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title: Research in Progress
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The following features are currently experimental and under research and initial implementation:

**Economic Spam resistance**:
We aim to enable an incentivized spam protection technique to enhance `WAKU-RELAY` by using rate limiting nullifiers.
More details on this can be found in [17/WAKU2-RLN-RELAY](https://rfc.vac.dev/spec/17).
In this advanced method, peers are limited to a certain rate of messaging per epoch and an immediate financial penalty is enforced for spammers who break this rate.

**Prevention of Denial of Service (DoS) and Node Incentivization**:
Denial of service signifies the case where an adversarial node exhausts another node's service capacity (e.g., by making a large number of requests) and makes it unavailable to the rest of the system.
DoS attack is to be mitigated through the accounting model as described in [18/WAKU2-SWAP](https://rfc.vac.dev/spec/18).
In a nutshell, peers have to pay for the service they obtain from each other.
In addition to incentivizing the service provider, accounting also makes DoS attacks costly for malicious peers.
The accounting model can be used in `13/WAKU2-STORE` and `12/WAKU2-FILTER` to protect against DoS attacks.

Additionally, this gives node operators who provide a useful service to the network an incentive to perform that service.