NDAY-2017-0101: iCloud Information Leak

The blog explains that mobile APIs are susceptible to abuse via emulators, tampered apps, and replay attacks, and presents app attestation as a critical control to ensure API requests originate from genuine, untampered apps on trusted devices. It describes Zimperium's zDefend SDK features — runtime protection, emulator detection, replay attack prevention, and key protection — as measures to secure communications between mobile apps and backend servers.