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OMA DRM is a Digital Rights Management (DRM) system invented by the Open Mobile Alliance whose members represent the entire value chain, including mobile phone manufacturers (e. g. Nokia, Motorola, Samsung, Sony-Ericsson, BenQ-Siemens), mobile system manufacturers (e. g. Ericsson, Siemens, Openwave), operators (e. g. Offers ringtones, wallpapers and text alerts. Vodafone, O2, Cingular, Deutsche Telekom, Orange) and IT companies (e. g. Microsoft, IBM, SUN). In order to ensure interoperability across all implementations the OMA provides in addition to the specifications also test tools for OMA DRM. The OMA DL DRM group is chaired by Jan van der Meer (Philips) and Willms Buhse (CoreMedia).

The scheme is implemented on many recent phones and is intended to be used by mobile content providers to add Digital Rights Management to their products. Directory of ringtones to download on your mobile phone. To this date two versions of OMA DRM have been released: OMA DRM 1. 0 and OMA DRM 2. 0.

OMA DRM 1. 0 - Started in November 2002 and approved in June 2004: Basic DRM standard without strong protection. Specifies three main methods: Forward Lock, Combined Delivery (combined rights object / media object), and Separate Delivery (separated rights object + encrypted media object). Nokia, Motorola, Samsung15,000 mobile Phone downloads, Music and Ringtones download now!. Forward lock prevents the user from forwarding content such as ringtones and wallpapers on their phone. The content can be distributed using e. g. HTTP or MMS. OMA DRM 2. 0 - Started in July 2004 and approved in March 2006: Extension of the DRM 1. Download Ringtones: Ringtones - All Types of Ringtones. 0 separate delivery mechanism. Each participating device in OMA DRM 2. 0 has an individual DRM PKI certificate with a public key, and the corresponding private key. Each Rights Object (RO) is individually protected for one receiving device by encrypting it with the device public key. The RO in turn contains the key that is used to decrypt the media object.