We also found that the encrypted local store wasn¹t effective for pre-popluated or user persisted data. We ended up building our own encrypted container as we needed to be able to allow a user to backup and recover it as data in the ELS directory isn¹t necessarily available to the Vista user without administrative privileges. K
On 6/2/09 10:23 AM, "arieljake" <[email protected]> wrote: > > Hi all, I need some help from the community with this. I am very close to a > solution, but may have hit a snag. > > The accepted approach for encrypting an AIR app is to deliver an encrypted swf > with a wrapper that decrypts and loads the child. > > The issue becomes how/where to store the decryption key for the wrapper to use > when loading the child. > > Nitro-LM / Simplified Logic embeds the key in wrapper and uses proprietary > methods to make extracting that key difficult. > > Here is the alternative I am playing with: > > Company X create a simple program compiled with the same product id and AIR > certificate as the program they are distributing to generate at home base the > files for an empty Encrypted Local Store that has had the encryption key added > to it. Then, the Encrypted Local Store files created by AIR are added to the > AIR file - these files are encrypted with AIR's encryption mechanism. When the > AIR file is installed, these files are then copied by the wrapper into the > Encrypted Local Store directory and then read from using the AIR API for the > Encrypted Local Store - and voila - the wrapper has the decryption key and the > key is never transmitted in clear text. > > I tried this and it seemed to work, but then it seems as if it doesn't work > from one computer to the next - AIR seems to encrypt the ELS files with a > formula that includes the program ID, the AIR certificate, AND the user's > computer id, which prevents the company from distributing the original ELS > files. > > Can only Adobe verify whether this solution will work? Can anyone lend insight > / advice on this? Thanks. > > > > >> > > Kevin F. Benz > [email protected] 425-785-7100 > http://www.kbenz.com > > "We can't solve problems by using the same kind of thinking we used when we > created them" - Albert Einstein >
