Bitcoin DeFi Security: Securing Your Assets in Bitcoin Layer 2
10 May 2024

As the approval of Bitcoin spot ETFs done at the onset of 2024 and the just-concluded halving event, the investment value of Bitcoin continues to be unearthed, and its DeFi ecosystem is experiencing explosive growth.

According to Bitcoin block explorers, as of the latest data, the Bitcoin network has reached a peak of 169,909 unconfirmed transactions, with the highest ever recorded at 440,765. Concurrently, transaction fees on the Bitcoin network have skyrocketed. Bitcoin currently faces issues such as slow transaction speeds, long confirmation times, and high fees, all of which limit the development of the Bitcoin ecosystem and its wider adoption. To address these issues, Bitcoin's Layer 2 scaling solutions (BTC Layer 2) have emerged.

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Layer 2 refers to the technologies that transfer a portion of Bitcoin transactions off the main chain to side chains or other chains for processing, enhancing transaction efficiency and reducing costs. Major Layer 2 solutions include the Lightning Network, sidechains, and Rollups.

BTC Layer 2 solutions are an effective way to address Bitcoin's scaling challenges. They help Bitcoin better meet user demands, foster the flourishing development of the Bitcoin ecosystem, and open up new realms of possibility for investors.

Catching the Windfall in the Bull Market

As the Bitcoin halving event approaches, the cryptocurrency market is in a state of high excitement. The halving is expected to reduce Bitcoin's supply, potentially driving up its price and spurring the growth of the entire cryptocurrency market.

In light of the positive expectations surrounding the Bitcoin halving, the BTC DeFi (decentralized finance) market also faces new development opportunities. DeFi applications have higher demands for transaction speed and throughput, which Layer 2 can readily fulfill. Thus, the proliferation of Layer 2 technology lays the groundwork for an explosion in BTC DeFi.

For discerning investors, now is an optimal time to position themselves in BTC DeFi. With a burgeoning array of BTC DeFi applications, investors can engage in various innovative financial activities such as lending, trading, and derivatives, all while earning considerable returns.

With the dual boost of the Bitcoin halving and the DeFi bull market, the BTC DeFi market harbors immense investment potential. Investors who position themselves early can share in the bountiful returns of this financial feast.


Security Challenges: Risks That Cannot Be Overlooked

However, where there is opportunity, there is challenge. DeFi projects often involve large sums of money, making security a top priority. In the BTC Layer 2 realm, securely storing and managing the native BTC assets deposited by users to prevent hacking is an urgent issue to address.

Key Components of the Layer 2 Security Model

The Layer 2 security model consists of several key components, each critical to the system's overall security:

  1. Contracts/Official Bridges: 

Serve as the conduit between Layer 2 and Layer 1, transferring transaction data and ensuring consistency. Vulnerabilities here could lead to stolen funds or altered transactions.

  1. Censorship-Resistant Withdrawal Function: 

Allows users to withdraw their funds under any circumstances, even if the Layer 2 network fails or shuts down. The inability to withdraw when necessary can undermine trust and security.

  1. Data Availability (DA) Layer: 

Responsible for storing the state data of Layer 2, including transactions and account information. Its reliability directly impacts Layer 2 security.

  1. Fraud Proofs/Validity Proof Systems: 

Verify the validity of Layer 2 transactions to prevent fraudulent activities. Flaws here could allow fraudulent transactions to be confirmed, causing loss of funds.

According to the "weakest link" principle, the overall security of the Layer 2 model depends on its most vulnerable part. Any security gap in the components could lead to a system collapse and financial loss for users. Therefore, all key components must be secure in the design and deployment of Layer 2 systems.

ChainUp Custody’s MPC Self-Custody Solution: Safeguarding BTC Layer 2 Assets

ChainUp Custody’s MPC (Multi-Party Computation) self-custody solution offers a secure and flexible option for Bitcoin bridging and can be extended to a wider range of applications. ChainUp Custody has already partnered with several BTC Layer 2 projects to implement the MPC self-custody solution, significantly enhancing the security of Layer 2 assets.

The MPC self-custody solution is a cryptographic security approach that effectively addresses asset security issues within the Bitcoin Layer 2 financial ecosystem. Its core principle is to distribute the storage of keys across multiple nodes, preventing any single node from controlling the key alone and significantly reducing the risk of attacks.

In the Layer 2 security model, the MPC self-custody solution can be applied to several key components, such as distributing keys across nodes to prevent theft or alteration of transaction data and ensuring transaction validation to prevent fraudulent transactions from being confirmed. It also uses a multi-node redundancy mechanism to ensure system availability and security, even if one node fails.

Advantages of ChainUp Custody’s MPC Self-Custody Solution

  1. Enhanced Asset Security: 

The essence of ChainUp Custody’s MPC self-custody solution is the partitioning and distribution of private keys among multiple parties, each holding only a fragment. A transaction signature can only be completed through the collaboration of multiple parties, thus greatly increasing asset security.

  1. Strengthened Bridging Security: 

In the BTC Layer 2 financial ecosystem, bridging assets from the main Bitcoin chain to Layer 2 networks is key. Traditional bridging solutions, often controlled by centralized entities, pose significant security risks. ChainUp Custody’s MPC self-custody solution offers a more secure bridging mechanism by decentralizing asset management and control, protecting assets from tampering and attacks.

  1. Empowering User Control: 

With ChainUp Custody’s MPC self-custody solution, users can customize their security strategies by choosing different participating parties. For instance, they can opt to distribute private key shards among reputable institutions or store some shards in their hardware wallets, offering flexibility and greater asset control.

  1. Fostering Ecosystem Development: 

The security, controllability, and flexibility of ChainUp Custody’s MPC self-custody solution can effectively lower the entry barriers to the Bitcoin Layer 2 financial ecosystem, attracting more users and institutions. This benefits the rapid development and prosperity of the ecosystem.

ChainUp Custody joins hands with BTC Layer 2 projects to build a secure and thriving DeFi ecosystem.

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