Encryption method desired...

[MLH]

Here's what I would like to do from with VBA procedure
running in Access 97...

Read a plaintext file on disk (IE, autoexec.bat), encrypt
it and write it to disk (say, c:\encryptd.txt ). Recommendations
on the SIMPLEST tools possible to accomplish this. Will
be distributing in A97 runtime environment and do NOT
wish to encounter problems on remote target machines
having REFERENCE issues, etc.

Many thx N advance.

[David W. Fenton]

MLH <CR**@NorthStat e.net> wrote in
news:mp******** *************** *********@4ax.c om:

Here's what I would like to do from with VBA procedure
running in Access 97...

Read a plaintext file on disk (IE, autoexec.bat), encrypt
it and write it to disk (say, c:\encryptd.txt ). Recommendations
on the SIMPLEST tools possible to accomplish this. Will
be distributing in A97 runtime environment and do NOT
wish to encounter problems on remote target machines
having REFERENCE issues, etc.

Do a FIND for "Visual Basic" on this page:

http://userpages.umbc.edu/~mabzug1/cs/md5/md5.html

and see if the options there work. I'd definitely consider just
bundling the MD5 DLL with my runtime app and using its function
directly, assuming the licensing for it allows that.

--
David W. Fenton http://www.bway.net/~dfenton
dfenton at bway dot net http://www.bway.net/~dfassoc

[lylefair]

MLH wrote:

Will be distributing in A97 runtime environment

HMMOGBWUNAITHOO N

[Tom van Stiphout]

On Thu, 27 Oct 2005 20:52:54 -0500, "David W. Fenton"
<dX********@bwa y.net.invalid> wrote:

MD5 computes a message digest, but is not an encryption technique in
itself.

-Tom.

MLH <CR**@NorthStat e.net> wrote in
news:mp******* *************** **********@4ax. com:

Here's what I would like to do from with VBA procedure
running in Access 97...

Read a plaintext file on disk (IE, autoexec.bat), encrypt
it and write it to disk (say, c:\encryptd.txt ). Recommendations
on the SIMPLEST tools possible to accomplish this. Will
be distributing in A97 runtime environment and do NOT
wish to encounter problems on remote target machines
having REFERENCE issues, etc.

Do a FIND for "Visual Basic" on this page:

http://userpages.umbc.edu/~mabzug1/cs/md5/md5.html

and see if the options there work. I'd definitely consider just
bundling the MD5 DLL with my runtime app and using its function
directly, assuming the licensing for it allows that.

[polite person]

On Thu, 27 Oct 2005 18:28:11 -0400, MLH <CR**@NorthStat e.net> wrote:

Here's what I would like to do from with VBA procedure
running in Access 97...

Read a plaintext file on disk (IE, autoexec.bat), encrypt
it and write it to disk (say, c:\encryptd.txt ). Recommendations
on the SIMPLEST tools possible to accomplish this. Will
be distributing in A97 runtime environment and do NOT
wish to encounter problems on remote target machines
having REFERENCE issues, etc.

Many thx N advance.

1. Nothing is perfect.
2. simplest is use Winzip.
3. Use a different password for every file.
4. Use a long gibberish password.

[MLH]

Now there's an idea. Its certainly cheap enough.
Can I launch a password-based WinZip process
from VBA that will run hidden, read some text file
(MyClearTextFil e.txt) and write another file...
c:\WhatEverFile NameIwant.Desir edExtension
?

Any sample code you'd care to share or porint
out?
xxxxxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxxxxx

1. Nothing is perfect.
2. simplest is use Winzip.
3. Use a different password for every file.
4. Use a long gibberish password.

[MLH]

Dunno much about MD5 and would like to ask about the point
you made here. What is the difference between a message
digest and an encrypted message? Would a layman, for instance,
not know the difference?

Better still - what would a text file containing "Hi Tom. How are you
today?" with a CRLF appendage look like if a password of "ABCDE"
was used?
xxxxxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxx

MD5 computes a message digest, but is not an encryption technique in
itself.

-Tom.

MLH <CR**@NorthStat e.net> wrote in
news:mp****** *************** ***********@4ax .com:

Here's what I would like to do from with VBA procedure
running in Access 97...

Read a plaintext file on disk (IE, autoexec.bat), encrypt
it and write it to disk (say, c:\encryptd.txt ). Recommendations
on the SIMPLEST tools possible to accomplish this. Will
be distributing in A97 runtime environment and do NOT
wish to encounter problems on remote target machines
having REFERENCE issues, etc.

Do a FIND for "Visual Basic" on this page:

http://userpages.umbc.edu/~mabzug1/cs/md5/md5.html

and see if the options there work. I'd definitely consider just
bundling the MD5 DLL with my runtime app and using its function
directly, assuming the licensing for it allows that.

[Tom van Stiphout]

On Fri, 28 Oct 2005 09:28:21 -0400, MLH <CR**@NorthStat e.net> wrote:

A message digest is a short number (in this case 128 bits) that is
unique for this message. But given that digest, you cannot get the
plaintext back.
With an encrypted text, you (presumably) can get the plaintext back.

-Tom.

Dunno much about MD5 and would like to ask about the point
you made here. What is the difference between a message
digest and an encrypted message? Would a layman, for instance,
not know the difference?

Better still - what would a text file containing "Hi Tom. How are you
today?" with a CRLF appendage look like if a password of "ABCDE"
was used?
xxxxxxxxxxxxxx xxxxxxxxxxxxxxx xxxxxxx

MD5 computes a message digest, but is not an encryption technique in
itself.

-Tom.

MLH <CR**@NorthStat e.net> wrote in
news:mp***** *************** ************@4a x.com:

Here's what I would like to do from with VBA procedure
running in Access 97...

Read a plaintext file on disk (IE, autoexec.bat), encrypt
it and write it to disk (say, c:\encryptd.txt ). Recommendations
on the SIMPLEST tools possible to accomplish this. Will
be distributing in A97 runtime environment and do NOT
wish to encounter problems on remote target machines
having REFERENCE issues, etc.

Do a FIND for "Visual Basic" on this page:

http://userpages.umbc.edu/~mabzug1/cs/md5/md5.html

and see if the options there work. I'd definitely consider just
bundling the MD5 DLL with my runtime app and using its function
directly, assuming the licensing for it allows that.

[MLH]

Gotcha. Thx very much. I like polite person's idea.
Dunno if you looked at it. My security objective is
about as important as locking up shed if you keep
some costly tools in it. That is, I'll spring for a pad-
lock - but I'm not going to buy a used, walk-in bank
vault.

Really, I could write a routine to shuffle and cut the
string a few times - like a deck of cards. Honestly,
if I found example code posted that doessomething
like that - I'd probably just go with it.

[David W. Fenton]

Tom van Stiphout <no************ *@cox.net> wrote in
news:5v******** *************** *********@4ax.c om:

MD5 computes a message digest, but is not an encryption technique
in itself.

Excuse me? Google for "MD5 encryption" and you get lots of hits for
articles about encryption.

MD5 encryption is explained here:

http://aspnet.4guysfromrolla.com/articles/103002-1.aspx

under the topic heading "MD5 Encryption - A Brief Summary".

--
David W. Fenton http://www.bway.net/~dfenton
dfenton at bway dot net http://www.bway.net/~dfassoc