Commit a338c42b5787ed52b50778d8ddc9604a7e97af83
Merge remote-tracking branch 'matthiasbeyer/security-of-p2p-websites'
Stephen Whitmore committed on 1/9/2018, 8:13:01 PMParent: 756734913c379760350969890a4c483fca9d1f06
Parent: ab39e58bd5cdc80a3c9556a45bc3278a58084f00
Files changed
| README.md | changed |
| README.md | |||
|---|---|---|---|
| @@ -59,8 +59,10 @@ | |||
| 59 | 59 … | content. | |
| 60 | 60 … | ||
| 61 | 61 … | ## 3. What about security? Somebody could share a hacked version of a p2p website? | |
| 62 | 62 … | ||
| 63 … | +*From @noffle:* | ||
| 64 … | + | ||
| 63 | 65 … | It depends what the security model of the system hosting the website uses. There | |
| 64 | 66 … | are two commonly tools I know of for ensuring that a copy of data you've | |
| 65 | 67 … | received from a potentially untrusted source is authentic: | |
| 66 | 68 … | ||
| @@ -81,8 +83,24 @@ | |||
| 81 | 83 … | content-addressed above. [Dat](https://dat-project.org), | |
| 82 | 84 … | [IPFS](https://ipfs.io) and [SSB](https://scuttlebutt.nz) all use this | |
| 83 | 85 … | approach for dynamic data. | |
| 84 | 86 … | ||
| 87 … | +*From @matthiasbeyer:* | ||
| 88 … | + | ||
| 89 … | +If cryptographic signatures come into play, this is not possible. | ||
| 90 … | + | ||
| 91 … | +Consider a content-addressed system. In such systems, content is addressed via | ||
| 92 … | +a cryptographic hash which represents the content. For example, a file | ||
| 93 … | +containing "Hello World" gets a hash "648a6a6ffff". | ||
| 94 … | +If a peer now tries to fetch content from the network, it does so by asking | ||
| 95 … | +for the content of "648a6a6ffff". | ||
| 96 … | +If it gets sent this content, it can then verify with that same hash, | ||
| 97 … | +whether the content it got is the actual content it requested. | ||
| 98 … | + | ||
| 99 … | +An attacker would be able to host malicious nodes in the network, but as the | ||
| 100 … | +node which _requests_ the content (your node) can verify that it got what it | ||
| 101 … | +expected. | ||
| 102 … | + | ||
| 85 | 103 … | ## 4. What about privacy? Everybody in the p2p network can see what I am looking at. | |
| 86 | 104 … | ||
| 87 | 105 … | *TODO* | |
| 88 | 106 … | ||
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