drm

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MAIN TOPIC
NAME
ROLL.No

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CONTENTS
 IntroductionIntroduction
 DefinationDefination
 Survey And AspectSurvey And Aspect
 Design And ImplementationDesign And Implementation
 Requirements For DRMRequirements For DRM
 DRM under AttackDRM under Attack
 Emerging TrendsEmerging Trends
 ConclusionConclusion

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INTRODUCTION
 The Internet has emerged as a vibrant informationThe Internet has emerged as a vibrant information
and digital entertainment .and digital entertainment .
 AS a hyper distribution channel for its easy andAS a hyper distribution channel for its easy and
efficient dissemination of content, it also facilitatesefficient dissemination of content, it also facilitates
the synergy of digital technologies to provide athe synergy of digital technologies to provide a
richer user experience.richer user experience.
 The ease of copying and sharing of digital contentThe ease of copying and sharing of digital content
such as music, without any deterioration in quality,such as music, without any deterioration in quality,
has resulted in rampant piracy.has resulted in rampant piracy.
 To curb this piracy ,One of such measures is DigitalTo curb this piracy ,One of such measures is Digital
Rights Management (DRM).Rights Management (DRM).

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DEFINITION

DRM is a cluster of techniques designed toDRM is a cluster of techniques designed to
restrict unwanted copying and distributionrestrict unwanted copying and distribution
of intellectual property such asof intellectual property such as
music,video,software.music,video,software...
 DRM refers to controlling and managingDRM refers to controlling and managing
rights to digital intellectual property.rights to digital intellectual property.
 DRM is the description, identification, andDRM is the description, identification, and
protection, monitoring and tracking of allprotection, monitoring and tracking of all
forms of rights .forms of rights .
 Examples include Apple's iTunes/Fairplay,Examples include Apple's iTunes/Fairplay,
Windows Media Player, Real Networks.Windows Media Player, Real Networks.

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SURVEY
 Survey on the technological aspects of
Digital Rights Management
William Ku and Chi-Hung Chi
School of Computing, National University
of Singapore .
Singapore 117543, Republic of Singapore

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ASPECT
Mainly it has 3aspects:Mainly it has 3aspects:
 Legal AspectLegal Aspect:: No DRM technology is goingNo DRM technology is going
to be of much help if the law does not provideto be of much help if the law does not provide
provisions to enforce the rights of the contentprovisions to enforce the rights of the content
owners.owners.
 Social AspectSocial Aspect:: DRM needs to address a host ofDRM needs to address a host of
social issues such as privacy And fair use.social issues such as privacy And fair use.
 Economic AspectEconomic Aspect:: It rIt requires certainequires certain
economic questions to be answered such as whoeconomic questions to be answered such as who
would pay for the DRM structurewould pay for the DRM structure..

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DESIGN AND IMPLIMENTATIONDESIGN AND IMPLIMENTATION
There are two critical architectures toThere are two critical architectures to
consider:consider:
 Functional Architecture:Functional Architecture:
 Information Architecture:Information Architecture:

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Functional Architecture
It work under three AreaIt work under three Area
• Intellectual Property (IP) Asset Creation And CaptureIntellectual Property (IP) Asset Creation And Capture
It supports three modulesIt supports three modules
right validationright validation
Right creationRight creation
Work flowWork flow
• IP Asset ManagementIP Asset Management
It supports two modulesIt supports two modules
repository functionrepository function
trading functiontrading function
• IP Asset UsageIP Asset Usage
It supports two modulesIt supports two modules
 permission managementpermission management
 tracking managementtracking management

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Functional Architecture
Figure 1 - DRM Functional Architecture

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Information Architecture:
It Includes 3 Points
 Modeling the entitiesModeling the entities
It involveIt involve user,content,rightsuser,content,rights..
 Identifying and describing the entitiesIdentifying and describing the entities
All entities need to be Identified and Described.All entities need to be Identified and Described.
 Expressing the rights statementsExpressing the rights statements
It consists of Permission, constraints,ObligationIt consists of Permission, constraints,Obligation

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Information Architecture
Figure 2 - DRM Information Architecture - Core Entities Model

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IFLA MODEL
It allows content to be identifiedIt allows content to be identified
 WorkWork(Distinct Intellectual or artistic(Distinct Intellectual or artistic
creation)creation)
 Expression(relization of a work)Expression(relization of a work)
 Manifestion(digital embodiment of anManifestion(digital embodiment of an
expression of work.expression of work.
 Item(Instantiation of Manifestion)Item(Instantiation of Manifestion)

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CONT….
Figure 3 - DRM Information Architecture - Content Model

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RIGHT EXPRESSION MODEL
 Permissions (i.e., usages) - what you arePermissions (i.e., usages) - what you are
allowed to doallowed to do
 Constraints - restrictions on the permissionsConstraints - restrictions on the permissions
 Obligations - what you have toObligations - what you have to
do/provide/acceptdo/provide/accept
 Rights Holders - who is entitled to whatRights Holders - who is entitled to what

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CONT….
Figure 4 - DRM Information Architecture - Rights Expression Model

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REQUIREMENTS FOR DRM
 Hardware and software implementationsHardware and software implementations
 MobilityMobility
 SecuritySecurity
 User PrivacyUser Privacy

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DRM UNDER ATTACK
Weakness in Existing SystemsWeakness in Existing Systems
as three main categories:as three main categories:
 direct attacks at the architecture of the DRMdirect attacks at the architecture of the DRM
systemsystem
 circumvention attacks such as sound and videocircumvention attacks such as sound and video
grabbinggrabbing
 brute-force attacks on password-based systemsbrute-force attacks on password-based systems

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THREE KNOWN ATTACKS
Attacks on Audio DRM systems:
Sound Grabbing
E.g: unfuck software
Attacks on Video DRM systems:
Video grabbing
eBooks:
Brute-Force attacks

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Emerging Trends
 Mobile DRMMobile DRM
 DRM for EveryoneDRM for Everyone
 DRM and Trusted ComputingDRM and Trusted Computing
 Content reuse and granularityContent reuse and granularity

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CONCLUSION
 Digital Rights Management is emerging as a
formidable new challenge and it is essential for DRM
systems to provide interoperable services.
 DRM standardization is now occuring in a number of
open organisation.
 Solutions to DRM challenges will enable untold
amounts of new content to be made available in safe,
open, and trusted environments

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