WakuChat Protocol #73
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jazzz
commented
Jul 15, 2025
standards/application/wakuchat.md
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| Naively, conversation_ids are sufficient to allow clients to determine how to decrypt a payload. As the conversation_id corresponds to the ConversationType which defines how payloads are encdoded, and the encryption state is linked to the specific identifier. However this would leak Conversation metadata, as observers could determine which payloads belonged together into a group. Instead a hint is used which allows clients to check if this payload is of interest. A ConversationHint does not contain identifying information. | ||
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| ConversationHints are computed by using a salted hash of the `conversationId`. specifically defined as `lowercase_hex(blake2s(salt || conversation_id))`. |
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This approach to hinting offers insufficient privacy protections. A strategy using either SealedSender or Ratcheting Private Identifiers would be better suited.
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This PR adds the initial specification for WakuChat, a decentralized communication protocol optimized for Waku.