Checking for fraud - C# / C Sharp

Patrick De Ridder

My question has to do with checking whether someone is fraudulently messing
about with data.
*********************************************

Given a field, say fieldString
I want to add a character
fieldString += invisibleCharacter;
I want to do that when data in any record is changed by the user
I don't want invisibleCharacter to display on the screen but I do want to
be able to check if invisibleCharacter is present in fieldString: what
character could invisibleCharacter be? (I need about four different
characters to indicate what has been changed.)

There is no spare room in the record to add a digit. Also the application is
up and running.

Patrick.

Nov 15 '05 #1

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1123

Rob Teixeira [MVP]

When you say "record", where exactly is this record being stored?
Rule #1 in Rob's data rulebook - NEVER use one peice of data to mean two
completely different things.
If you want an audit, checksum, or hash field, mysuggestion is create a
seperate field.

-Rob Teixeira [MVP]

"Patrick De Ridder" <wn********@all.here> wrote in message
news:10***************@evisp-news-01.ops.asmr-01.energis-idc.net...

My question has to do with checking whether someone is fraudulently messing about with data.
*********************************************

Given a field, say fieldString
I want to add a character
fieldString += invisibleCharacter;
I want to do that when data in any record is changed by the user
I don't want invisibleCharacter to display on the screen but I do want to
be able to check if invisibleCharacter is present in fieldString: what
character could invisibleCharacter be? (I need about four different
characters to indicate what has been changed.)

There is no spare room in the record to add a digit. Also the application is up and running.

Patrick.

Nov 15 '05 #2

Patrick De Ridder

Hi Rob,

Thank you. That obviously makes total sense. I need
another field, which I cannot conjure up because the
application is running with data and I cannot change
the record lay-out any more. I will look for a different
solution.

Patrick.

"Rob Teixeira [MVP]" <RobTeixeira@@msn.com> wrote in message
news:e2**************@TK2MSFTNGP11.phx.gbl...

<snip>
Rule #1 in Rob's data rulebook - NEVER use one peice of data to mean two
completely different things.
<snip>

Nov 15 '05 #3

Patrick De Ridder

"Rob Teixeira [MVP]" <RobTeixeira@@msn.com> wrote in message
news:e2**************@TK2MSFTNGP11.phx.gbl...

Apologies for asking: what does MVP mean?

Patrick.

Nov 15 '05 #4

Jon Skeet [C# MVP]

Patrick De Ridder <wn********@all.here> wrote:

"Rob Teixeira [MVP]" <RobTeixeira@@msn.com> wrote in message
news:e2**************@TK2MSFTNGP11.phx.gbl...

Apologies for asking: what does MVP mean?

It's Microsoft's "Most Valuable Professional" program. See
http://mvp.support.microsoft.com for more information. (Admittedly that
site doesn't seem to be working at the moment, but I'm sure it will be
in a bit.)

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

Nov 15 '05 #5

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