The InterPlanetary File System (IPFS) is a protocol and peer-to-peer network for storing and sharing data in a distributed file system. IPFS uses content-addressing to uniquely identify each file in a global namespace connecting all computing devices.

Intro 0:00

Why IPFS? 2:00

Explain the original web model and the limitation

  • Content addressing instead of location addressing

  • decentralized content distributed among peers

Content 3:30

  • Content is hashed as CID

  • Content is immutable each update generates new CID

  • Content addressing

Routing 4:30

  • Distributed Hash Table (DHTs) maps CID / Peer IP address

  • DHT server hosts content and DHT

Publishing Content 6:30

  • New Content that you want to share on ipfs

  • hash the content creating new CID

  • Update your local DHT CID / your ip address

  • DHT will be updated to all the content peer (NOT the CONTENT)

  • People searching for your CID will be connected to you and only you.

Consuming Content 8:48

  • ipfs client (dht client) want to consume Ipfs://cid/

  • ipfs client consults its local DHT table to see where this CID is located, gets back a collection of IP addresses

  • client connects to some or all the peers found hosting that CID

  • client downloads chunks of the content from each peer so it speeds up

  • Once the client has the content it is now also updating its local DHT table that it now also hosts that CID (if it supports being a DHT server)

  • New updated DHT is propogated across peer

IPFS Overview (Digrams) 11:30

Demo 13:45

More Information 18:30

Immutable Content

  • if Content gets updated changes URI how do I inform the user?

  • hash the public key of the user instead and share that

Brand new Client/server

  • I know nothing about the network (Bootstraping)

  • you will be bootstrapped with a collection of ip addresses to start you up.

More

  • IPFS gateway

  • IP Name server

  • Solve content

  • Deleting Content( once other node hosts it no way to delete it from their network)

NAT traversal

Resources

https://datatracker.ietf.org/meeting/interim-2020-dinrg-01/materials/slides-interim-2020-dinrg-01-sessa-an-overview-of-the-interplanetary-file-system-ipfs.pdf

https://www.youtube.com/watch?v=K4Usud4g4iY&feature=youtu.be&t=1008

https://twitter.com/hnasr/status/1353548949945163776?s=21

https://docs.ipfs.io/conce

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