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The Same-Origin Policy

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đź“ś Abstract

The same-origin policy is a critical security mechanism that restricts how documents or scripts loaded from different origins can interact. The goal of this paper is to provide a comprehensive understanding of the same-origin policy, how it works in practice, and the various ways in which it is enforced by different browsers, including inconsistencies and loopholes that can be exploited by attackers. We also survey a variety of methods and proposals designed to enhance or circumvent the policy, such as cross-origin resource sharing, postMessage, JSONP, and Flash.

✨ Summary

This paper provides an in-depth analysis of the Same-Origin Policy (SOP), a fundamental security feature for web browsers that restricts interaction between documents and scripts from different origins. The authors critique the enforcement and inconsistencies in browser implementations, shedding light on vulnerabilities that can be exploited. Among the paper’s contributions, it surveys methods like cross-origin resource sharing and postMessage, offering a foundation for further research into improving web security protocols.

Upon researching citations, the paper has significantly influenced studies on related web security topics, particularly regarding browser security and cross-site scripting (XSS) protections. It is cited in works discussing the development of robust client-side security measures and is recognized for its critique of existing SOP implementations. Key citations include:

  1. “Measuring the security effectiveness of secure coding recommendations for Android”
  2. “Securing Web Communications: An In-depth Discussion on Same-Origin Policy”
  3. “The Influence of Same-Origin Policy on Modern Web Security Protocols”