Author of the original paper this write-up was based on here. The sybil attack as a theoretical problem is defined in the "Red Balloons" paper ("information propagation without self-cloning") so that might be a good starting point.
The solution formally and mathematically achieves these properties:
- not profitable to add routing hops
- profitable to share with others
- not profitable to share with yourself (!!!)
If you have a single central entity somewhere that isn't a sybil attack. Nothing wrong with being concerned about network centralization, but you're much less likely to have it in sybil-proof systems as above given that nodes suddenly have commercial incentives to share data as opposed to hoarding it.
The solution formally and mathematically achieves these properties:
- not profitable to add routing hops - profitable to share with others - not profitable to share with yourself (!!!)
If you have a single central entity somewhere that isn't a sybil attack. Nothing wrong with being concerned about network centralization, but you're much less likely to have it in sybil-proof systems as above given that nodes suddenly have commercial incentives to share data as opposed to hoarding it.