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<ol class="chapter"><li class="chapter-item expanded affix "><a href="../../index.html">Introduction</a></li><li class="chapter-item expanded "><a href="../../vac/index.html"><strong aria-hidden="true">1.</strong> Vac</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../vac/1/coss.html"><strong aria-hidden="true">1.1.</strong> 1/COSS</a></li><li class="chapter-item expanded "><a href="../../vac/2/mvds.html"><strong aria-hidden="true">1.2.</strong> 2/MVDS</a></li><li class="chapter-item expanded "><a href="../../vac/3/remote-log.html"><strong aria-hidden="true">1.3.</strong> 3/Remote Log</a></li><li class="chapter-item expanded "><a href="../../vac/4/mvds-meta.html"><strong aria-hidden="true">1.4.</strong> 4/MVDS Meta</a></li><li class="chapter-item expanded "><a href="../../vac/25/libp2p-dns-discovery.html"><strong aria-hidden="true">1.5.</strong> 25/Libp2p DNS Discovery</a></li><li class="chapter-item expanded "><a href="../../vac/32/rln-v1.html"><strong aria-hidden="true">1.6.</strong> 32/RLN-V1</a></li><li class="chapter-item expanded "><a href="../../vac/raw/index.html"><strong aria-hidden="true">1.7.</strong> Raw</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../vac/raw/consensus-hashgraphlike.html"><strong aria-hidden="true">1.7.1.</strong> Consensus Hashgraphlike</a></li><li class="chapter-item expanded "><a href="../../vac/raw/decentralized-messaging-ethereum.html"><strong aria-hidden="true">1.7.2.</strong> Decentralized Messaging Ethereum</a></li><li class="chapter-item expanded "><a href="../../vac/raw/eth-mls-offchain.html"><strong aria-hidden="true">1.7.3.</strong> ETH MLS Offchain</a></li><li class="chapter-item expanded "><a href="../../vac/raw/eth-mls-onchain.html"><strong aria-hidden="true">1.7.4.</strong> ETH MLS Onchain</a></li><li class="chapter-item expanded "><a href="../../vac/raw/deleted/eth-secpm.html"><strong aria-hidden="true">1.7.5.</strong> ETH SecPM</a></li><li class="chapter-item expanded "><a href="../../vac/raw/gossipsub-tor-push.html"><strong aria-hidden="true">1.7.6.</strong> Gossipsub Tor Push</a></li><li class="chapter-item expanded "><a href="../../vac/raw/logos-capability-discovery.html"><strong aria-hidden="true">1.7.7.</strong> Logos Capability Discovery</a></li><li class="chapter-item expanded "><a href="../../vac/raw/mix.html"><strong aria-hidden="true">1.7.8.</strong> Mix</a></li><li class="chapter-item expanded "><a href="../../vac/raw/noise-x3dh-double-ratchet.html"><strong aria-hidden="true">1.7.9.</strong> Noise X3DH Double Ratchet</a></li><li class="chapter-item expanded "><a href="../../vac/raw/rln-interep-spec.html"><strong aria-hidden="true">1.7.10.</strong> RLN Interep Spec</a></li><li class="chapter-item expanded "><a href="../../vac/raw/rln-stealth-commitments.html"><strong aria-hidden="true">1.7.11.</strong> RLN Stealth Commitments</a></li><li class="chapter-item expanded "><a href="../../vac/raw/rln-v2.html"><strong aria-hidden="true">1.7.12.</strong> RLN-V2</a></li><li class="chapter-item expanded "><a href="../../vac/raw/sds.html"><strong aria-hidden="true">1.7.13.</strong> SDS</a></li></ol></li><li class="chapter-item expanded "><a href="../../vac/template.html"><strong aria-hidden="true">1.8.</strong> Template</a></li></ol></li><li class="chapter-item expanded "><a href="../../waku/index.html"><strong aria-hidden="true">2.</strong> Waku</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../waku/standards/core/index.html"><strong aria-hidden="true">2.1.</strong> Standards - Core</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../waku/standards/core/10/waku2.html"><strong aria-hidden="true">2.1.1.</strong> 10/Waku2</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/11/relay.html"><strong aria-hidden="true">2.1.2.</strong> 11/Relay</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/12/filter.html"><strong aria-hidden="true">2.1.3.</strong> 12/Filter</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/13/store.html"><strong aria-hidden="true">2.1.4.</strong> 13/Store</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/14/message.html"><strong aria-hidden="true">2.1.5.</strong> 14/Message</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/15/bridge.html"><strong aria-hidden="true">2.1.6.</strong> 15/Bridge</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/17/rln-relay.html"><strong aria-hidden="true">2.1.7.</strong> 17/RLN Relay</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/19/lightpush.html"><strong aria-hidden="true">2.1.8.</strong> 19/Lightpush</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/31/enr.html"><strong aria-hidden="true">2.1.9.</strong> 31/ENR</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/33/discv5.html"><strong aria-hidden="true">2.1.10.</strong> 33/Discv5</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/34/peer-exchange.html"><strong aria-hidden="true">2.1.11.</strong> 34/Peer Exchange</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/36/bindings-api.html"><strong aria-hidden="true">2.1.12.</strong> 36/Bindings API</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/64/network.html"><strong aria-hidden="true">2.1.13.</strong> 64/Network</a></li><li class="chapter-item expanded "><a href="../../waku/standards/core/66/metadata.html"><strong aria-hidden="true">2.1.14.</strong> 66/Metadata</a></li></ol></li><li class="chapter-item expanded "><a href="../../waku/standards/application/index.html"><strong aria-hidden="true">2.2.</strong> Standards - Application</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../waku/standards/application/20/toy-eth-pm.html"><strong aria-hidden="true">2.2.1.</strong> 20/Toy ETH PM</a></li><li class="chapter-item expanded "><a href="../../waku/standards/application/26/payload.html"><strong aria-hidden="true">2.2.2.</strong> 26/Payload</a></li><li class="chapter-item expanded "><a href="../../waku/standards/application/53/x3dh.html"><strong aria-hidden="true">2.2.3.</strong> 53/X3DH</a></li><li class="chapter-item expanded "><a href="../../waku/standards/application/54/x3dh-sessions.html"><strong aria-hidden="true">2.2.4.</strong> 54/X3DH Sessions</a></li></ol></li><li class="chapter-item expanded "><a href="../../waku/standards/legacy/index.html"><strong aria-hidden="true">2.3.</strong> Standards - Legacy</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../waku/standards/legacy/6/waku1.html"><strong aria-hidden="true">2.3.1.</strong> 6/Waku1</a></li><li class="chapter-item expanded "><a href="../../waku/standards/legacy/7/data.html"><strong aria-hidden="true">2.3.2.</strong> 7/Data</a></li><li class="chapter-item expanded "><a href="../../waku/standards/legacy/8/mail.html"><strong aria-hidden="true">2.3.3.</strong> 8/Mail</a></li><li class="chapter-item expanded "><a href="../../waku/standards/legacy/9/rpc.html"><strong aria-hidden="true">2.3.4.</strong> 9/RPC</a></li></ol></li><li class="chapter-item expanded "><a href="../../waku/informational/index.html"><strong aria-hidden="true">2.4.</strong> Informational</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../waku/informational/22/toy-chat.html"><strong aria-hidden="true">2.4.1.</strong> 22/Toy Chat</a></li><li class="chapter-item expanded "><a href="../../waku/informational/23/topics.html"><strong aria-hidden="true">2.4.2.</strong> 23/Topics</a></li><li class="chapter-item expanded "><a href="../../waku/informational/27/peers.html"><strong aria-hidden="true">2.4.3.</strong> 27/Peers</a></li><li class="chapter-item expanded "><a href="../../waku/informational/29/config.html"><strong aria-hidden="true">2.4.4.</strong> 29/Config</a></li><li class="chapter-item expanded "><a href="../../waku/informational/30/adaptive-nodes.html"><strong aria-hidden="true">2.4.5.</strong> 30/Adaptive Nodes</a></li></ol></li><li class="chapter-item expanded "><a href="../../waku/deprecated/index.html"><strong aria-hidden="true">2.5.</strong> Deprecated</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../waku/deprecated/5/waku0.html"><strong aria-hidden="true">2.5.1.</strong> 5/Waku0</a></li><li class="chapter-item expanded "><a href="../../waku/deprecated/16/rpc.html"><strong aria-hidden="true">2.5.2.</strong> 16/RPC</a></li><li class="chapter-item expanded "><a href="../../waku/deprecated/18/swap.html"><strong aria-hidden="true">2.5.3.</strong> 18/Swap</a></li><li class="chapter-item expanded "><a href="../../waku/deprecated/fault-tolerant-store.html"><strong aria-hidden="true">2.5.4.</strong> Fault Tolerant Store</a></li></ol></li></ol></li><li class="chapter-item expanded "><a href="../../nomos/index.html"><strong aria-hidden="true">3.</strong> Nomos</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../nomos/raw/index.html"><strong aria-hidden="true">3.1.</strong> Raw</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../nomos/raw/nomosda-encoding.html"><strong aria-hidden="true">3.1.1.</strong> NomosDA Encoding</a></li><li class="chapter-item expanded "><a href="../../nomos/raw/nomosda-network.html"><strong aria-hidden="true">3.1.2.</strong> NomosDA Network</a></li><li class="chapter-item expanded "><a href="../../nomos/raw/p2p-hardware-requirements.html"><strong aria-hidden="true">3.1.3.</strong> P2P Hardware Requirements</a></li><li class="chapter-item expanded "><a href="../../nomos/raw/p2p-nat-solution.html"><strong aria-hidden="true">3.1.4.</strong> P2P NAT Solution</a></li><li class="chapter-item expanded "><a href="../../nomos/raw/p2p-network-bootstrapping.html"><strong aria-hidden="true">3.1.5.</strong> P2P Network Bootstrapping</a></li><li class="chapter-item expanded "><a href="../../nomos/raw/p2p-network.html"><strong aria-hidden="true">3.1.6.</strong> P2P Network</a></li><li class="chapter-item expanded "><a href="../../nomos/raw/sdp.html"><strong aria-hidden="true">3.1.7.</strong> SDP</a></li></ol></li><li class="chapter-item expanded "><a href="../../nomos/deprecated/index.html"><strong aria-hidden="true">3.2.</strong> Deprecated</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../nomos/deprecated/claro.html"><strong aria-hidden="true">3.2.1.</strong> Claro</a></li></ol></li></ol></li><li class="chapter-item expanded "><a href="../../codex/index.html"><strong aria-hidden="true">4.</strong> Codex</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../codex/raw/index.html"><strong aria-hidden="true">4.1.</strong> Raw</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../codex/raw/codex-block-exchange.html"><strong aria-hidden="true">4.1.1.</strong> Block Exchange</a></li><li class="chapter-item expanded "><a href="../../codex/raw/codex-marketplace.html"><strong aria-hidden="true">4.1.2.</strong> Marketplace</a></li></ol></li></ol></li><li class="chapter-item expanded "><a href="../../status/index.html"><strong aria-hidden="true">5.</strong> Status</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../status/24/curation.html"><strong aria-hidden="true">5.1.</strong> 24/Curation</a></li><li class="chapter-item expanded "><a href="../../status/28/featuring.html"><strong aria-hidden="true">5.2.</strong> 28/Featuring</a></li><li class="chapter-item expanded "><a href="../../status/55/1to1-chat.html"><strong aria-hidden="true">5.3.</strong> 55/1-to-1 Chat</a></li><li class="chapter-item expanded "><a href="../../status/56/communities.html"><strong aria-hidden="true">5.4.</strong> 56/Communities</a></li><li class="chapter-item expanded "><a href="../../status/61/community-history-service.html"><strong aria-hidden="true">5.5.</strong> 61/Community History Service</a></li><li class="chapter-item expanded "><a href="../../status/62/payloads.html"><strong aria-hidden="true">5.6.</strong> 62/Payloads</a></li><li class="chapter-item expanded "><a href="../../status/63/keycard-usage.html"><strong aria-hidden="true">5.7.</strong> 63/Keycard Usage</a></li><li class="chapter-item expanded "><a href="../../status/65/account-address.html"><strong aria-hidden="true">5.8.</strong> 65/Account Address</a></li><li class="chapter-item expanded "><a href="../../status/71/push-notification-server.html"><strong aria-hidden="true">5.9.</strong> 71/Push Notification Server</a></li><li class="chapter-item expanded "><a href="../../status/raw/index.html"><strong aria-hidden="true">5.10.</strong> Raw</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../status/raw/simple-scaling.html"><strong aria-hidden="true">5.10.1.</strong> Simple Scaling</a></li><li class="chapter-item expanded "><a href="../../status/raw/status-app-protocols.html"><strong aria-hidden="true">5.10.2.</strong> Status App Protocols</a></li><li class="chapter-item expanded "><a href="../../status/raw/status-mvds.html"><strong aria-hidden="true">5.10.3.</strong> Status MVDS</a></li><li class="chapter-item expanded "><a href="../../status/raw/url-data.html"><strong aria-hidden="true">5.10.4.</strong> URL Data</a></li><li class="chapter-item expanded "><a href="../../status/raw/url-scheme.html"><strong aria-hidden="true">5.10.5.</strong> URL Scheme</a></li></ol></li><li class="chapter-item expanded "><a href="../../status/deprecated/index.html"><strong aria-hidden="true">5.11.</strong> Deprecated</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../status/deprecated/3rd-party.html"><strong aria-hidden="true">5.11.1.</strong> 3rd Party</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/account.html"><strong aria-hidden="true">5.11.2.</strong> Account</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/client.html"><strong aria-hidden="true">5.11.3.</strong> Client</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/dapp-browser-API-usage.html"><strong aria-hidden="true">5.11.4.</strong> Dapp Browser API Usage</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/eips.html"><strong aria-hidden="true">5.11.5.</strong> EIPs</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/ethereum-usage.html"><strong aria-hidden="true">5.11.6.</strong> Ethereum Usage</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/group-chat.html"><strong aria-hidden="true">5.11.7.</strong> Group Chat</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/IPFS-gateway-for-sticker-Pack.html"><strong aria-hidden="true">5.11.8.</strong> IPFS Gateway for Sticker Pack</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/keycard-usage-for-wallet-and-chat-keys.html"><strong aria-hidden="true">5.11.9.</strong> Keycard Usage for Wallet and Chat Keys</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/notifications.html"><strong aria-hidden="true">5.11.10.</strong> Notifications</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/payloads.html"><strong aria-hidden="true">5.11.11.</strong> Payloads</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/push-notification-server.html"><strong aria-hidden="true">5.11.12.</strong> Push Notification Server</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/secure-transport.html"><strong aria-hidden="true">5.11.13.</strong> Secure Transport</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/waku-mailserver.html"><strong aria-hidden="true">5.11.14.</strong> Waku Mailserver</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/waku-usage.html"><strong aria-hidden="true">5.11.15.</strong> Waku Usage</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/whisper-mailserver.html" class="active"><strong aria-hidden="true">5.11.16.</strong> Whisper Mailserver</a></li><li class="chapter-item expanded "><a href="../../status/deprecated/whisper-usage.html"><strong aria-hidden="true">5.11.17.</strong> Whisper Usage</a></li></ol></li></ol></li></ol>
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<main>
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<h1 id="whisper-mailserver"><a class="header" href="#whisper-mailserver">WHISPER-MAILSERVER</a></h1>
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<div class="rfc-meta">
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<table>
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<tr><th>Name</th><td>Whisper mailserver</td></tr>
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<tr><th>Status</th><td>deprecated</td></tr>
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<tr><th>Editor</th><td>Filip Dimitrijevic <filip@status.im></td></tr>
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<tr><th>Contributors</th><td>Adam Babik <adam@status.im><br>Oskar Thorén <oskar@status.im></td></tr>
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</table>
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</div>
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<!-- timeline:start -->
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<h2 id="timeline"><a class="header" href="#timeline">Timeline</a></h2>
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<ul>
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<li><strong>2025-12-22</strong> — <a href="https://github.com/vacp2p/rfc-index/blob/b1a578393edf8487ccc97a5f25b25af9bf41efb3/docs/status/deprecated/whisper-mailserver.md"><code>b1a5783</code></a> — Chore/mdbook updates (#237)</li>
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<li><strong>2025-12-18</strong> — <a href="https://github.com/vacp2p/rfc-index/blob/d03e699084774ebecef9c6d4662498907c5e2080/docs/status/deprecated/whisper-mailserver.md"><code>d03e699</code></a> — ci: add mdBook configuration (#233)</li>
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<li><strong>2025-04-29</strong> — <a href="https://github.com/vacp2p/rfc-index/blob/614348a4982aa9e519ccff8b8fbcd4c554683288/status/deprecated/whisper-mailserver.md"><code>614348a</code></a> — Status deprecated update2 (#134)</li>
|
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</ul>
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<!-- timeline:end -->
|
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<h2 id="abstract"><a class="header" href="#abstract">Abstract</a></h2>
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<p>Being mostly offline is an intrinsic property of mobile clients.
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They need to save network transfer and battery consumption
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to avoid spending too much money or constant charging.
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Whisper protocol, on the other hand, is an online protocol.
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Messages are available in the Whisper network only for short period of time calculate in seconds.</p>
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<p>Whisper <code>Mailserver</code> is a Whisper extension that allows to store messages permanently
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and deliver them to the clients even though they are already not available in the network and expired.</p>
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<h2 id="mailserver"><a class="header" href="#mailserver"><code>Mailserver</code></a></h2>
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<p>From the network perspective, <code>Mailserver</code> is just like any other Whisper node.
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The only difference is that it has a capability of archiving messages and delivering them to its peers on-demand.</p>
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<p>It is important to notice that <code>Mailserver</code> will only handle requests from its direct peers
|
|
and exchanged packets between <code>Mailserver</code> and a peer are p2p messages.</p>
|
|
<h3 id="archiving-messages"><a class="header" href="#archiving-messages">Archiving messages</a></h3>
|
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<p>A node which wants to provide <code>Mailserver</code> functionality MUST store envelopes
|
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from incoming message packets (Whisper packet-code <code>0x01</code>).
|
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The envelopes can be stored in any format,
|
|
however they MUST be serialized and deserialized to the Whisper envelope format.</p>
|
|
<p>A <code>Mailserver</code> SHOULD store envelopes for all topics to be generally useful for any peer,
|
|
however for specific use cases it MAY store envelopes for a subset of topics.</p>
|
|
<h3 id="requesting-messages"><a class="header" href="#requesting-messages">Requesting messages</a></h3>
|
|
<p>In order to request historic messages, a node MUST send a packet P2P Request (<code>0x7e</code>) to a peer providing <code>Mailserver</code> functionality.
|
|
This packet requires one argument which MUST be a Whisper envelope.</p>
|
|
<p>In the Whisper envelope's payload section, there MUST be RLP-encoded information about the details of the request:</p>
|
|
<pre><code class="language-golang">[ Lower, Upper, Bloom, Limit, Cursor ]
|
|
</code></pre>
|
|
<p><code>Lower</code>: 4-byte wide unsigned integer (UNIX time in seconds; oldest requested envelope's creation time)<br />
|
|
<code>Upper</code>: 4-byte wide unsigned integer (UNIX time in seconds; newest requested envelope's creation time)<br />
|
|
<code>Bloom</code>: 64-byte wide array of Whisper topics encoded in a bloom filter to filter envelopes<br />
|
|
<code>Limit</code>: 4-byte wide unsigned integer limiting the number of returned envelopes<br />
|
|
<code>Cursor</code>: an array of a cursor returned from the previous request (optional)</p>
|
|
<p>The <code>Cursor</code> field SHOULD be filled in
|
|
if a number of envelopes between <code>Lower</code> and <code>Upper</code> is greater than <code>Limit</code>
|
|
so that the requester can send another request using the obtained <code>Cursor</code> value.
|
|
What exactly is in the <code>Cursor</code> is up to the implementation.
|
|
The requester SHOULD NOT use a <code>Cursor</code> obtained from one <code>Mailserver</code> in a request to another <code>Mailserver</code>
|
|
because the format or the result MAY be different.</p>
|
|
<p>The envelope MUST be encrypted with a symmetric key agreed between the requester and <code>Mailserver</code>.</p>
|
|
<h3 id="receiving-historic-messages"><a class="header" href="#receiving-historic-messages">Receiving historic messages</a></h3>
|
|
<p>Historic messages MUST be sent to a peer as a packet with a P2P Message code (<code>0x7f</code>)
|
|
followed by an array of Whisper envelopes.
|
|
It is incompatible with the original Whisper spec (EIP-627) because it allows only a single envelope,
|
|
however, an array of envelopes is much more performant.
|
|
In order to stay compatible with EIP-627, a peer receiving historic message MUST handle both cases.</p>
|
|
<p>In order to receive historic messages from a <code>Mailserver</code>, a node MUST trust the selected <code>Mailserver</code>,
|
|
that is allowed to send packets with the P2P Message code. By default, the node discards such packets.</p>
|
|
<p>Received envelopes MUST be passed through the Whisper envelope pipelines
|
|
so that they are picked up by registered filters and passed to subscribers.</p>
|
|
<p>For a requester, to know that all messages have been sent by <code>Mailserver</code>,
|
|
it SHOULD handle P2P Request Complete code (<code>0x7d</code>). This code is followed by the following parameters:</p>
|
|
<pre><code class="language-golang">[ RequestID, LastEnvelopeHash, Cursor ]
|
|
</code></pre>
|
|
<p><code>RequestID</code>: 32-byte wide array with a Keccak-256 hash of the envelope containing the original request<br />
|
|
<code>LastEnvelopeHash</code>: 32-byte wide array with a Keccak-256 hash of the last sent envelope for the request<br />
|
|
<code>Cursor</code>: an array of a cursor returned from the previous request (optional)</p>
|
|
<p>If <code>Cursor</code> is not empty, it means that not all messages were sent due to the set <code>Limit</code> in the request.
|
|
One or more consecutive requests MAY be sent with <code>Cursor</code> field filled in order to receive the rest of the messages.</p>
|
|
<h2 id="security-considerations"><a class="header" href="#security-considerations">Security considerations</a></h2>
|
|
<h3 id="confidentiality"><a class="header" href="#confidentiality">Confidentiality</a></h3>
|
|
<p>The node encrypts all Whisper envelopes. A <code>Mailserver</code> node can not inspect their contents.</p>
|
|
<h3 id="altruistic-and-centralized-operator-risk"><a class="header" href="#altruistic-and-centralized-operator-risk">Altruistic and centralized operator risk</a></h3>
|
|
<p>In order to be useful, a <code>Mailserver</code> SHOULD be online most of the time. That means
|
|
users either have to be a bit tech-savvy to run their own node, or rely on someone
|
|
else to run it for them.</p>
|
|
<p>Currently, one of Status's legal entities provides <code>Mailservers</code> in an altruistic manner, but this is
|
|
suboptimal from a decentralization, continuance and risk point of view. Coming
|
|
up with a better system for this is ongoing research.</p>
|
|
<p>A Status client SHOULD allow the <code>Mailserver</code> selection to be customizable.</p>
|
|
<h3 id="privacy-concerns"><a class="header" href="#privacy-concerns">Privacy concerns</a></h3>
|
|
<p>In order to use a <code>Mailserver</code>, a given node needs to connect to it directly,
|
|
i.e. add the <code>Mailserver</code> as its peer and mark it as trusted.
|
|
This means that the <code>Mailserver</code> is able to send direct p2p messages to the node instead of broadcasting them.
|
|
Effectively, it will have access to the bloom filter of topics
|
|
that the user is interested in,
|
|
when it is online as well as many metadata like IP address.</p>
|
|
<h3 id="denial-of-service"><a class="header" href="#denial-of-service">Denial-of-service</a></h3>
|
|
<p>Since a <code>Mailserver</code> is delivering expired envelopes and has a direct TCP connection with the recipient,
|
|
the recipient is vulnerable to DoS attacks from a malicious <code>Mailserver</code> node.</p>
|
|
<h2 id="changelog"><a class="header" href="#changelog">Changelog</a></h2>
|
|
<h3 id="version-03"><a class="header" href="#version-03">Version 0.3</a></h3>
|
|
<p>Released <a href="https://github.com/status-im/specs/commit/664dd1c9df6ad409e4c007fefc8c8945b8d324e8">May 22, 2020</a></p>
|
|
<ul>
|
|
<li>Change to keep <code>Mailserver</code> term consistent</li>
|
|
</ul>
|
|
<h2 id="copyright"><a class="header" href="#copyright">Copyright</a></h2>
|
|
<p>Copyright and related rights waived via <a href="https://creativecommons.org/publicdomain/zero/1.0/">CC0</a>.</p>
|
|
<h2 id="references"><a class="header" href="#references">References</a></h2>
|
|
<ul>
|
|
<li><a href="https://eips.ethereum.org/EIPS/eip-627">Whisper</a></li>
|
|
<li><a href="https://github.com/ethereum/EIPs/blob/master/EIPS/eip-627.md">EIP-627</a></li>
|
|
<li><a href="/status/deprecated/secure-transport.html">SECURE-TRANSPORT</a></li>
|
|
<li><a href="https://github.com/ethereum/go-ethereum/wiki/Whisper-v6-RPC-API#shh_generatesymkeyfrompassword"><code>shh_generateSymKeyFromPassword</code></a></li>
|
|
<li><a href="https://eips.ethereum.org/EIPS/eip-627">Whisper v6</a></li>
|
|
<li><a href="/waku/deprecated/5/waku0.html">Waku V0</a></li>
|
|
<li><a href="/waku/standards/legacy/6/waku1.html">Waku V1</a></li>
|
|
<li><a href="https://github.com/status-im/specs/commit/664dd1c9df6ad409e4c007fefc8c8945b8d324e8">May 22, 2020 change commit</a></li>
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</ul>
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