WhatsApp Scales Up Security with Rust-Powered Media Checks
TL;DR Summary
WhatsApp deployed a Rust-based media library across billions of devices, replacing 160k lines of C++ with 90k lines of Rust to boost memory-safety and performance. Sparked by the Stagefright vulnerability, the rollout used fuzzing and tests to ensure compatibility, and introduced Kaleidoscope checks to flag dangerous, non-conformant, or spoofed files. The effort spans Android, iOS, Mac, Web, wearables, and more—the largest Rust deployment on client-side platforms—and signals broader Rust adoption for defense-in-depth security.
- Rust at Scale: An Added Layer of Security for WhatsApp Engineering at Meta
- WhatsApp unveils high-security mode, latest tech firm to offer users stronger protection Reuters
- WhatsApp’s new ‘lockdown’ settings add another layer of protection against cyberattacks The Verge
- WhatsApp Rolls Out Lockdown-Style Security Mode to Protect Targeted Users From Spyware The Hacker News
- WhatsApp is rolling out a new stricter security setting to protect users from cyberattacks TechCrunch
Reading Insights
Total Reads
1
Unique Readers
13
Time Saved
6 min
vs 7 min read
Condensed
95%
1,346 → 73 words
Want the full story? Read the original article
Read on Engineering at Meta