U.S. Alliance For Civic Engagement Warns of ‘Harvest Now, Decrypt Later’ Threat, Emphasizing Complexities of PQC Migration

August 2, 2026

Alliance For Civic Engagement USA

Overview

The Alliance For Civic Engagement has issued a stark warning about the ‘Harvest Now, Decrypt Later’ (HNDL) threat, even though current quantum computers cannot yet break RSA encryption. HNDL posits that adversaries could steal currently encrypted data and decrypt it once quantum computing matures. NIST finalized its first official Post-Quantum Cryptography (PQC) standards in August 2024, providing a validated framework for federal agencies to transition from RSA. However, this migration is anticipated to be time-consuming and expensive due to the deep embedding of cryptography in hardware and legacy systems.

In Depth

Key Findings

The Alliance For Civic Engagement has raised a significant alarm regarding the ‘Harvest Now, Decrypt Later (HNDL)’ threat, despite the current inability of quantum computers to break RSA encryption. This HNDL scenario suggests that malicious actors could currently collect and store encrypted sensitive data, with the intention of decrypting it once quantum computing capabilities mature. In response to this looming threat, the U.S. National Institute of Standards and Technology (NIST) finalized its first official Post-Quantum Cryptography (PQC) standards in August 2024, providing a validated framework for federal agencies to migrate from existing RSA encryption. However, this transition is projected to be both time-consuming and costly, primarily due to the deep integration of cryptographic primitives within existing hardware and legacy systems.

Technical and Policy Details

The PQC algorithms standardized by NIST (e.g., ML-KEM, ML-DSA, SLH-DSA) are built upon mathematical problems, such as lattice-based or hash-based cryptography, that are believed to be resistant to efficient attacks by quantum computers. The HNDL threat is particularly severe for data requiring long-term confidentiality, such as national security secrets, medical records, and intellectual property. Migrating to PQC necessitates not just software updates, but comprehensive changes across hardware chips, firmware, communication protocols, application layers, and the entire IT supply chain. For long-lived infrastructure (e.g., power grids, aerospace systems), cryptographic upgrades present substantial physical and operational challenges. The federal government’s leadership in this migration aims to encourage private sector adoption of PQC, thereby enhancing national cybersecurity resilience.

Background and Context

The comparison of PQC migration to a ‘Modern Y2K’ highlights the immense scale of the challenge. While the Y2K problem involved a date formatting bug, PQC migration requires replacing the fundamental security mechanisms of entire systems, a task far more complex than Y2K. Many organizations lack a complete inventory of their cryptographic usage across IT infrastructure, making the initial step of identifying quantum-vulnerable systems a significant hurdle. Untangling and coordinating cryptographic dependencies across multiple layers of the supply chain is also crucial. This issue involves not only technical aspects but also significant human resource, budgetary, and governance challenges.

Strategic Significance and Outlook

PQC migration is an indispensable process for ensuring the resilience of the entire digital economy. The establishment of NIST standards and the federal mandate for migration serve as critical accelerants for this process. Businesses and organizations must take the HNDL threat seriously, proactively assess their cryptographic agility (the ability to rapidly and efficiently change cryptographic algorithms), and formulate migration strategies. This requires developing in-house PQC expertise and collaborating with vendors who offer PQC solutions. Executing a comprehensive and coordinated PQC migration plan before quantum computers become a practical threat is paramount for national security and corporate survival.

Source: https://ace-usa.org/blog/research/research-technology/the-modern-y2k-the-shift-to-post-quantum-cryptography-and-implications-for-data-security/

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