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Foundations of Group Signatures: The Case of Dynamic Groups [chapter]

Mihir Bellare, Haixia Shi, Chong Zhang
2005 Lecture Notes in Computer Science  
Recently, a first step toward establishing foundations for group signatures was taken [5] , with a treatment of the case where the group is static.  ...  This paper treats this case, providing foundations for dynamic group signatures, in the form of a model, strong formal definitions of security, and a construction proven secure under general assumptions  ...  However, an extension of the existing treatment of static groups [5] to the dynamic case does not seem to be immediate.  ... 
doi:10.1007/978-3-540-30574-3_11 fatcat:huvauydd3zf5diyjovuz7lzru4

Foundations of Fully Dynamic Group Signatures

Jonathan Bootle, Andrea Cerulli, Pyrros Chaidos, Essam Ghadafi, Jens Groth
2020 Journal of Cryptology  
We consider both the case where the group management and tracing signatures are administered by the same authority, i.e., a single group manager, and also the case where those roles are administered by  ...  Group signatures allow members of a group to anonymously sign on behalf of the group. Membership is administered by a designated group manager.  ...  The rest of the oracles are defined exactly as in the case of fully dynamic group signatures and simplified by excluding the group information info = ε and epochs τ = 0. [14] . Bellare et al.  ... 
doi:10.1007/s00145-020-09357-w fatcat:cbboijkhafbifhlsbks2lkf4qu

Foundations of Fully Dynamic Group Signatures [chapter]

Jonathan Bootle, Andrea Cerulli, Pyrros Chaidos, Essam Ghadafi, Jens Groth
2016 Lecture Notes in Computer Science  
In this work we take a close look at existing security definitions for fully dynamic group signatures.  ...  Group signatures are a central cryptographic primitive that has received a considerable amount of attention from the cryptographic community.  ...  Fully dynamic group signatures also imply the partially dynamic group signatures of [?] in the case where nobody is removed from the group.  ... 
doi:10.1007/978-3-319-39555-5_7 fatcat:ksooufnb3vesnhhj4xyh6lchuu

Foundations of Group Signatures: Formal Definitions, Simplified Requirements, and a Construction Based on General Assumptions [chapter]

Mihir Bellare, Daniele Micciancio, Bogdan Warinschi
2003 Lecture Notes in Computer Science  
This paper provides theoretical foundations for the group signature primitive. We introduce strong, formal definitions for the core requirements of anonymity and traceability.  ...  Finally we prove the existence of a construct meeting our definitions based only on the sole assumption that trapdoor permutations exist. 2 Definitions of the security of group signature schemes Notation  ...  The second and third authors are supported in part by NSF CAREER Award CCR-0093029.  ... 
doi:10.1007/3-540-39200-9_38 fatcat:7gpvjwoonfgolomifd55eja6qi

Isometry groups and geodesic foliations of Lorentz manifolds. Part I: Foundations of Lorentz dynamics [article]

Abdelghani Zeghib
1997 arXiv   pre-print
In the Part II of the series, a partial classification of compact Lorentz manifolds with non-compact isometry group will be achieved with the aid of geometrical tools along with the dynamical ones presented  ...  In the present part we investigate the dynamics of affine, and especially Lorentz transformations. In particular we show how this is related to geodesic foliations.  ...  However, we do not know enough things about this structure, in the case of the remaining groups, such as, for example, the case of abelian groups.  ... 
arXiv:dg-ga/9711015v1 fatcat:rf7orvfznbdpfcolvr36lx7en4

Group-theoretical foundations of classical mechanics: The Lagrangian gauge problem

Jean-Marc Lévy-Leblond
1969 Communications in Mathematical Physics  
FINAL REMARKS The necessity of having a formalism for the general case (without a fibre bundle structure) becomes apparent, for instance, when studying the relativistic particle.  ...  in the classification of Lagrangians admitting a given group of Noetherian symmetries analogous to [26] , [27] , Secondly, one could try to generalize the main results of this paper to Lagrangians depending  ...  The case n -1 is associated with dynamical systems having finite numbers of degrees of freedom and M is then interpreted as the axis of the absolute time.  ... 
doi:10.1007/bf01646436 fatcat:forb673kwndxhjahjrnafgot3y

Functional Renormalization Group Flows on Friedman–Lemaître–Robertson–Walker backgrounds

Alessia Platania, Frank Saueressig
2018 Foundations of physics  
We reanalyze the construction of the gravitational functional renormalization group equation tailored to the Arnowitt-Deser-Misner formulation emphasizing its connection to the covariant formulation.  ...  to the Causal Dynamical Triangulations approach to quantum gravity.  ...  Acknowledgements We thank the organizers of the workshop Lemaître for hospitality and setting up this very stimulating event. Furthermore, we thank A. Bonanno, G. Gionti, W. Houthoff, A. Kurov, K.  ... 
doi:10.1007/s10701-018-0181-0 fatcat:6cpx7hqnfbekvlrob5kopolfei

Isometry Groups and Geodesic Foliations of Lorentz Manifolds. Part I: Foundations of Lorentz Dynamics

A. Zeghib
1999 Geometric and Functional Analysis  
In the Part II of the series, a partial classification of compact Lorentz manifolds with non-compact isometry group will be achieved with the aid of geometrical tools along with the dynamical ones presented  ...  In the present part we investigate the dynamics of affine, and especially Lorentz transformations. In particular we show how this is related to geodesic foliations.  ...  Vol. 9, 1999 FOUNDATIONS OF LORENTZ DYNAMICS 805 The bifoliation of an elementary group. Observe that an elementary group may preserve many bifoliations.  ... 
doi:10.1007/s000390050102 fatcat:k74cs7lmdzbrbebnp37nedjk7i

Dynamical masses of M-dwarf binaries in young moving groups. I. The case of TWA 22 and GJ 2060

Laetitia Rodet, M. Bonnefoy, S. Durkan, H. Beust, A.-M. Lagrange, J. E. Schlieder, M. Janson, A. Grandjean, G. Chauvin, S. Messina, A.-L. Maire, W. Brandner (+7 others)
2018 Astronomy and Astrophysics  
As their dynamical mass can be measured within a few years, they can be used to calibrate the evolutionary tracks and set new constraints on the age of young moving groups.  ...  The dynamical mass of GJ 2060 AB is inconsistent with the most recent models predictions (BCAH15, PARSEC) for an ABDor age in the range 50-150 Myr.  ...  It has also been carried out within the frame of the National Centre for Competence in Research PlanetS supported by the Swiss National Science Foundation (SNSF).  ... 
doi:10.1051/0004-6361/201832924 fatcat:7j2b2uydjrb73d27sjijqezgl4

Research following a foundation in the applied optics group at University of Kent

Alan D. Kersey
2011 Photonic Sensors  
This paper summarizes research activities at University of Kent over the period from September 1981 through November 1984.  ...  Subsequent researches undertaken in the US Naval Research Laboratory and two start-up companies are also described.  ...  A foundation built at Kent I started my new post-doctoral position with Prof. David Jackson in the autumn of 1981.  ... 
doi:10.1007/s13320-011-0031-6 fatcat:k4c2unkud5dgrnhvhzj3mb6pby

Optimal Control and Geodesics on Quadratic Matrix Lie Groups

Anthony M. Bloch, Peter E. Crouch, Jerrold E. Marsden, Amit K. Sanyal
2008 Foundations of Computational Mathematics  
A discretization of these flows is given which gives a numerical algorithm for computation of the flow dynamics.  ...  In this paper, we consider some matrix subgroups of the general linear group and in particular the special linear group that are defined by a quadratic matrix identity.  ...  Acknowledgements: Research supported in part by the National Science Foundation.  ... 
doi:10.1007/s10208-008-9025-1 fatcat:evxo3rmhljce5lo4ycfpxyjdzi

Automatically analyzing groups of crashes for finding correlations

Marco Castelluccio, Carlo Sansone, Luisa Verdoliva, Giovanni Poggi
2017 Proceedings of the 2017 11th Joint Meeting on Foundations of Software Engineering - ESEC/FSE 2017  
This means developers currently spend a fair amount of time analyzing the groups themselves, which in turn means that a) they are not spending their time actually developing a fix for the crash; and b)  ...  Many earlier works focused on improving the clustering of crashes but, to the best of our knowledge, the problem of automatically describing properties of a cluster of crashes is so far unexplored.  ...  This research was carried out within the Fault-Injection-Driven Approach project in the frame of Programme STAR, financially supported by University Federico II of Naples and Compagnia di San Paolo foundation  ... 
doi:10.1145/3106237.3106306 dblp:conf/sigsoft/CastelluccioSVP17 fatcat:d6npc2skqne5vodxmb2a77fudi

Spectroscopic signatures of crystal momentum fractionalization

Andrew M. Essin, Michael Hermele
2014 Physical Review B  
We show that such quantum number fractionalization has dramatic, spectroscopically accessible consequences, namely enhanced periodicity of the two-spinon density of states in the Brillouin zone, which  ...  This effect is a sharp signature of certain topologically ordered spin liquids and other symmetry enriched topological phases.  ...  The Institute for Quantum Information and Matter (IQIM) is an NSF Physics Frontiers Center with support from the Gordon and Betty Moore Foundation.  ... 
doi:10.1103/physrevb.90.121102 fatcat:vjtjzy7fojfulg74ws63mone6q

Signatures of Discrete Breathers in Coherent State Quantum [article]

Kirill Igumenshchev, Misha Ovchinnikov, Panagiotis Maniadis, Oleg Prezhdo
2011 arXiv   pre-print
Motivated by the conceptual bridging of the DBs phenomena in classical and quantum mechanical representation, we study their signatures in the dynamics of a quantum equivalent of a classical mechanical  ...  We show that in contrast to a point in a phase space that can exhibit either delocalized or localized motion, a coherent state can show signatures of a quantum equivalent of both localized and delocalized  ...  Acknowledgments The research was funded by the NSF grant CHE-1050405 and NSF CAREER Award No. 0645340.  ... 
arXiv:1111.5878v3 fatcat:mmpweepzynexdd6v5buxwpbssm

The Extended Relativity Theory in Born-Clifford Phase Spaces with a Lower and Upper Length Scales and Clifford Group Geometric Unification

Carlos Castro
2005 Foundations of physics  
(L P lanck /R) 2 ∼ 10 −122 M 4 P lanck , and can be obtained when the infrared scale R is set to be of the order of the present value of the Hubble radius.  ...  We proceed with an extensive review of Smith's 8D model based on the Clifford algebra Cl(1, 7) that reproduces at low energies the physics of the Standard Model and Gravity, including the derivation of  ...  To Frank ( Tony ) Smith for many discussions and crucial explanations of his work, to Matti Pitkanen and the referee for useful suggestions.  ... 
doi:10.1007/s10701-005-5829-x fatcat:cp3uscmr2bb5zkwovvuusa5eqm
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