Encryption and protection

[Thomas McGrath III]

Bill,

1. I have heard that the 2.5 pswd is OK

2. I would have a separate stack as the start up and link to another 
locked stack for the "Full stack protection".

3. Others here would know this. sorry.
4. ditto

Tom

On Oct 4, 2004, at 1:19 AM, Bill Vlahos wrote:

> I have a project where the data is stored in custom properties of 
> multiple cards in a stack that also has the UI for the user. Access to 
> the data by the user can be restricted by a password the user can set. 
> I want to protect my code in the stack as well.
>
> What are the options in 2.5 to keep the data and stack structure 
> secure?
>
> 1. Will the password mechanism in 2.5 be sufficient to protect my code?
> If not, what are the options?
>
> 2. I want to allow the user to access the initial card of the stack 
> but require a password (that they can set) to access any other cards. 
> Access should be granted for as long as the user has the stack open 
> (like a lot of web pages).  Once the stack is closed, or on an 
> openStack,  or the user wishes to lock it again, the lock should be in 
> place.
> Would it work to check the value of a variable, field contents on a 
> card that is not the initial card, or some custom property somewhere 
> to grant access to the destination card?
>
> 3. How strong is the encryption that is built into the locking stack 
> password?
> If it isn't strong enough, what other options are there?
> The product has to work without requiring access to the Internet for 
> public key/private key exchanges and the program needs to be able to 
> save changes in a way that leaves the data file always protected.
>
> 4. Is doing this in a stack the right approach or would it be better 
> to have a binary data file like more traditional programs? If a data 
> file is the right way to go, how can that be protected?
>
> Please let me know what you think.
>
> Thanks,
> Bill Vlahos
>
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Thomas J McGrath III
3mcgrath at adelphia.net

412-831-3094
220 Drake Road
Bethel Park, PA 15102