A DRM system can express and enforce conditions concerning who or what may open content, for how long, on which devices, and whether copying, printing, modification, or redistribution is permitted.
A typical design encrypts content and releases a usable key or license after checking identity, device, entitlement, time, or other constraints. Rights expressions, license services, client enforcement, output controls, and sometimes fingerprinting or watermarking work together; the exact model varies by media and business context.
Key points
Policy and entitlementDefine permitted actions and constraints for an asset, associate them with users, accounts, subscriptions, roles, or devices, and maintain revocation or expiry rules.
Protected deliveryEncrypt or package content, authenticate the license transaction, protect keys, and bind authorization decisions to a client or execution environment where appropriate.
Enforcement and evidenceHave the authorized client enforce supported restrictions and record relevant license or usage events while respecting privacy, retention, and legal requirements.
Important limitationDRM does not ensure control after content is legitimately rendered to a person or output device. Screen capture, recording, re-creation, compromised clients, stolen credentials, implementation flaws, and analog outputs can bypass restrictions.