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Update specs/waku/v2/waku-filter.md

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Co-authored-by: Oskar Thorén <ot@oskarthoren.com>
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Sanaz Taheri Boshrooyeh 2020-12-18 13:19:26 -08:00
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@ -56,6 +56,7 @@ protocol to query for a recent time window, provided it is acceptable to do
frequent polling.
# Security Requirements
The `WakuFilter` protocol supports the following security features.
- **Prevention of Denial of Service (DoS)**: Denial of service signifies the case where an adversarial requesting node exhausts a full node's bandwidth and make it unavailable to the rest of the system. This may happen by either submitting a content filter covering all the existing contents (effectively applying no filter) or by launching a Sybil attack (i.e., creating a large number of nodes) and loading the full node with a mass of subscription requests.