Current payment encryption standards weren’t designed for a quantum future. The mathematical problems that make RSA and ECC secure today will be trivially solvable by quantum computers sometime in the next few years. Unlike typical cybersecurity threats that target immediate vulnerabilities, the post-quantum risk is unique. Adversaries can steal encrypted data along with the public keys now and simply wait to gain access to “cryptographically relevant” quantum computers before decrypting it.
The responsibility for protecting customers’ financial data, authentication credentials and other personal data, such as a mobile number and a social security number, lies with multiple entities of the payment ecosystem. These institutions include:
· Market infrastructures: Central securities depositories, CCPs, payment system operators, ACH operators, RTGS operators
· Central banks: Issuing and operating wCBDC, operating settlement infrastructure, RTGS and related high-value payment systems
· Commercial banks: Institutions operating as direct RTGS participants, correspondent banks, stable coin issuers
· Fintech payment processors: Those handling high-volume real-time payments, cross-border gateways
· Stable coin and digital asset operators: Licensed stable coin issuers, token-based deposit platforms
Payment data in these systems has long-term value. Compromised transaction histories, customer profiles and authentication data can be exploited years after capture. Regulatory bodies worldwide are developing new compliance frameworks that will require quantum-safe cryptography.
The financial consequences can be substantial. IBM’s 2026 Cost of a Data Breach research consistently shows that data breaches in the financial sector rank among the most expensive across industries, with the average cost of a breach reaching USD 6.29 million. These costs extend well beyond incident response to include customer churn, regulatory scrutiny, litigation and reputational damage. Organizations that proactively strengthen their security posture can significantly reduce financial exposure when incidents occur.
The challenge extends beyond technology. Many financial institutions lack visibility into where cryptographic keys are used across their payment infrastructure. The lack of visibility makes migration to quantum-safe standards seem overwhelming. The complexity of payment ecosystems, with multiple platforms, legacy systems and interconnected partners, amplifies the challenge.
The 2026 Cost of Data Breach Report found that only 37% of breached organizations reported encrypting sensitive data at the time of the breach. Just 34% had controls in place to monitor and secure cryptographic assets such as keys and certificates across their environments. As payment ecosystems become increasingly interconnected, these visibility and governance gaps can create significant exposure.
Building quantum resilience requires more than deploying new algorithms. It requires discovering where cryptography is used, identifying vulnerabilities, establishing crypto-agility and creating a roadmap for migration to post-quantum security standards.