the wire, anyone can pick that
up. [Digest Authentication] moves as a hash of the password and user name,
which is not discernible."
HP is supporting Digest Authentication in its line of Internet-enabled
printers. The company will use Agranat Systems Inc.'s EmWeb 5.1 embedded Web
server engine, which will ship this week with added support for the newest
version of the security specification.
Microsoft Corp. also is supporting the technology in Internet Explorer 5.0
and the forthcoming Internet Information Server 5.0, which will ship as part
of Windows 2000 later this year.
The only thing stopping widespread adoption of the spec is support across
all browsers and servers.
"Our Apache server [Version 1.3.6] already supports Digest Authentication,"
said Stefan Winz, director of commerce technology at TheStreet.com, in New
York. "The problem is there's been no support for it on [all] browsers. If
they did, we'd definitely think about using it."
Netscape Communications Corp., in Mountain View, Calif., does not support
Digest Authentication in its browsers and Web servers. While officials
declined to offer an explanation, sources said Netscape has been reluctant
to support the technology because developers are concerned that it leaves
password databases vulnerable to attack on Web servers.
Digest Authentication was created more than two years ago, but the IETF
recently added corrections that make the specification easier to implement,
said Scott Lawrence, director of research and development at Agranat, of
Maynard, Mass., and a co-author of the specification.
What it does not do is encrypt traffic. It merely hides passwords. Still,
for sites that use SSL encryption--often when they don't really need
to--password hashing could lead to better use of encryption and less overall
loads on servers.
When users of BMG Direct Inc., in New York, want to protect their passwords,
for example, they must establish an SSL connection, said Elizabeth Rose,
vice president of strategic development and e-commerce.
"Much of that information doesn't really need to be encrypted," Rose said,
"but we still give them that option."
How Message Digest Authentication works
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