Progress in Cryptology - AFRICACRYPT 2017

Name: Progress in Cryptology - AFRICACRYPT 2017 | 9th International Conference on Cryptology in Africa, Dakar, Senegal, May 24-26, 2017, Proceedings
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9th International Conference on Cryptology in Africa, Dakar, Senegal, May 24-26, 2017, Proceedings

Marc Joye Abderrahmane Nitaj(Editor)

Springer (Publisher)

Published on 10. May 2017

X, 231 pages

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978-3-319-57339-7 (ISBN)

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Content

Intro
Preface
Organization AFRICACRYPT 2017
Contents
Cryptographic Schemes
RingRainbow -- An Efficient Multivariate Ring Signature Scheme
1 Introduction
2 Ring Signatures
3 Multivariate Cryptography
3.1 The Rainbow Signature Scheme
3.2 Multivariate Ring Signature Schemes
4 Our Ring Signature Scheme
4.1 Security
5 Parameters
6 Alternative Construction of a Multivariate Ring Signature Scheme
6.1 Unforgeability
7 Reduction of Public Key Size
8 Implementation and Efficiency Results
9 Discussion
10 Conclusion
References
Pinocchio-Based Adaptive zk-SNARKs and Secure/Correct Adaptive Function Evaluation
1 Introduction
2 Preliminaries
2.1 Algebraic Tools, Notation, and Complexity Assumptions
2.2 Adaptive zk-SNARKs in the CRS Model
2.3 The Pinocchio zk-SNARK Construction from
3 Adaptive zk-SNARKs Based on Pinocchio
4 Smaller Proofs and Comparison to Literature
5 Secure/Correct Adaptive Function Evaluation
5.1 Our Construction
5.2 Efficient Instantiation Using Secret Sharing and Our zk-SNARK
6 Prototype and Distributed Medical Research Case
6.1 Prototype of Our zk-SNARK and Adaptive Trinocchio
6.2 Application to Medical Survival Analysis
7 Conclusion
References
Revisiting and Extending the AONT-RS Scheme: A Robust Computationally Secure Secret Sharing Scheme
1 Introduction
2 Preliminaries
2.1 Secret Sharing Schemes
2.2 Symmetric Key Encryption
2.3 Commitment Schemes
2.4 Error Correcting Codes
2.5 Information Dispersal Algorithms
3 The AONT-RS
3.1 Generalising the AONT-RS
3.2 Information Leakage
3.3 Proving the Privacy of AONT-RS
4 Extending AONT-RS to be Robust
4.1 Proof of Privacy
4.2 Proof of Robustness
5 Comparing RAONT-RS and HK2
5.1 The SSMS and HK2 Scheme
5.2 Comparison
6 Conclusion
References
Side-Channel Analysis
Climbing Down the Hierarchy: Hierarchical Classification for Machine Learning Side-Channel Attacks
1 Introduction
1.1 Idea and Contributions
1.2 Road Map
2 Machine Learning Techniques
2.1 Naive Bayes
2.2 Decision Tree - C4.5
2.3 Rotation Forest
2.4 Support Vector Machines
3 The Hierarchical Approach Under Test
3.1 Experimental Data
3.2 Training Phase and Parameter Tuning
3.3 Testing Results
4 Realistic Testing
4.1 Hierarchical Attack
4.2 Structured Attack
4.3 Attack Results and Comparison with Template Attack
5 Discussion
6 Conclusions
References
Multivariate Analysis Exploiting Static Power on Nanoscale CMOS Circuits for Cryptographic Applications
1 Introduction
2 Background
3 Case Study
3.1 4-Bit PRESENT Crypto-Core
3.2 Full Implementation of PRESENT-80 Block Cipher
3.3 Testbench
4 Univariate Analysis of Information Leakage
4.1 4-Bit PRESENT Crypto-Core
4.2 Full Implementation of PRESENT-80 Block Cipher
5 Multivariate Analysis: Can We Exploit More?
6 Conclusion
References
Differential Bias Attack for Block Cipher Under Randomized Leakage with Key Enumeration
1 Introduction
1.1 Background
1.2 Contribution
2 Previous Works
2.1 Leakage Model for Side-Channel Attacks
2.2 Differential Bias Attack [2]
2.3 Key Enumeration and Rank Estimation
3 Reestimation of Complexity by Time-Data Tradeoff
3.1 New Hypothesis-Testing Method
3.2 Comparison to the Previous Method
4 Application of Key Enumeration and Rank Estimation
4.1 Differential Bias Attack with Key Enumeration
4.2 Experimental Evaluation
5 Conclusion
References
Differential Cryptanalysis
Impossible Differential Cryptanalysis of Reduced-Round SKINNY
1 Introduction
2 Specifications of SKINNY
3 An Impossible Differential Distinguisher of SKINNY
4 Impossible Differential Key-Recovery Attack on 20-Round SKINNY-n-2n (n=64 or 128)
4.1 Impossible Differential Key-Recovery Attack on SKINNY-64-128
4.2 Impossible Differential Key-Recovery Attack on SKINNY-128-256
5 Impossible Differential Key-Recovery Attack on 18-Round SKINNY-n-n (n=64 or 128)
6 Impossible Differential Key-Recovery Attack on 22-Round SKINNY-n-3n (n=64 or 128)
7 Conclusion
References
Impossible Differential Attack on Reduced Round SPARX-64/128
1 Introduction
2 Description of SPARX-64/128
2.1 Specifications of SPARX-64/128
3 Impossible Differentials of SPARX-64/128
4 Impossible Differential Cryptanalysis of SPARX-64/128
4.1 15-Round Impossible Differential Attack on SPARX-64/128
4.2 16-Round Impossible Differential Attack on SPARX-64/128
5 Conclusion
References
Applications
Private Conjunctive Query over Encrypted Data
1 Introduction
1.1 Review of Recent Works
1.2 Our Contribution
2 Security Tool
2.1 Asymmetric SwHE Scheme
2.2 Security of SwHE Scheme
2.3 Correctness of SwHE Scheme
3 Private Conjunctive Query Protocol
3.1 Boosting Performance Using the Batch Technique
3.2 Batch Private Conjunctive Query Protocol
3.3 Data Representation for Conjunctive Query Processing
3.4 Packing Method of Data
4 Secure Computation of Private Conjunctive Query
4.1 Batch Private Conjunctive Query Protocol
4.2 Solving Additional Information Leakage Problem
5 Performance Analysis
5.1 Theoretical Evaluation
5.2 Experimental Settings
5.3 Experimental Evaluation
6 Conclusions
References
Efficient Oblivious Transfer from Lossy Threshold Homomorphic Encryption
1 Introduction
2 Background
3 Definition of Two-Party Lossy Threshold PKE Scheme
4 A New Two-Party Lossy Threshold Homomorphic Encryption Scheme
5 Security of the DKG Protocol DKG
6 Security of Encryption Scheme ELTA2E
7 Oblivious Transfer Against One-Sided Active Adaptive Adversaries
8 Security of Protocol OTAA
9 Efficiency and Comparison with Related Work
10 Efficiency of the OT Protocol by Hazay and Patra
11 Adaptive Zero Knowledge Arguments
12 Future Work
References
Privacy-Friendly Forecasting for the Smart Grid Using Homomorphic Encryption and the Group Method of Data Handling
1 Introduction
2 The Smart Grid and Privacy Concerns
3 Neural Networks versus the Group Method of Data Handling
4 The Fan-Vercauteren SHE Scheme
5 Representing Fixed-Point Numbers in Plaintext Space
6 Prediction Approach for the Smart Grid
6.1 Prediction Model: Apartment Complexes
6.2 Design of the Network
6.3 Benchmark Results
7 Conclusions and Future Work
References
Number Theory
On Indifferentiable Hashing into the Jacobian of Hyperelliptic Curves of Genus 2
1 Introduction
2 Preliminaries
3 Almost-Injective and Invertible Encodings into Three Families of Hyperellitic Curves
3.1 An Almost-Injective Encoding on H1
3.2 An Almost-Injective Encoding on H2
3.3 An Almost-Injective Encoding on H3
4 Applications to the Jacobian
4.1 General Framework on Indifferentiable Hashing into the Jacobian
4.2 Indifferentiable Hashing into the Jacobian of Hi, 1i3
5 Conclusion
References
Cryptanalysis of Some Protocols Using Matrices over Group Rings
1 Introduction
2 Irreducible Representations of S5
3 Cryptanalysis of Protocols
4 An Example
5 Conclusion
References
Author Index

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Progress in Cryptology - AFRICACRYPT 2017

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