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Title:
SoK: Systematizing Hybrid Strategies for the Transition to Post-Quantum Cryptography
Authors: Abdoul Ahad Fall
Abstract:The rapid advancements in quantum computing pose a significant threat to widely used cryptographic standards such as RSA and Elliptic-Curve Diffie-Hellman (ECDH), which are fundamental to securing digital communications and protecting sensitive data worldwide. The increasing feasibility of “harvest now, decrypt later” strategies where adversaries collect encrypted data today with the intent of decrypting it once quantum computing reaches sufficient maturity underscores the urgency of transitioning toward quantum-resistant cryptographic solutions. A pragmatic approach to maintaining security during this transitional period is the adoption of hybrid cryptographic techniques, which integrate traditional cryptographic mechanisms with post-quantum cryptography (PQC) and Quantum Key Distribution (QKD).
This paper presents a comprehensive review of hybrid cryptographic approaches, focusing on their incorporation into widely adopted security protocols such as TLS 1.3 and QUIC. We examine the key challenges associated with deploying hybrid cryptography, including performance trade-offs, security guarantees, and compatibility with existing infrastructure. Beyond protocol-level implementations, we explore the initiatives undertaken by global standardization bodies and leading technology firms to facilitate a seamless transition toward a quantum-secure future. By analyzing current strategies and insights from early adopters, we identify the critical factors that organizations must consider to effectively implement hybrid cryptographic solutions, ensuring resilience against emerging cryptographic threats.
ePrint: https://eprint.iacr.org/2025/2052
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