Copyright industries are using digital rights management (DRM) systems such as encryption envelope, access codes, digital watermarking, or digital signatures to prevent unauthorized copying or use of commercially valuable digital content. However, the DRM is not, in itself, a fail-safe measure because what technology can do, another technology can always undo. The copyright industries, such as music, films, audiovisual, therefore, had questioned the role of copyright on the Internet and the World Wide Web. They successfully persuaded legislatures in the U.S., the European Union, and other countries to adopt broad anti-circumvention rules to protect DRM from being hacked. These same rules also prohibit manufacturing or making available technologies, products and services capable of defeating DRM. The paper will focus on the legal protection of technological protection measures (TPM) or DRM and its ramifications for the digital ecosystem. In particular, the paper examines whether a strict application of the anti-circumvention rules could significantly discourage (the legitimate right to engage in software reverse engineering and) the development of interoperable or complementary products.