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There are several S60 3rd
phones already on the market
now, for instance Nokia 3250,
N71, N80 and N91. There will be
some more phones in the near
future. One of the new features
of S60 3rd Edition is mandatory
signing. It means S60 3rd
applications, themes have to be
signed otherwise they cannot
be installed on S60 3rd phones.
What is signing? Basically
application signing is a way of
adding a tamper-proof digital
signature to an application so
that no one can modify the
application. It will prevent the
users from installing malicious or
hacked applications.
The goal of signing process is
good, but this has created
some headaches to some people.
One of the problems is installing
self-signed application. What is
self-signed application? It's an
application that is signed with
developer's certificate and key.
Some applications use this kind
of signing, for example
SExplorer.
There is an option in S60 3rd
phones to enable or disable
self-signed applications. If you
disable it, you will not be able
to install self-signed applications.
Some people choose to do it so
that they can only install
applications from 'trusted'
sources. With so many Trojan
viruses these days, it is
sometimes wiser to disable this
option.
If you enable it, you will be able
to install ...
any applications,
including self-signed applications
(but still you cannot install
unsigned applications). Some
people prefer to enable this
option because it offers have
greater flexibility. When you try
to install self-signed application,
you will get warning message,
but you can still continue the
installation