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28 lines
899 B
Markdown
28 lines
899 B
Markdown
# IFPS Handshake
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The IPFS Protocol Handshake is divided into three sequential steps
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1. Version Handshake (`Hanshake1`)
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2. Secure Channel (`NewSecureConn`)
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3. Services (`Handshake3`)
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Currently these parts currently happen sequentially (costing an awful 5 RTT),
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but can be optimized to 2 RTT.
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### Version Handshake
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The Version Handshake ensures that nodes speaking to each other can interoperate.
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They send each other protocol versions and ensure there is a match on the major
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version (semver).
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### Secure Channel
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The second part exchanges keys and establishes a secure comm channel. This
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follows ECDHE TLS, but *isn't* TLS. (why will be written up elsewhere).
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### Services
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The Services portion sends any additional information on nodes needed
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by the nodes, e.g. Listen Address (the received address could be a Dial addr),
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and later on can include Service listing (dht, exchange, ipns, etc).
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