[AccessD] Encryption

Thanks Guys, I'll check it out!!

Robert Gracie

-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com]On Behalf Of Gustav Brock
Sent: Wednesday, January 07, 2004 2:45 AM
To: Access Developers discussion and problem solving
Subject: Re: [AccessD] Encryption


Hi Robert and Stuart

Lookup my message:

  Re: [AccessD] Encryption/decryption (was: Registration Techniques)

from 2002-09-18 for a complete high-speed PC1 Access 97 module. Should
work for A2000/2003 as well.
That said, a PowerBasic dll would probably run way faster ...

/gustav


>>  Instead of re-inventing the wheel here, does anyone have some code that
>> will allow me to pull the body of an e-mail (or a very large string even)
>> and encrypt it with out first writing it to a text file? I've tried three
>> different cipher routines, but they all want to break up the String. So
I'm
>> left with only the first section in the string....
>>
> How large is large?

> Here are  some routines that use PC1 (see
> http://membres.lycos.fr/pc1/)

> Theorectically, it will handle any length of string up to 1/2 the
> maximum allowable string length for your development environment.
> (The encryted string is always exactly twice as large as the
> original.)

> This VBA versions works fairly well up to about 30 - 40K on my PC
> (1 -2 secs to encode, virtually instantaneous decode), but as the
> original string gets bigger, it takes *a lot*  longer to encrypt.
> (70K = 12 secs, 80K = 22 secs, 90K = 38 secs etc but decrypt is still
> only about 3 secs at 90K).

> If you want to use larger strings, I can let you have a DLL version
> of this which I built in PowerBasic. It is *much* faster

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