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Preventing Internet Challenges For Honest Users With Privacy Pass.pdf

popets-2018-0026.pdf
Preview of Preventing Internet Challenges for Honest Users with Privacy Pass
🔗 Source: petsymposium.org
📊 Size: 828 KB
📄 Pages: 17 pages
⬇️ Downloads: 325

Summary

The article introduces "Privacy Pass," a cryptographic protocol designed to protect users from excessive internet challenges (like CAPTCHAs) imposed by content delivery networks (CDNs). CDNs often block or restrict access for shared IP addresses, unfairly affecting Tor, VPN, and I2P users.

Key Points:

- Problem: CDNs use public IP-based reputation checks to protect websites, disproportionately affecting users with poor past behavior associated with their shared IP. This limits access for honest users behind these IPs, including Tor/VPN users.
- Solution: Privacy Pass provides a 1-RTT (one round trip) protocol using an oblivious pseudorandom function (PRF). Users receive anonymous tokens for each challenge they solve, which can be exchanged later for access without further challenges.
- Implementation: The solution is implemented as a browser extension ("Privacy Pass") and integrated with Cloudflare's CDN infrastructure. It could also be used for anonymous editing or other applications.
- Anonymity: The system ensures user anonymity, preventing CDNs from linking requests and identifying honest users.
- Impact: Cloudflare data shows that 17% of Tor network requests are challenged, highlighting the significant potential benefit for improving web accessibility for these users.
- Related Work: The approach draws inspiration from anonymous e-cash systems (like Chaum's blind signatures) and anonymous blacklisting techniques.

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Description

Bypassing Internet Challenges" by Davidson et al. (2018) addresses the issue of unfair targeting of honest users, especially those using privacy tools, by content delivery networks (CDNs). It proposes a solution to prevent these users from facing disproportionate internet challenges like CAPTCHAs.

Technical Information

  • File Format: PDF
  • File Size: 828 KB
  • Pages: 17
  • Language: EN
  • Total Downloads: 325
  • Last Updated: 3 hours ago

Document Overview

This PDF document about Preventing Internet Challenges for Honest Users with Privacy Pass provides comprehensive information and guidance. Whether you're a beginner or advanced user, this resource offers valuable insights into Preventing Internet Challenges for Honest Users with Privacy Pass.

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