Grace Tanaka

Smart contract auditor turned security journalist. Covers DeFi exploits, bridge hacks, and protocol vulnerabilities. Her post-mortems are the ones developers actually read.

50 articlesTechnical & Precise

defisecurityhackssmart contractsprotocols

Articles by Grace Tanaka

Oct 26, 2026

Vultisig's August Patch Fixed a Key Leak That Needed Only One Compromised Signer

A stop condition in Vultisig's ECDSA signing flow was being ignored, which meant one already-compromised signer could feed the wallet malicious messages until it leaked enough to recover a private key. The fix shipped in the August updates. The bug class is a bigger problem than the bug.

Oct 25, 2026

Circle's Gateway Adds cirBTC and EURC, But the 500ms Speed Claim Has an Asterisk

Circle expanded Gateway beyond USDC on October 23, adding its wrapped Bitcoin token and the euro stablecoin. The unified interface is real progress for treasury teams, but the route matrix is lopsided and the sub-500-millisecond pitch only starts counting after deposits finalize.

← All authors

Latest Articles

The OCC Just Opened a Stablecoin License to 4,500 Community Banks. Here's the Math.

Custody's Real Problem Isn't Security Anymore: 30% of Off-Exchange Crypto Is Trapped Behind Bank Workflows

Vultisig's August Patch Fixed a Key Leak That Needed Only One Compromised Signer

Blink's $1 Dormancy Fee Just Billed 100,000 Accounts Holding $800K in Ghost Bitcoin

Solana's 29-Millisecond Trade-Off: SIMD-0675 Tests Geography Against Randomness

Canada Opens Its Stablecoin Consultation, and the GENIUS Act Is Already Doing the Talking

Aviva Puts Another £50 Million of Cash Fund Shares on XRP Ledger, Bringing Its Total Past £86 Million

The OCC Just Put a Date on Stablecoin Compliance: January 18, 2027

Grace Tanaka

Articles by Grace Tanaka

Vultisig's August Patch Fixed a Key Leak That Needed Only One Compromised Signer

Circle's Gateway Adds cirBTC and EURC, But the 500ms Speed Claim Has an Asterisk

Solayer Pay Drops the Bridge Step on 5 Chains. 45,000 Cardholders, One Custody Question.

The SEC Put Tokenization on Its 2027 Risk List. Crypto Didn't Even Get a Section.

Bitcoin Hashrate Hits a Seven-Month High as the AI Pivot Fails to Cool the Mining War

Grayscale Just Cut the Cash Leg Out of 10 Crypto Funds. The $50,000 Minimum Didn't Move.

Michael Howell Wants a 50/50 Bitcoin-Gold Split, and $70K Is the Line That Decides It

Mastercard Wants to Score Stablecoin Payments Before They Settle. The 60% Number Explains Why

Mt. Gox Just Moved the Deadline to 2027. That's Six Extensions and Counting

SEC's Crypto Rulebook Hits Its Comment Deadline. The Exemption Caps Will Decide Everything

Gladstein's Freedom Stack: Local AI, Open Weights, No Gatekeepers

Ledger's $90M Supply Chain Scare: Why a Genuine Check Wasn't Enough

Standard Chartered Adds Singapore Crypto Custody, Its Fourth Jurisdiction Since 2022

Circle and Coinbase Drop 10% as the CLARITY Act Stalls in the Senate

Permanent Bans and Zero Fines: The Real Weight of the FTX Settlement

A 1.377 BTC transfer just exposed the flaw in Trump's 'never sell' Bitcoin promise

Bitcoin's Weekly RSI Just Flashed the Same Signal as the 2022 Bottom

Coldcard's Firmware Update Exposes a Hard Truth: 100,000 Hardware Wallets May Need New Seeds

21Shares Ethereum ETF Faces $48.4M Redemptions Amid Staking Constraints

MSCI's Latest Index Move Threatens Bitcoin-Heavy Firms Like Strategy

Abu Dhabi's $763.7 Million Bitcoin ETF Bet: A Strategic Hold

Nvidia's Earnings Anticipation: TSMC and Ciena Hold the Winning Cards

Multicoin Capital's Sudden Exit from Solana's Largest Treasury: What It Means for Crypto

S&P 500 Breaks Records Again: What This Means for Crypto Enthusiasts

Arthur Hayes Eyes $60 Billion Fed Cap as Bitcoin's Next Big Liquidity Trigger

2026's Best Charging Accessories: A Market Trends and Crypto Implications

Bitcoin's Independence Tested as Strategy Dumps $216M in BTC

Crypto Roundup: Bitcoin Surges, Coinbase Delays Bill, and Ripple Expands in Europe

Nasdaq's Wild Ride: Tech Volatility Hits Highest Levels Since Dot-Com Bust

Mitch McConnell's Health Concerns: What It Means for the Crypto Market

HTX's $900 Billion Trading Surge: What It Means for Crypto's Future

AMLA Expands Crypto Oversight: What the MiCA Transition Means for the Industry

Why US Investors Are Paying a 51% Premium for SK Hynix Shares

ECB's Digital Euro Pilot: Europe's Answer to Dollar Dominance?

XRP Price Dilemma: Will It Bounce or Break Below $1?

Ripple's RLUSD Stablecoin: A New Era or Just Another Coin?

Bitcoin Poised for a Major Break: Google Gemini Sees $150k by 2026

Cardano's Leadership Rumors: What Does It Mean for Crypto Investors?

Bitcoin's Looming Threats: Quantum Computing and Miner Incentives

Empery Digital Sells 1,400 BTC to Fund AI Pivot: Is This a Trend?

Ethereum's Path to a $5 Trillion Valuation: Ambitious or Achievable?

SEC Rethinks Regulation: Prediction-Market ETFs Spark Scrutiny

Solana's Q2 2026: $5.77 Billion in Tokenized Asset Volume Signals a New Era

Bigme's B251 Pro: A 60 FPS Leap in E-Ink Monitor Tech

Japan's Bitcoin Mining Shakeup: SBI Crypto's Surprising Shutdown and Its Ripple Effects

Palantir's 37% Drop: Is AI Competition the Real Issue?

From Hoop Rolling to Virtual Reality: Summer's Evolution Over a Century

Navigating Taxes Alone: 23% of Retirees Face Unique Financial Challenges

Cathie Wood's Latest Bets: Tesla, SoFi, and Recursion Pharmaceuticals

Battle of the Banking ETFs: KBE vs. IAT and What It Means for Crypto Investors