MPC Wallet: Experience a new level of secure and seamless crypto asset management

MPC Wallet Technology Overview

As a cutting-edge innovation in the Web3 space, MPC (Multi-Party Computation) wallets are transforming how crypto assets are securely managed. A leading wallet provider was among the first to launch an Account Abstraction (AA) wallet on the Starknet mainnet, making wallets smarter and more intuitive. Building on this, the platform has introduced an MPC wallet solution that seamlessly blends security and ease of use.

MPC—short for Multi-Party Computation—is an advanced privacy-preserving technology. Its core advantage is that private keys are never centrally stored in a single location. Instead, using distributed key generation, MPC creates multiple key shards, each securely held by different parties in separate environments. When a transaction needs to be signed, the MPC protocol coordinates all independent key share holders, enabling a collaborative, privacy-preserving signature process without ever assembling the full key.

Simply put, MPC wallets deliver a revolutionary "no mnemonic phrase" user experience that dramatically lowers the entry barrier for everyday users. There's no need to record or safeguard complex recovery phrases. Instead, users set and remember a simple password to manage their crypto assets. This architecture also eliminates the single-point-of-failure risk inherent in traditional wallets, providing far stronger asset protection. The user experience closely mirrors familiar Web2 internet products, underscoring the principle that technical and product innovation, alongside upgraded experiences, can bring more users into the Web3 world with ease.

Four Core Advantages of MPC Wallets

"No Private Key" Experience: Lowering the Entry Barrier

MPC wallets offer an obvious leap forward in user experience compared to EOA (Externally Owned Account) wallets, which most users rely on today. Most notably, users no longer need to memorize or write down complicated seed phrases or private keys. Instead, users can create an MPC wallet simply by signing in and verifying their email—a process so seamless that even crypto newcomers can get started instantly, without any technical obstacles.

Furthermore, the backup process for key shards has been expertly optimized. In just three straightforward steps, users can back up one key shard to the cloud. The intuitive workflow minimizes both learning curve and operational complexity. This Web2-like experience transforms crypto wallets from tools for tech insiders into practical solutions for mainstream users.

Industry-Leading Security Architecture

This MPC wallet leverages a Threshold Signature Scheme (TSS)—a specialized protocol within MPC—and is engineered to meet the strictest industry security standards. It incorporates technologies such as secure large primes, distributed key generation (DKG), distributed signing, and homomorphic encryption. With a 2/3 signature threshold, the TSS protocol maintains the highest level of security across key generation, storage, and usage, ensuring enterprise-grade protection for users.

For public and private key generation, the wallet utilizes quantum-resistant secure large primes as the cryptographic foundation. While generating these high-security keys requires users to wait about one minute, this brief delay provides a level of protection unmatched by many consumer-oriented MPC wallets. As quantum computing advances rapidly, this forward-looking design becomes even more critical.

During private key generation, the platform uses distributed key generation (DKG) to create multiple key shards that "implicitly map to the complete private key" within a collaborative multi-party framework. Crucially, each shard is handled so that one piece never traverses the network, fundamentally eliminating the risk of interception or leakage. Most importantly, the full private key never exists anywhere in the system, so it cannot be stolen.

For transaction signatures, the wallet’s distributed threshold signing ensures the private key remains decentralized throughout the process. Users can sign transactions without ever exposing their private key; the full key is never assembled at any point, dramatically increasing the security of both keys and assets.

By rigorously applying these technologies and protocols, this MPC wallet delivers maximum security and decentralization throughout the entire key lifecycle—from creation and storage to usage.

In contrast, most consumer-facing MPC wallets on the market favor convenience over security. Some share login systems with centralized exchanges for easier onboarding but fail to mitigate security risks. Others use standard large primes instead of quantum-resistant ones, resulting in lower levels of protection.

On every front, this MPC wallet ensures superior security through technical excellence, directly addressing and reinforcing known vulnerabilities in competing products. This provides greater risk resistance and resilience against both known and emerging threats.

Reshare Mechanism & Independent Transaction Passwords: Multi-Layered Protection

This MPC wallet also introduces an advanced Reshare mechanism for key redistribution. When a user logs in on a new device, the key shard stored on the old device is automatically invalidated, and a new shard is generated for the new device. Even if an old device is lost or compromised, its shard cannot be used to steal assets, ensuring robust security.

The wallet also supports an independent transaction password, separate from the login password, exclusively for authorizing transaction signatures. With this design, even if the server holds a key shard, it can only participate in signing if the user enters the correct transaction password and grants explicit permission. This multi-factor verification further strengthens user control and blocks unauthorized transactions.

2/3 Signature Scheme: Absolute User Control

This MPC wallet is among the very few on the market to implement a 2/3 signature scheme for mainstream users, providing individuals with a comprehensive, enterprise-grade MPC solution.

Under the 2/3 signature scheme, the signing threshold is two out of three key shards. The system generates three shards: the first is stored on the user’s current device (for daily signing), the second on the platform’s secure server (also for daily signing), and the third as a backup in iCloud, Google Drive, or similar cloud storage (not used for daily signing, used only for wallet recovery via Reshare).

This design is more decentralized than joint custody models (where user and platform must both cooperate to move funds) and more secure than third-party custody (where the platform controls the private key and could theoretically access user funds). Users always control two of the three shards (device + cloud backup). Even if the platform fails, users can restore and control their assets using their own shards.

Additional security measures include independent generation of secure large primes by each participant, not through a centralized server, ensuring true decentralization during key shard creation. Users can also use the Reshare mechanism to invalidate lost device shards at any time, preventing security issues from device loss.

In summary, this expertly designed 2/3 signature scheme guarantees that only the user has absolute control over the wallet. The platform cannot unilaterally control or transfer assets, truly achieving a non-custodial security model.

How to Create and Use an MPC Wallet

How to Create an MPC Wallet

The MPC wallet creation process is optimized for both new and existing users.

New User Creation:

1. Download and install the wallet app. On the welcome screen, select "Create Wallet," then choose "MPC Wallet."
2. Set a 6-digit wallet password as prompted; this will be your daily login password.
3. Enter your primary email address. The system will send a verification code.
4. Enter the 6-digit code from your email to verify your identity.
5. Set and confirm your MPC transaction password (note: this password authorizes MPC wallet transactions and is distinct from your login password).
6. We recommend selecting "Enable Now" to activate Face ID or fingerprint recognition for greater convenience and security.
7. The system will generate and encrypt key shards, a process that typically takes about one minute—please wait patiently.
8. Once complete, you’ll see the "MPC Wallet" badge in the upper left of the home screen, confirming successful creation and login.

Existing User Creation:

1. In the wallet app, click the wallet name dropdown in the upper left corner of the home screen.
2. Select "Add Wallet," then choose "MPC Wallet."
3. Enter your previously set 6-digit wallet password.
4. Proceed with the prompts from the email step onward, as with new users.

Important: The MPC transaction password is a unique password for your MPC wallet. It is not the same as your wallet login password or any other transaction password. Safeguard this password and do not reuse it elsewhere.

How to Back Up Your MPC Wallet

MPC wallet backup is entirely different from traditional mnemonic backups. The process is much simpler and more intuitive.

Backup Steps:

1. Find and tap the "Backup Now" button on the wallet home screen (usually highlighted).
2. The system will prompt you to select a backup method—choose either iCloud (iOS) or Google Drive (Android).
3. Complete iCloud or Google Drive authentication as prompted.
4. Once verified, the system will automatically back up your encrypted key shard to your selected cloud storage.
5. When backup is complete, the iCloud or Google Drive button will display "Unlink Backup," indicating success.
6. After backup, you can safely transfer, receive, and manage assets in your wallet.

Backup Tips:

• Always back up your wallet immediately after creation to protect your assets.
• The key shard is encrypted—even if someone accesses your cloud storage, they cannot use it without your transaction password.
• If you change your cloud storage account, remember to back up again.
• Regularly check your backup status to ensure your files are complete and valid.

How to Restore Your MPC Wallet

If your wallet app is deleted by mistake or your device is lost or damaged, you can easily restore your wallet using your cloud backup. During restoration, the old device's key shard is automatically invalidated and a new shard is generated on the new device—this is the Reshare mechanism in action.

Restoration Steps:

1. Download and install the wallet app on your new device.
2. On the welcome screen, select "Import Wallet."
3. Choose "MPC Wallet."
4. Set a new 6-digit wallet password (or reuse the original if reinstalling on the same device).
5. Enter the email address previously linked to your MPC wallet.
6. Enter the verification code sent to your email.
7. Select iCloud or Google Drive. The system will automatically retrieve your backed-up key shard.
8. Enter your previously set MPC transaction password to authorize restoration.
9. The system will use the cloud and server shards, generating a new key shard on your device via the Reshare mechanism.
10. When you see "Wallet Import Successful," your MPC wallet has been restored from the cloud backup.
11. After restoration, immediately back up your key shard again on the new device to ensure ongoing asset security.

Restoration Notes:

• Restoration requires your linked email, cloud backup, and MPC transaction password—all three are mandatory.
• The old device's key shard is invalidated after restoration—if someone gets your old device, they cannot access your wallet.
• If you forget your MPC transaction password, restoration is impossible. Safeguard this password at all times.
• After restoring, check your wallet address and asset balance to confirm successful recovery.

Summary and Outlook

This comprehensive guide provides a deep understanding of MPC wallet technology and the full process for creating, backing up, and restoring an MPC wallet. Leveraging advanced cryptography, MPC wallets dramatically boost usability without compromising security, making crypto asset management as straightforward as any mainstream internet app.

MPC wallets' key strengths include: a "no private key" experience (no need to memorize complex mnemonics), enterprise-grade quantum-resistant security, multi-layered protection via Reshare and independent passwords, and a 2/3 signature scheme that guarantees users absolute control. These traits make MPC wallets the ideal bridge for Web2 users stepping into Web3.

As Web3 continues to advance, MPC wallets will keep evolving—delivering even more secure and user-friendly experiences. Whether you're new to crypto or a seasoned veteran, MPC wallets offer reliable protection and convenient management for your digital assets.

FAQ

What is an MPC Wallet? How Does it Differ from a Traditional Crypto Wallet?

An MPC wallet uses multi-party computation to distribute private key custody, eliminating single points of failure. Unlike traditional wallets—where one entity controls the private key—MPC wallets offer superior security and convenience, support multi-signature management, and reduce the risk of asset theft.

How Does an MPC Wallet Keep Assets Secure? What Are Its Advantages over Cold and Hot Wallets?

MPC wallets use key sharding to store private keys across multiple nodes. No single node can access the entire key, dramatically reducing theft risk. Compared to cold wallets, they provide a more convenient interface; compared to hot wallets, they deliver greater security—striking an ideal balance between safety and usability.

How Do I Use an MPC Wallet to Manage Crypto Assets? What Are the Requirements?

Managing crypto assets with an MPC wallet is straightforward. Download the app, register an account, and set a security key. MPC splits private keys across multiple parties, supporting transfers, deposits, and asset queries. All you need is internet access and basic digital literacy to manage your crypto securely and conveniently.

How Are Private Keys Sharded and Stored in an MPC Wallet? What Are the Advantages?

MPC wallets break the private key into several shards, each stored on different devices or servers. No single shard can reconstruct the key—multiple shards must work together for a signature. This sharply reduces theft risk—even if one shard leaks, assets remain safe—while boosting management flexibility and truly decentralizing control.

How Many Steps Are Involved in MPC Wallet Transactions? Does This Increase Complexity?

MPC wallet transactions are streamlined and efficient, requiring just three steps: confirm transaction details, approve with multi-signature, and finalize. Compared to traditional wallets, MPC wallets optimize the process, enhancing both convenience and security without added complexity.

Which Blockchain Networks and Tokens Do MPC Wallets Support?

MPC wallets support major blockchains—including Ethereum, Bitcoin, Solana, and Polygon—as well as a wide array of leading tokens and ecosystem assets. Check the app for the full list of supported networks and tokens, spanning DeFi, NFTs, and more.

What Risks and Limitations Exist for MPC Wallets? What Should Users Watch Out For?

Main risks include network attacks, user error, and the complexity of key shard management. Users should keep devices secure, properly back up recovery information, avoid unsafe networks, and regularly update their wallet. Choosing reputable platforms and following security best practices are essential to minimize risks.

How Does Recovery Work in an MPC Wallet? What If a Key Shard Is Lost?

MPC wallets split private keys into several shards stored separately. Even if one shard is lost, you can restore your wallet as long as the majority of shards remain (usually more than half). Set up multiple recovery methods and backups to ensure your assets are always safe.