Digital Rights Management is a technology that is used in securing the distribution, promotion and sales of a digital media. It protects digital content through limited usage, like for instance in 3G, where operators and content providers need a method that will allow then to sell content without freely distributing it between devices. DRM is defined by the standards of Open Mobile Alliance (OMA). OMA DRM enables controlled consumption of digital media objects by letting content providers express usage rights like the ability to preview DRM content, to prevention of illegally forwarding downloaded DRM content from to other users, and in enabling super distribution of DRM content. Usage rights are controlled with DRM, these are defined for all types of content. Different rights from different users may be applied on the same content. DRM controls usage rights like the number of times it can be used, the period it can be used and the length of time it can be used. This kind of control enables content providers to create more subscriptions and pay-per-use models and will also stimulate mobile content based services.
SISContents is software used in unpacking, editing and signing of Symbian 9 SIS packages. It inspects the files that are contained in the package, and checks for certificates it was signed to and view the PKG script which describes the process of on-device installation. The contents of these packages may be edited and signed after the installation. Packages may be edited by modifying the name, vendor, version, type of installation, supported platforms for devices, software dependencies, and the files and components contained in the package may be added, replaced, deleted and change capabilities, UID3, SID of executables. Signed packages show information on certificates, its validity period, issuer, subject, and others, and they may be deleted from the package. It can also view and save installation PKG script, create SIS packages from PKG scripts, read and unpack contents and files from N-Gage packages, and also view, edit and extract images from multibitmap files embedded in the sis packages. It is compatible with Windows XP, Windows 2003 Server, Windows Vista, windows 2008 Server and Windows 7. Nokia S60 3rd, 5th Edition and Sony Ericsson UIQ 3.x platforms are also supported.