Saving App-Specific Docs

Luis luis at anachreon.co.uk
Tue Sep 26 11:03:22 CDT 2006


It might be a case where it is an invisible file, or that there are two 
plist files, one in root/Library and the other in User/Library.

Cheers,

Luis.


Trevor Hopkins wrote:
> Thanks for the tips. What I'm primarily looking for is a way to store 
> registration key/trial expiration data in a way that is least visible to 
> the user. For an OS X application, is there a way to store this type of 
> data in its plist file?
> 
> If I store the data in a text file, regardless of encoding mechanism, 
> the user could potentially find the file and delete it, thereby starting 
> the trial period for the application anew. I noticed in a couple of 
> Cocoa shareware apps that I tried, that if I deleted their pList files 
> in Preferences, it did not affect their trial periods, i.e., a 10-day 
> trial that had been down to 8-days remained at 8-days even though I 
> deleted its corresponding plist file. In incidences like these, where is 
> that data stored that says how much time is left on a trial or that the 
> copy has already been registered?
> 
> Many thanks,
> 
> Trevor Hopkins
> Exeter, UK
> 
> 
>> From: Richard Gaskin <ambassador at fourthworld.com>
>> Reply-To: How to use Revolution <use-revolution at lists.runrev.com>
>> To: How to use Revolution <use-revolution at lists.runrev.com>
>> Subject: Re: Saving App-Specific Docs
>> Date: Tue, 26 Sep 2006 07:56:07 -0700
>>
>> Trevor Hopkins wrote:
>>> From a Rev application, how does one go about creating and writing
>>> to/reading from a document that is only openable by the Rev app  
>>> itself (i.e., not a text document that anyone can open). I can see  
>>> how to write data to a text document but what about to another type  
>>> of doc that not anyone can get into so easily?
>>
>> There are many good options for protecting data.  In addition to the 
>> other suggestions posted here, if your security needs are modest 
>> there's a very lightweight but reasonably efficient and easy-to-use 
>> encryption handler posted at RevJournal:
>>
>> <http://www.revjournal.com/tutorials/handy-handlers-005.html>
>>
>> Most more "industrial strength" encryption you might also consider 
>> Rev's Blowfish implementation, included in the Studio and Enterprise 
>> packages.
>>
>> -- 
>>  Richard Gaskin
>>  Managing Editor, revJournal
>>  _______________________________________________________
>>  Rev tips, tutorials and more: http://www.revJournal.com
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