empty variable

Richard Gaskin ambassador at fourthworld.com
Fri Jan 3 16:29:11 EST 2020

How does the password come into the variable?

  Richard Gaskin
  Fourth World Systems

JB wrote:
> What if I have secure info like a password stored
> in a local variable and then I clear that info by
> putting empty into that local variable.
> How secure is that procedure?  I understand a
> local variable does not retain the info after the
> code finishes but I am concerned about any
> info left in memory.
> In the c language to clear the memory you set
> all of the blocks to null.  That is because it is
> more secure than doing something like putting
> empty into the variable.
> So the question is when I put empty into a local
> variable I know when you access that variable it
> will return empty but if it has not been set to null
> then is it possible for someone to read the blocks
> of memory and get anything back.  In c if you set
> all of the blocks to null and not just the first block
> then you have eliminated the chance of someone
> recovering the info.  Is there a secure way to clear
> a variable in Livecode?
> JB

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