What Are Stablecoin Payments? A Complete Guide for Businesses

Stablecoins settled close to $1.8T in some months, but real payments are a much smaller slice. What the numbers say, why collapsing transfer and settlement into one step matters, and where the limits are.

Key Management & Operational Security for Crypto Payments

Multisig, MPC, hot/cold, HSM — not one list of options but three separate dimensions: who signs, where the key lives, how exposed it is. Plus a hybrid split by fund temperature, and why blind signing helped cause Bybit.

On-Chain Compliance for Crypto Payments: AML/CFT, Freeze Risk & a 7-Point Checklist

The Travel Rule assumes both sides are licensed VASPs; when a transfer ends at a non-custodial wallet, there's no identity to exchange. What fills that gap, why stablecoin freezes are by design, and a 7-point self-check.

~$88M Lost: COLDCARD & LULA Exploits | BlockSec Weekly

During the week of July 27 to August 2, 2026, two notable security incidents caused roughly $88M in losses across Bitcoin and BNB Chain. The highlighted COLDCARD incident was a hardware-wallet firmware entropy failure: a build guard that checked whether an RNG configuration macro existed rather than whether it was enabled routed seed generation to a deterministic software fallback, enabling an attacker to recover affected seeds and sweep at least 1,370 BTC (~$88M) across a series of on-chain waves. The LULA token on BNB Chain lost ~$578K to a business-logic flaw where an attacker-reachable path could trigger its privileged `recycle()` function, pulling LULA out of a PancakeSwap V2 pair, resyncing its reserves to the manipulated balance, and draining its liquidity.

Global Crypto Payment License Map: MSB, MiCA, MPI

Most crypto payment firms don't need an issuance license — they need a payment license, and it differs by market: Circle alone holds MTLs in 46 US states. What each jurisdiction requires, plus 8 universal obligations.

Biggest Crypto Payment Hacks & the Attack Surface Beneath Them

Bybit needed several defenses to fail together. MoonPay needed one email. Three 2025 attacks traced to their entry points, and why the contract layer beneath — where USDC and USDT differ — is now your attack surface.

Crypto Payment System Architecture: The 6 Layers and How Money Moves Through Them

Six layers, from the blockchain up to your app, plus a nine-step pay-in flow and a riskier pay-out path that can't be undone. Including one misconception worth clearing up: MPC alone doesn't make a wallet self-custodied.

Stablecoins That Cannot Be Frozen: 2026 Map

A 2026 comparative map of seven stablecoins (USDT, USDC, DAI, LUSD, Frax, RAI, Ethena USDe) across three freeze-capability axes: issuer freeze, contract-level admin, and peg mechanism. Written in a compliance-authority voice, the guide walks the honest trade-offs on each end of the spectrum, from fully-freezable, fully-liquid fiat-backed tokens to truly-unfreezable but thin-liquidity immutable-contract designs (LUSD, RAI), and shows why circulating supply and freeze capability track each other so closely.

Why Is My USDT Frozen? 4 Reasons + What to Do (2026)

If your USDT is frozen, one of four things happened: Tether blacklisted your address on-chain, your exchange froze your balance for compliance review, the wallet you sent to is blacklisted, or a compliance hold has paused a specific transaction. This 2026 direct-answer primer walks through each branch with a fast self-classification path (the free 30-second address check) and the concrete next action for each reason.

How to Unfreeze USDT on Binance: 5-Step Playbook

A Binance USDT freeze is a Binance-side compliance action (KYC/AML/jurisdiction/suspicious-activity/law-enforcement), where the balance is visible in the Binance account but locked from withdrawal or trading. This is structurally distinct from a Tether-side on-chain blacklist that hits a self-custody address. This guide covers the five publicly documented freeze categories, the 5-step official appeal playbook, category-specific timelines (48h for KYC vs. weeks for AML), a 60-second Binance-vs-Tether disambiguation check, and the edge case where a Tether-blacklisted incoming deposit triggers a Binance-side hold.

Newsletter - July 2026

July 2026's three largest DeFi incidents totaled approximately $67.9M in losses across Arbitrum and Solana. AFX Trade lost ~$24.15M after a supply chain attack compromised validator signing authority. Ostium's OLP vault was drained of ~$23.75M through compromised oracle infrastructure that submitted attacker-controlled prices. BonkDAO lost ~$20M when an attacker spent $4.4M to acquire enough voting power to pass a malicious treasury transfer with no timelock. All three incidents demonstrate that a protocol's security boundary extends far beyond smart contract code.

~$39.5M Lost: Allbridge, Wanchain & More | BlockSec Weekly

During the week of July 20-26, 2026, 8 notable security incidents resulted in approximately $39.5M in total losses across Solana, Ethereum, BNB Chain, Arbitrum, Zilliqa, and Cardano. The highlighted Allbridge Core incident (~$1.65M) exposed a Solana input validation flaw where the same Pool account was accepted in both swap roles, with analysis reconstructed entirely from the deployed program binary. Other analyzed incidents include Wanchain (~$500K, flawed message encoding in a Cardano bridge validator), Zilliqa (~$400K, flawed nonce generation in a Ledger app since 2019), and Lien Finance (~$542K, flawed validation logic in bond exchange).