How Advanced Browsing Protection Works in Messenger

What this post added

Introduces Advanced Browsing Protection (ABP) for Messenger, enhancing link safety by leveraging Private Information Retrieval (PIR) and Confidential Computing (AMD SEV-SNP). Details the technical challenges and solutions for URL prefix matching in a privacy-preserving manner, including the development of a ruleset pre-processing mechanism to balance bucket sizes and the use of AMD SEV-SNP for secure processing of hash prefixes.