How can I increase memory security in Delphi?

Question

Is it possible to \"wipe\" strings in Delphi? Let me explain:

I am writing an application that will include a DLL to authorise users. It will read an encrypted file

Answer 1

Messy but you could make a note of the heap size that you've used while you've got the heap filled with sensitive data then when that is released do a GetMem to allocate you a large chunk spanning (say) 200% of that. do a Fill on that chunk and make the assumption that any fragmentation is unlinkely to be of much use to an examiner. Bri