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Aleo releases a white paper on privacy stablecoins, proposing a permissionless institutional-level privacy stablecoin architecture

Aleo released the privacy stablecoin white paper "Stablecoin Privacy," stating that the privacy layer is the key infrastructure missing for blockchain payment rails to be adopted by mainstream institutions. Aleo indicated that as the GENIUS Act provides opportunities for the widespread adoption of stablecoins, the issue of permanently public transaction information on public blockchains may still hinder institutions from using stablecoins in scenarios such as payroll, fund management, and vendor payments.Aleo claims that existing solutions do not adequately meet the needs of institutions in terms of privacy protection and risk management. The white paper proposes a permissionless private stablecoin architecture based on Aleo, which introduces programmable risk mitigation mechanisms while protecting transaction privacy through zero-knowledge technology and programmable smart contracts, allowing institutions to conduct private transactions without sacrificing compliance and risk control.It is reported that the team members behind this white paper have long been dedicated to research at the intersection of cryptography, policy, and financial systems. Aleo's Global Policy Director Yaya J. Fanusie, member of the Crypto Innovation Council and former Global Financial Crimes Compliance Officer at Coinbase Valerie-Leila Jaber, and cryptographer and Johns Hopkins University Computer Science Professor Matthew Green possess rare practical experience in private payments, financial regulation, and zero-knowledge cryptography.

Coinbase reviews the May outage incident: AWS cascading failure exposes architectural risks

Coinbase released a retrospective report on the large-scale service interruption event on May 7, 2026.The outage lasted approximately 8 hours, with full recovery taking about 12 hours. During this time, trading, deposits, withdrawals, and most core services were unavailable or severely degraded. Coinbase stated that the outage was caused by multiple cooling units failing simultaneously in the cooling system of a data center in one availability zone (use1-az4) in the AWS us-east-1 region, triggering cabinet thermal protection shutdowns, which led to EC2 instances and EBS volumes going offline, affecting multiple internet services.During the recovery process, the Coinbase trading matching engine lost quorum due to the cluster architecture deployed in a single AWS data center losing most nodes. It required urgent code adjustments and the reconstruction of a new node group to restore operation, gradually restarting market trading during the recovery.Additionally, the AWS-managed Kafka (MSK) service experienced control plane failures, preventing the automatic re-election of partition leaders, further blocking quotes, fees, and some settlement and data flow systems, which expanded the overall impact.After manual partition migration in collaboration with the AWS engineering team, the system gradually returned to normal. Coinbase stated that this incident exposed its shortcomings in cross-availability zone automatic switching capabilities and disaster recovery for managed middleware. The company will upgrade its cross-region hot backup architecture, strengthen regular failure drills, and migrate the Kafka system from dual availability zones to a three availability zone deployment, while also working with AWS to advance root cause fixes and improvements.
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