Security

Blockstream has refused a 10% bounty demand from parties holding approximately 598 BTC stolen from the Liquid Network in September, stating it will not pay ransom and will pursue legal remedies to recover the funds.

Blockstream said it will not pay a ransom to recover funds held by Liquid Network hackers, rejecting a demand for a 10% bounty and calling the theft a crime rather than white-hat activity.

Hardware wallet makers Trezor and BitBox alerted users on September 9 about phishing emails falsely claiming to be security alerts from the companies. Trezor confirmed a breach at a third-party email provider, while BitB...

The Bitcoin Red Team claims it disclosed a critical bug to Blockstream before a security breach allowed the movement of nearly 4,000 BTC from Liquid federation wallets, while Blockstream disputes the allegations.

Quantus has launched its proof-of-work mainnet with post-quantum cryptography built in from the start, addressing potential vulnerabilities in cryptocurrency networks that still rely on elliptic-curve encryption.

An attacker exploited a security flaw in email platform Brevo to compromise 138 client accounts and send phishing emails to approximately 347,000 Trezor newsletter subscribers, with similar fraudulent messages reaching B...

Over 100 researchers using AI coding agents lowered the computational resources needed for a quantum attack on Bitcoin's elliptic-curve cryptography by 86%, highlighting the urgency of post-quantum security migration des...

Anthropic identified what it describes as its largest distillation effort, involving 3,500 accounts linked to Alibaba that conducted over 151 million exchanges with Claude models between May and July 2026.

XRP Healthcare is winding down operations and delisting its tokens following a security vulnerability in XRPH Wallet that exposed thousands of accounts and resulted in approximately $450,000 in losses.

Automated theorem proving powered by AI could streamline smart-contract verification, but developers must now ensure specifications accurately define security requirements.

Malone Lam, 22, admitted his role as ringleader of an international crime group that stole 4,100 bitcoins and other cryptocurrencies through hacking and social engineering between October 2023 and May 2025.

Following a $320 million withdrawal from Liquid's Federation wallet, hackers have accused Blockstream of inadequate security spending and demanded a 10% bounty, threatening a 15% loss for users if refused.

Blockstream's Liquid sidechain restarted block production Thursday, four days after an attacker withdrew approximately 4,000 BTC from its federation wallet. About 600 BTC remains unrecovered as the network rebuilds its r...

Hardware wallet maker Trezor alerted customers to a data breach at its email service provider Brevo, which exposed 347,000 customer addresses to phishing attacks. This marks the third incident for Trezor in recent weeks....

A vulnerability in Superfluid's Celo deployment allowed an attacker to drain over $100,000 from GoodDollar reserves, threatening liquidity for the universal basic income protocol that serves nearly 1 million users.

Federal authorities seized over $52 million in cryptocurrency and sanctioned service providers tied to Xinbi Guarantee, a Chinese-language marketplace that processed an estimated $24 billion in digital assets since emerg...

Quantum computers could theoretically break the cryptographic security underlying Bitcoin ownership, but researchers are developing countermeasures to address the risk.

Empowa disclosed unauthorized transfers totaling 143,710 ADA and 4.24 million EMP tokens from project-controlled wallets, indicating an unauthorized party gained access to private keys.

Trezor, Bitbox, and Cointracking warned customers of phishing emails sent through compromised mailing infrastructure on September 9 and 10, with evidence suggesting multiple cryptocurrency firms were targeted through a s...

A federal jury convicted Jihoon Park of wire fraud and bankruptcy fraud after he stole more than $2.5 million from investors, concealing cryptocurrency holdings and filing false bankruptcy claims.