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Efficient Transparent Redactable Signatures with a Single Signature Invocation
transparent redactable signatures digital signatures combinatorial cryptography
2016/12/29
A redactable signature scheme is one that allows the original signature to be used, usually
along with some additional data, to verify certain carefully specified changes to the original document
th...
Cryptanalysis of a certificateless aggregate signature scheme
public-key cryptography C4I
2016/12/26
Recently, Nie et al. proposed a certificateless aggregate signature scheme. In the standard security model considered in certificateless cryptography, we are dealing with two types of adversaries. In ...
A Novel Multi-factor ID-based Designated Verifier Signature scheme
cryptographic protocols digital signatures
2016/12/24
In a classic digital signature scheme, the global community is capable of verifying a signature. In a designated verifier scheme (DVS), only the designated verifier has this capability. In a classic D...
Signature Schemes Based On Supersingular Isogeny Problems
Supersingular Isogeny Problems public-key cryptography
2016/12/24
We present the first signature schemes whose security relies on computational assumptions relating to isogeny graphs of supersingular elliptic curves. We give two schemes. The first one is obtained fr...
On the security of new vinegar-like variant of multivariate signature scheme
multivariate public-key cryptosystems new vinegar-like variant
2016/12/10
In IMACC 2015 and Inscrypt 2015, Zhang and Tan proposed new vinegar-like variants of multivariate signature schemes. While their aims were to enhance the security of broken schemes, the security is mu...
Revisiting the Cubic UOV Signature Scheme
Post-Quantum Cryptography Multivariate Cryptography Signature Schemes
2016/12/7
As recently been emphasized by NSA and NIST, there is an increasing need for cryptographic schemes being secure against quantum computer attacks. Especially in the area of digital signature schemes, m...
Improved Parameters for the Ring-TESLA Digital Signature Scheme
Cryptography Post-Quantum Cryptography Lattice
2016/12/7
Akleylek et al. have proposed Ring-TESLA, a practical and efficient digital signature
scheme based on the Ring Learning With Errors problem. However we have identified there
are some problems with t...
This work is the extended version of [1] which proposed the first code-based group sig- nature. The new group signature scheme we present here has numerous advantages over all existing post-quantum co...
Cryptanalysis and improvement of certificateless aggregate signature with conditional privacy-preserving for vehicular sensor networks
conditional privacy-preserving vehicular sensor networks
2016/7/15
Secure aggregate signature schemes have attracted more concern due to their wide application in resource constrained environment. Recently, Horng et al. [S. J. Horng et al., An efficient certificatele...
Security Analysis of ePrint Report 2016/500 "Efficient Identity-Based Encryption and Public-Key Signature from Trapdoor Subgroups"
attack trapdoor subgroup congruential equations
2016/5/30
In this short report we analyse the security of three schemes proposed by J. H. Park et al. in "Efficient Identity-Based Encryption and Public-Key Signature from Trapdoor Subgroups". The schemes make ...
Efficient Identity-Based Encryption and Public-Key Signature from Trapdoor Subgroups
identity-based encryption trapdoor subgroup RSA modulus
2016/5/24
We present a new Identity-Based Encryption (IBE) scheme from a trapdoor subgroup of Z∗n for an RSA modulus n. In a trapdoor subgroup of Z∗n, a subgroup order is hidden and can be used as a...
MQSAS - A Multivariate Sequential Aggregate Signature Scheme
Multivariate Cryptography HFEv- Sequential Aggregate Signatures
2016/5/24
(Sequential) Aggregate signature schemes enable a group of users u1,…,uk with messages m1,…,mk to produce a single signature Σ which states the integrity and authenticity of all the messages m1,…,mk. ...
Towards Tightly Secure Short Signature and IBE
Tight security pseudorandom functions short signatures
2016/5/23
Constructing short signatures with tight security from standard assumptions is a long-standing open problem. We present an adaptively secure, short (and stateless) signature scheme, featuring a consta...
Shortening the Libert-Peters-Yung Revocable Group Signature Scheme by Using the Random Oracle Methodology
group signature revocation scalability
2016/5/20
In EUROCRYPT 2012, Libert, Peters and Yung (LPY) proposed the first scalable revocable group signature (R-GS) scheme in the standard model which achieves constant signing/verification costs and other ...
NTRU Modular Lattice Signature Scheme on CUDA GPUs
NTRU digital signatures lattice techniques
2016/5/18
In this work we show how to use Graphics Processing Units (GPUs) with Compute Unified Device Architecture (CUDA) to accelerate a lattice based signature scheme, namely, the NTRU modular lattice signat...