After the $320 Million Liquid Network Incident: One Defense Falls, What Can Digital Asset Platforms Still Protect?

Recent security incidents have once again brought the digital asset industry back to a familiar question: What exactly makes a platform "secure"?

In early September, a major security incident occurred on the Bitcoin sidechain Liquid Network. Attackers exploited a validation vulnerability in the Elements software, resulting in the transfer of approximately 4,000 BTC, worth about $320 million at the time of the incident. Notably, the associated PAK and Federation keys themselves were not compromised. This raises a more important question: When the keys themselves are not breached, why can an asset transfer that should never have happened still pass through the system?

Similar risks have appeared in other areas. In August, attackers exploited a critical security vulnerability in Cosmos EVM to launch attacks on multiple networks, with six networks actually exploited. The vulnerability had previously been reported through a bug bounty program. In July, Triple-A suffered a social engineering attack, where attackers obtained credentials of relevant personnel and further accessed the operational environment, ultimately leading to the transfer of some company-owned assets. However, because customer funds were held separately in trust accounts and isolated from the compromised operational environment, they were not affected.

The causes of the three incidents are different, but they all point to a more realistic problem: Security incidents may be difficult to completely avoid, but when one link in code, personnel, or permissions is breached, where does the risk stop?

What truly needs to be defended is not just "being breached," but how far the risk can travel

A more important question than "was there an attack" is: After the first line of defense fails, how far can the attacker go? If one account is compromised, is that enough to complete critical asset operations? If one permission is breached, can the attacker continue to access more core systems? When problems occur in the online environment, how much core assets are actually exposed in the attack path?

This is also an important lesson from recent incidents: The ultimate impact of an attack depends not only on what the attacker breached, but also on how many lines of defense remain in the system after the breach.

If a compromised account can directly access core permissions, or if a problem in the online environment can directly affect a large amount of core assets, then any weak link can be quickly amplified. Conversely, if there are multiple layers of isolation between permissions, critical operations, risk monitoring, and asset storage, a single breach may not necessarily lead to a complete collapse.

In other words, measuring a platform's security capability is not just about "whether the first door can hold," but also: After the first door falls, how many more doors are there?

Along the attack chain, where is BIT's "next door"?

Recently, the global digital financial services platform BIT (formerly Matrixport) released the "BIT Trust Whitepaper" V2.0 (https://www.bit.com/whitepaper). If we re-read this whitepaper through the lens of "what happens after the first line of defense fails," one notable point is that BIT's security system does not rely on a single line of defense, but rather establishes multiple layers of protection between identity, permissions, operations, and assets.

For example, obtaining account credentials does not mean the attacker has all the permissions needed to complete critical asset operations. The whitepaper reveals that BIT uses the principle of least privilege to limit the systems and operations employees can access. Critical operations such as asset transfers, account security, permission changes, and transaction instruction generation and review require at least two authorized personnel to participate together. Taking Cactus Custody as an example, this layered approach also extends to institutional-grade digital asset custody scenarios.

Passing identity verification does not mean subsequent operations get a "green light" all the way. BIT continuously monitors abnormal logins, abnormal devices, abnormal withdrawals, and other behaviors. On the asset side, most digital assets are stored in cold wallets, further reducing the exposure of core assets when problems occur in the online environment.

Putting these mechanisms together, BIT's security logic becomes more intuitive: A breached identity does not mean gaining all permissions; gaining one permission does not mean being able to independently complete critical operations; passing identity verification does not mean subsequent actions are no longer subject to risk assessment; problems in the online environment do not mean all core assets are exposed at the same time.

What truly determines how far an attack can ultimately go is precisely these "does not mean" statements. This does not mean that any attack can be completely avoided, but it means that even if one line of defense fails, there is still an opportunity to identify anomalies, restrict permissions, or isolate risks.

The gap in security often lies after the first door falls.

When a risk is discovered, who has the authority to truly press the "stop button"?

But having more technical defenses is not the whole story. In the Cosmos EVM incident, a notable detail is that the vulnerability had previously been reported through a bug bounty program, but based on the information available at the time, it was initially judged not to cause fund losses on known production network configurations.

This also exposes another often overlooked problem: Discovering a risk does not mean the risk has been accurately assessed and fully addressed.

After a vulnerability is submitted, who decides how severe it is? If the security team believes the risk is unacceptable, do they have the authority to stop the product from going live? When business progress conflicts with security judgment, who has the final say?

The "BIT Trust Whitepaper" V2.0 reveals that when product plans, requirements, architecture, or launch changes involve major security risks, or fail to meet security baselines and compliance requirements, the security team has "veto power" to suspend related activities and require rectification and re-review before proceeding.

What is truly noteworthy about this mechanism is not just an additional approval step, but that it answers a very practical question: When a risk actually emerges, is there someone with the authority to say "no"? For a security system, the ability to discover problems is certainly important, but allowing security judgment to truly influence business decisions also determines whether a line of defense is merely written in policy or can actually function.

As business becomes more complex, "security" is not just about assets in wallets

As digital financial platforms begin to connect different types of assets and financial infrastructure such as digital assets, US stocks, and RWA, security issues are no longer limited to wallets and accounts. Who handles assets, which institutions they pass through, and where they are cleared and held have also become important parts of how users assess risk.

This is also where the "BIT Trust Whitepaper" V2.0 further expands the security and trust system. In addition to risk control and security measures, the whitepaper also reveals the regulatory, audit, and independent verification arrangements corresponding to different business entities, allowing outsiders to further judge: Who is responsible for what, which mechanisms can be verified, and where these mechanisms cover.

Taking BIT's US stock business as an example, its securities business is operated by Matrix Gelephu Pte. Ltd. and regulated by GFSO. The related business also connects to US licensed financial institutions and corresponding clearing and custody infrastructure.

For ordinary users, these seemingly complex financial arrangements ultimately boil down to a few simple questions: Who handles my assets? What steps do they go through? What are the responsibilities of different institutions? Can the identities and regulatory status of these institutions be verified?

This is where "verifiability" truly matters—security cannot rely solely on what the platform says about itself, but also on what users and outsiders can verify.

Looking back at Liquid Network, Cosmos EVM, and Triple-A, the entry points of the three incidents are completely different, but they all remind the market: No line of defense should be assumed to never fail. What truly widens the security gap may not be a single security technology itself, but who can establish enough isolation and checks and balances among identity, permissions, operations, assets, and organizational decision-making, making it harder for a local breach to evolve into a complete collapse.

From this perspective, what is noteworthy about the "BIT Trust Whitepaper" V2.0 is not just how many security measures it lists, but whether these measures can form a complete defense system: If one link fails, there is another layer; if the next layer fails, there is still an opportunity to continue identifying, blocking, and isolating risks.

For digital asset platforms, "never having been attacked" may be difficult to promise permanently. But another thing can be continuously built: True security means that even if one line of defense fails, a single breach does not easily evolve into a complete collapse. And when these defenses not only exist but can also be continuously verified by outsiders, "trust" is no longer just a statement made by the platform itself.