RE: [xml-dev] Slides from "Web Services Security Issues"

[Jimmy Zhang <jzhang2004@sbcglobal.net>]

CPU power and battery are actually two closely related issues.

Years ago I came across a problem concerning low power design

methodolgy.

To lower the power consumption of an application, one can resort to

(1) State of the art IC fabrication technoloy (smaller transistors)

(2) Fancy gate design

(3) Use efficient clocking methodology (clock signial delivery is a

    major power consumer) and routing interconnections  
(4) Use optimized algorithm (bubble sort VS quick sort)

 

It turns out that whle all those options contributes to lower power,

4 is the most effective. 1, 2, 3 and 4 happens at different abstract

levels.

 

A holistic optimization approach should start from 4. Better

algorithms led to less number of cycles, tranlating to less power.

 

 

"Bullard, Claude L (Len)" <len.bullard@intergraph.com> wrote:

Does encryption and digital signing increase the need for bandwidth or
the need for CPU power and battery life? Of those, the second one
seems to be the harder problem.

len


From: Ken North [mailto:kennorth@sbcglobal.net]

Jimmy Zhang wrote:
< Also consider how fast the network bandwidth is being commoditized.
< 10Ge, 802.11n (150mb) WLAN, and 802.16 (Ultra wide band), MMDS.
< Event wireless bandwidth is growing rapidly.

But there's also growth in the number of XML applications, such as critical
web
services, that will be using encryption and digitally-signed documents. The
increase in bandwidth will be offset (for some applications) by the
additional
processing overhead for exchanging secure documents.

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