Build apps that issue and verify blockchain-based certificates for academic credentials, professional certifications, workforce development, and civic records.
johndo@microsoft.com
“One can have, some claim, as many electronic personas as one has time and energy to create.”
– Judith S. Donath 12 »
Abstract – Large-scale peer-to-peer systems face
security threats from faulty or hostile remote
computing elements. To resist these threats, many
such systems employ redundancy. However, if a
single faulty entity can present multiple identities,
it can control a substantial fraction of the system,
thereby undermining this redundancy. One
approach to preventing these “Sybil attacks” is to
have a trusted agency certify identities. This
paper shows that, without a logically centralized
authority, Sybil attacks are always possible except
under extreme and unrealistic assumptions of
resource parity and coordination among entities.
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