README
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Shacham-Waters (Part of Ringsig)
Package shacham implements efficient Shacham-Waters ring signatures. This scheme was published by Shacham and Waters in "Efficient Ring Signatures without Random Oracles". It provides full-key disclosure anonymity and insider corruption unforgeability while also being provably secure in the standard model. In this implementation, it relies on three complexity assumptions: integer factorization, computational Diffie-Hellman in prime order cyclic subgroups of elliptic curves, and subgroup decision in composite elliptic curves.
Dependencies
This package makes use of the PBC Go wrapper. Installation of the PBC Go wrapper is non-trivial. For instructions, see https://godoc.org/github.com/Nik-U/pbc.
Documentation
For additional documentation, see https://godoc.org/github.com/Nik-U/ringsig/shacham.
Documentation
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Overview ¶
Package shacham implements efficient Shacham-Waters ring signatures. This scheme was published by Shacham and Waters in "Efficient Ring Signatures without Random Oracles". It provides full-key disclosure anonymity and insider corruption unforgeability while also being provably secure in the standard model. In this implementation, it relies on three complexity assumptions: integer factorization, computational Diffie-Hellman in prime order cyclic subgroups of elliptic curves, and subgroup decision in composite elliptic curves.
Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func New ¶
New creates a new Shacham-Waters ring signature scheme. Rings can be arbitrarily large. The scheme is secure in the standard model, with reasonable performance.
Several levels of security are provided, based on the securityFactor parameter. Valid values are 1 to 3, inclusive, with 1 being the least secure, and 3 being the most secure. Level 1 is roughly equivalent to 80 bits of security, which is now widely considered to be weak. Levels 2 and 3 are roughly equivalent to 160 and 240 bits of security, respectively.
Types ¶
This section is empty.
Source Files