Stellar Protocol 30 Adds Post-Quantum Encryption Standards
The mandatory network upgrade enables millisecond ledger timing and quantum-resistant signatures by November 23, 2026.
Updated on Oct. 21, 2026 in Quantum Computing
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The Stellar network has announced Protocol 30, a major update known as the Bell update that introduces post-quantum encryption and millisecond ledger timing. This mandatory upgrade requires all network infrastructure, wallets, and exchanges to update their software by November 23, 2026, to maintain compatibility with new blocks.
Why it matters
By implementing post-quantum signature support and improving transaction timing, the update aims to simplify technical integration for large-scale fintech platforms. This shift is designed to facilitate the tokenization of real-world assets on the network.
Protocol 30 integrates ML-DSA for post-quantum signatures and moves the system clock to millisecond resolution. These changes ensure infrastructure readiness against future quantum threats while improving temporal precision for financial transactions.
The players
Stellar Network
A decentralized, open-source blockchain network optimized for the issuance and exchange of digital assets and real-world tokenization.
The details
The update package centers on three core change proposals (CAPs). CAP-87 implements the ML-DSA post-quantum signature standard, a cryptographic algorithm designed to remain secure against quantum computing attacks. CAP-88 transitions the network ledger to millisecond system clock timing, while CAP-84 introduces smart contract multiplexing to allow more complex financial operations.
Timeline
October 16, 2026: Infrastructure and SDK release phase begins.
October 23, 2026: Infrastructure and SDK release phase concludes.
November 23, 2026: Final validator vote and system update deadline.
The Tech Race
Stellar is aligning its architecture with global moves toward post-quantum encryption standards. This update follows a broader industry trajectory where blockchain networks prioritize security hardening to attract large-scale custodial and fintech services.
Infrastructure providers, wallet developers, and exchanges must update their SDKs by November 23, 2026, or they will lose the ability to recognize new network blocks. This transition is required to ensure ongoing interoperability with the upgraded Stellar ledger.
The takeaway
The Bell update marks a shift toward institutional-grade performance and security within the Stellar ecosystem. Developers should monitor the validator vote on November 23, 2026, to ensure compliance with the mandatory protocol transition.
What happens next
Stellar validators will conduct a final network vote on November 23, 2026, which will finalize the implementation of Protocol 30.
Further reading
Learn more about the latest developments in Quantum Computing infrastructure and security standards.
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