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My applications, which need to be signed:
Symbian OS allows only certificated applications to perform certain operations, for example making a network connection to download or upload data.
Developing and releasing such applications is possible without certification, but installation is possible only after SIS file has been signed (certificated).
Certain kind of applications are released as non-signed SIS files. Users are supposed to trust the alleged author, sign the given SIS files themselves, install and hope for the best.
This is a huge security problem.
Certification process has several problems.
There is supposed to be a way to get freeware applications signed for free. I've heard rumours that at least one application went through this process, got eventually signed and released. If you know the name of this application, please let me know!
There are rumours that Symbian Foundation might be thinking about improvements regarding this issue. No certain information is available yet.
I always rename signed SIS files, so that I will know which phone it belongs to. For example file.sis becomes file_N82.sis.
When you sign and install the SIS file by yourself, you pretty much give free hands for it to do almost whatever it wants to do. Symbian OS might be secure, but you just opened the front door!
(C) 2009 Jouni Miettunen