Secure, Efficient, Scalable
Top-tier, battle-tested security solutions for 260+ institutions since 2021.
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MPC Self-Custody
Enterprise-grade digital asset self-custody services
Eliminate single-point failures to manage digital assets
- MPC and TEE technologies protect your digital assets with the highest level of security.
- Manage wallets and transfer funds on multiple terminals, including the mobile App and Web Console.
- Policy Engine flexibly controls access authorization.
- Off-chain multisignature enhances approval privacy and significantly reduces on-chain transaction fees.
Interact with dApps under multi-party control
- Supports all public EVM-compatible blockchains and DeFi protocols.
- Policy Engine meticulously delegates transaction permissions.
- Real-time contract monitoring and phishing detection safeguard every transaction.
- Customize RPC nodes for diverse business scenarios.
- Collaboratively manage smart contract owner’s permissions to reduce single-point risk in critical operations.
Enterprise-grade digital asset self-custody services
- Seamlessly create and manage millions of MPC wallets with APIs.
- Automatic gas fuelling and sweeping significantly improve integration efficiency and accelerate your business success.
- Web3 API securely controls the entire lifecycle of smart contracts.
- API Co-Signer automates transaction approval and signing.
- MPC and TEE technologies provide multi-layer security to eliminate single-point-of-failure risk for private keys.
MPC Node Suite
White-label MPC privatization solutions
Flexibly build MPC wallets for seamless integration into your applications
- Fully privatized, with hardware-level data security and privacy protection under your control.
- A secure, universal, and cross-platform MPC-TSS key management solution.
- Support diverse business scenarios to accelerate your success.
Safest software is
open source
Safeheron independently developed MPC algorithms and is now the world's first company to open-source the mainstream MPC-TSS algorithm in C++.




Why choose us?
100% control over assets
3-of-3 MPC-TSS key management eliminates the single-point failures with full asset control.
Open-source algorithms
Safeheron open-sourced the world's first MPC-TSS algorithm library implemented in C++.
Maximum security
Safeheron’s multi-layer security defenses against state-level attacks.
Certified and insured
Safeheron is certified with ISO/IEC 27001:2022 and SOC 2 and is insured by Lockton.
Extensive features
Safeheron offers one-stop management for Web3, DeFi, NFTs, and smart contracts.
Governance and policy
TEE Policy Engine customizes multi-dimensional policies and approval workflows.
Technical support
Robust technical support encompasses use cases, solutions, technologies, and security expertise.
Diversified solutions
Battle-tested SaaS services and MPC privatization solutions.
Hear from our customers
Latest Updates from Safeheron
What Is Double Spending in Crypto?
What is double spending in crypto? It means the same digital asset is spent twice. Blockchains use network-wide consensus to ensure each unit of funds can be spent only once on the ledger, so double spending cannot happen on a single finalized chain. What an attacker can do is get a recipient to see and accept a payment, then make that payment invalid and spend the same coins elsewhere. For businesses, double-spending risk almost always arises when deposits are credited without enough confirmations. How Do Blockchains Prevent Double Spending? Before including a transaction, nodes check whether its funds have already been spent. On UTXO-based chains like Bitcoin, each unspent output can be spent by only one transaction; on account-based chains like Ethereum, each address’s nonce ensures a transaction with a given sequence number executes only once. Of two conflicting transactions, only one will ultimately be written to the chain. The problem is that until a transaction is included and receives enough confirmations, which one wins is not yet settled. What Are the Common Types of Double-Spending Attacks? The simplest is a race attack at zero confirmations: the attacker broadcasts two transactions spending the same coins almost simultaneously, one to a merchant and one back to themselves. If the merchant ships goods while the transaction is still in the mempool and […]
Can Tether Freeze USDT?
Can Tether freeze USDT? Yes. USDT is a centrally issued stablecoin, and Tether retains administrative control over the USDT smart contracts, including the ability to add addresses to a blacklist. A blacklisted address can no longer send USDT. Centralized stablecoins are designed this way so they can work with regulators and law enforcement, which makes them fundamentally different from assets like Bitcoin and ETH that have no issuer and cannot be frozen by anyone. How Does the USDT Freeze Function Work? On every chain, USDT is a smart contract that records the balance of each address. On Ethereum, for example, the USDT contract maintains a blacklist, and only an administrator address controlled by Tether can add or remove addresses. Whenever someone sends USDT, the contract first checks whether the sender is on the blacklist, and if so, the transaction fails. The contract also includes a function to destroy the balance of a frozen address. All of these actions are public on-chain transactions, so anyone can check on a block explorer whether an address has been frozen. USDT on Tron and other major chains has a similar mechanism, and USDT on different chains is frozen independently on each chain. Which Stablecoins Can Be Frozen? Not just USDT. Most centralized stablecoins issued by companies and fully backed by fiat or equivalent assets […]
What Should You Do If Your USDT Is Frozen?
What should you do if your USDT is frozen? First confirm that the address has actually been blacklisted by Tether, rather than failing for another reason such as insufficient fees. Once confirmed, the only way forward is to contact Tether and provide evidence that the funds came from a legitimate source, with no guarantee of whether or when they will be released. For businesses, prevention matters more: screen the source of funds before accepting them, and isolate risky funds in separate addresses. Why Does USDT Get Frozen? USDT is a centralized stablecoin issued by Tether, and its smart contract has a built-in blacklist, on both Ethereum and Tron. Once an address is blacklisted, the USDT in it cannot be moved. Common reasons for a freeze include law enforcement requests to freeze addresses linked to fraud, money laundering and similar cases, addresses appearing on sanctions lists, and addresses that received funds stolen in hacks. For most businesses, the risk is less about what they themselves did and more about receiving funds from a risky address: at best they may be asked to assist an investigation, and at worst their own address may be frozen too. How Can You Tell Whether Your USDT Is Frozen? When a frozen address tries to send USDT, the transaction fails during contract execution. But a failed […]
ERC-20 vs TRC-20 USDT: What’s the Difference?
ERC-20 vs TRC-20 USDT: what’s the difference? Both are USDT issued by Tether, but one runs on Ethereum and the other on Tron, and they are separate assets that cannot move between the two chains directly. The main differences are fees, speed and address format: ERC-20 USDT pays fees in ETH and uses addresses starting with 0x, while TRC-20 USDT pays fees in energy or TRX, is usually cheaper and faster, and uses addresses starting with T. The sender and the recipient must always use the same chain. How Do Fees Differ Between ERC-20 and TRC-20 USDT? Sending USDT on Ethereum requires ETH for gas, and the fee fluctuates with network congestion, sometimes rising sharply when the network is busy. Sending USDT on Tron mainly consumes energy and bandwidth, which can be obtained by staking TRX, with TRX burned only when they run short, so the cost per transfer is usually lower. That is one reason TRC-20 USDT is widely used for small, frequent payments. On either chain, the wallet must hold the native token, or USDT cannot be sent at all. How Do Speed and Address Formats Differ? Ethereum produces a block roughly every 12 seconds and Tron roughly every 3 seconds, so TRC-20 USDT is usually included faster. But being included is not the same as being safe […]
How Should Businesses Monitor On-Chain Transaction Status?
How should businesses monitor on-chain transaction status? From sending to final settlement, a transaction goes through several stages: signed, broadcast, waiting in the mempool, included in a block, and reaching enough confirmations. Along the way it can also fail, be replaced or be dropped. Businesses need to track these states for every transaction, set confirmation standards per chain, alert promptly on long-unconfirmed transactions, failed executions, unexpected replacements and chain reorganizations, and update business systems based on final status. What States Can an On-Chain Transaction Be In? After signing, a transaction is broadcast to the network and queues in nodes’ mempools. Once included in a block it has its first confirmation, and each additional block adds another; it is only truly complete after reaching the required number of confirmations or the chain’s finality standard. Abnormal cases include failed broadcasts, transactions that go unincluded for a long time, transactions replaced by another one using the same nonce or the same UTXOs, and transactions dropped from the mempool. On EVM chains, note that inclusion does not mean success: a transaction whose contract execution fails is still recorded on-chain and still pays gas, so check the execution result in the receipt. How Many Confirmations Does Each Chain Need? The more confirmations, the less likely a transaction is to be rolled back by a chain […]