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Fabrice Mouhartem
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chap-GS-LWE.tex
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In this Chapter, we present the first dynamic group signature scheme that relies on lattice assumptions.
In this chapter, we present the first dynamic group signature scheme that relies on lattice assumptions.
This construction relies on a signature scheme with efficient protocols as in~\cref{ch:sigmasig}, and it is used in a similar fashion.
As a consequence, it is possible to construct lattice-based anonymous credential from this building block.
The group signature scheme relies on the Gentry, Peikert and Vaikuntanathan identity-based encryption~\cite{GPV08} with the Canetti, Halevi and Katz~\cite{CHK04} in order to obtain a CCA2-secure public key encryption scheme which will be used to provide full-anonymity.