Ivan Pagac enhanced key lifecycle management in the walt-id/waltid-identity repository by delivering cross-platform cryptographic key deletion for both Android and iOS. He established the groundwork for COSE Sign1 signature verification, introducing iOS-specific utilities and aligning platform source sets to support future multi-platform cryptographic operations. Ivan’s work focused on maintainability and platform parity, ensuring consistent behavior across Kotlin and Swift codebases. Although no user-facing bugs were addressed, his contributions laid a robust foundation for secure key management and future cryptographic verification features, reflecting a thoughtful approach to cross-platform mobile development and cryptography within a short project timeframe.