Hardening identity brokers against replay and injection attacks

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Executive Summary

Identity brokers serve as critical authentication gateways in modern enterprise architectures, yet they face escalating threats from replay and injection attacks. These attacks exploit stolen credentials, tokens, and malicious inputs to bypass security controls, enabling unauthorized access and data breaches. Recent data reveals a 156% increase in identity-based incidents from 2023 to Q1 2025, with such attacks now accounting for 59% of confirmed cyber breaches. Microsoft reported 147,000 token replay attacks in the past year alone, marking a 111% year-over-year rise.

This whitepaper analyzes current threats, examines vendor-specific mitigation strategies, and provides actionable recommendations for Chief Information Security Officers (CISOs) to strengthen their identity infrastructure. Key findings demonstrate that implementing cryptographic token binding, secure session management, and comprehensive monitoring can reduce breach risks by up to 90%. Organizations must prioritize immediate actions including short-lived token adoption and continuous monitoring, while planning long-term investments in zero-trust architectures and advanced threat detection capabilities.

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