If you’ve carefully followed these past few lessons, you should realize that the underlying logic has consistently been about one thing: security. Whether it’s the Sovereignty Model or the Shared Security Model, they all revolve around this core concept. It’s just like a competitive game—only characters that stay alive can deal damage.

Projects are the same. Only by operating securely can they even begin to talk about future returns and long-term vision.

However, as we mentioned in the Shared Security Model, in blockchain systems, not every project has the ability to build and maintain its own “security system.”

Because building a security system means:

• A validator network

• Sufficient staked assets

• A stable operating environment

All of these require time and cost, and for many new projects, this is a very high barrier. Moreover, many projects are not willing to share security with others, because sharing also means sharing risk.

So the question is: is there a way to have independent usage + low entry barrier security? Yes.

That is exactly today’s topic: instead of building it yourself, you “lease” security — the Security Leasing Model.

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Yes, you heard that right — leasing

Security Leasing refers to a model where a project connects to an external validation or security network and obtains security guarantees by paying a certain cost.

The core logic is very intuitive: security doesn’t have to be built by yourself — it can also be used through payment.

In fact, the emergence of this model is also a result of practical constraints. As mentioned before, in blockchain systems, security is a scarce resource.

It comes from:

• Large amounts of staked assets

• Distributed validators

• Stable consensus mechanisms

But these resources are usually concentrated in a few mature networks. For new projects, it is very difficult to reach the same level in a short period of time.

So instead of rebuilding everything, it is more efficient to directly use existing resources — treating security as a service.

Outsourcing complex security systems

The essence of Security Leasing is to decouple “security capability” from a specific network.

Originally, security is bound to a single chain. But in this model, security can be used independently. Projects can connect to an existing security network and, by paying fees or providing incentives, let that network protect them.

This means security shifts from being an “exclusive resource” to a “distributable resource.”

Structurally, this forms two main roles:

• Security providers (validators or networks)

• Security users (applications or chains)

• Connected through a set of rules

In this relationship, the security provider is responsible for validating data, maintaining consensus, and executing security rules, while the user focuses only on its own business logic.

How Security Leasing is implemented

In practical design, Security Leasing usually relies on validator networks and protocol mechanisms.

Since projects do not directly control these validators, they connect through predefined rules, allowing validators to participate in their system’s validation process.

Validators earn rewards based on task execution while taking on corresponding responsibilities  

If errors or malicious behavior occur, penalty mechanisms are triggered

Security is achieved through “economic incentives + constraint mechanisms”

From an implementation perspective, the key is not the technology itself, but the connection mechanism.

Projects need to convert their system outputs into forms that can be externally verified, such as state data or proof information.

Validators then verify this data based on unified rules. If validation passes, the system continues running; if issues arise, corresponding actions are triggered.

This process is essentially external verification.

External verification reshapes system boundaries

In traditional models, validation happens internally — all participants operate within the same network.

But under the Security Leasing Model, validation is “outsourced” to an external network.

The project itself no longer ensures final security, but relies on a larger validation system.

This leads to a direct consequence:
the system becomes lighter, but more dependent on rules.

Because if the rules are unclear, or the validation process has flaws, then even connecting to a strong validation network does not guarantee real security.

Key components in real-world operation

In practice, this model usually includes several core elements:

• Access mechanism (how to connect to the security network)

• Validation rules (how correctness is determined)

• Incentive mechanism (how rewards are distributed)

• Penalty mechanism (how violations are handled)

These elements must satisfy several conditions:

The access process must be simple, otherwise integration costs become too high

• Validation logic must be unified, otherwise validators may produce inconsistent results

• Data formats must be standardized so external systems can interpret them correctly

• Rules must be executable, not just theoretical designs

• Penalty mechanisms must be clear, otherwise real constraints cannot be enforced

Among these, the most critical factor is clarity of rules.

If validation standards are ambiguous, or penalty mechanisms are incomplete, then even with access to a powerful security network, true protection cannot be achieved.

Incentives and long-term balance

At the same time, incentive mechanisms must be well designed.

Validators need sufficient motivation to participate, otherwise security cannot be sustained.

In the long run, whether Security Leasing can operate stably depends on one key balance:

whether returns can adequately compensate for risks

• If validators take on additional responsibilities but receive insufficient rewards, participation will decline

• If incentives are too high, system costs may become unsustainable

Therefore, system design often requires continuous adjustment:

• Whether reward distribution is reasonable

• Whether risk allocation is appropriate

• Whether resources across systems are balanced

• Whether validation load remains manageable

Overall, Security Leasing is not a one-time design, but an evolving mechanism that requires ongoing optimization. Only when rules, incentives, and constraints reach a stable balance can the model function effectively.

Relationship with Restaking and Shared Security

• Shared Security provides the structure

• Restaking provides the assets

• Security Leasing provides the usage model

You can think of it like this: one defines the source, one handles the allocation, and one enables the access.

1-minute recap

• Security Leasing = leasing security capability

• Instead of building it yourself, you connect to existing networks

• Core value: lowering barriers and improving efficiency

Conclusion

The evolution of blockchain is not just about technological upgrades, but also about how resources are utilized.

The Security Leasing Model transforms security from something that must be built, into something that can be acquired.

When security becomes a leasable capability, more projects can enter the space, and the overall ecosystem becomes more flexible.