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Revisiting the Hybrid attack on sparse and ternary secret LWE
Lattice-based Cryptography Learning with Errors Homomorphic Encryption
2019/9/16
In the practical use of the Learning With Error (LWE) based cryptosystems, it is quite common to choose the secret to be extremely small: one popular choice is ternary (±1,0±1,0) coefficient vector, a...
Prototyping post-quantum and hybrid key exchange and authentication in TLS and SSH
post-quantum cryptography TLS SSH
2019/7/25
Once algorithms for quantum-resistant key exchange and digital signature schemes are selected by standards bodies, adoption of post-quantum cryptography will depend on progress in integrating those al...
Towards a Hybrid Public Key Infrastructure (PKI): A Review
Certificate-based PKI Identity-based public key cryptography (ID-PKC) Hybrid PKI
2019/7/15
Traditional Certificate-based public key infrastructure (PKI) suffers from the problem of certificate overhead like its storage, verification, revocation etc. To overcome these problems, the idea of c...
Modern Family: A Revocable Hybrid Encryption Scheme Based on Attribute-Based Encryption, Symmetric Searchable Encryption and SGX
Cloud Security Storage Protection Access Control, Policies
2019/6/12
Secure cloud storage is considered as one of the most important issues that both businesses and end-users take into account before moving their private data to the cloud. Lately, we have seen some int...
A note on isogeny-based hybrid verifiable delay functions
verifiable delay function time-lock puzzle isogeny-based cryptography
2019/3/1
Using the idea behind the recently proposed isogeny- and paring-based verifiable delay function (VDF) by De Feo, Masson, Petit and Sanso, we construct an isogeny-based VDF without the use of pairings....
New Hybrid Method for Isogeny-based Cryptosystems using Edwards Curves
Isogeny Post-quantum cryptography Montgomery curves
2018/12/24
Along with the resistance against quantum computers, isogeny-based cryptography offers attractive cryptosystems due to small key sizes and compatibility with the current elliptic curve primitives. Whi...
Hybrid Key Encapsulation Mechanisms and Authenticated Key Exchange
hybrid key exchange key exchange hybrids
2018/11/9
Concerns about the impact of quantum computers on currently deployed public key cryptography have instigated research into not only quantum-resistant cryptographic primitives but also how to transitio...
Examining Complex Forms of Conflict: Gray Zone and Hybrid Challenges
Conflict Gray Zone Hybrid Challenges Defining Hybrid Warfare
2019/10/11
The Joint Force, and the national security community as a whole, must be ready and able to respond to numerous challenges across the full spectrum of conflict including complex operations during peace...
In addition to the obvious theoretical appeal of the question towards better understanding secure computation, perfect, as opposed to statistical reductions may be useful for designing MPC protocols w...
Secure Cloud Storage Scheme Based On Hybrid Cryptosystem
Cloud storage ECC based public key cryptography hybrid cryptosystem
2018/3/26
This paper presents a secure cloud storage scheme based on hybrid cryptosystem, which consists of Elliptic Curve Cryptography (ECC), Advanced Encryption Standard (AES), and one-way hash function. Here...
On hybrid SIDH schemes using Edwards and Montgomery curve arithmetic
SIDH public-key cryptography
2017/12/19
Supersingular isogeny Diffie-Hellman (SIDH) is a proposal for a quantum-resistant key exchange. The state-of-the-art implementation works entirely with Montgomery curves and basically can be divided i...
Chameleon: A Hybrid Secure Computation Framework for Machine Learning Applications
SFE CCS'17
2017/12/1
We present Chameleon, a novel hybrid (mixed-protocol) framework for secure function evaluation (SFE) which enables two parties to jointly compute a function without disclosing their private inputs. Ch...
On the Complexity of the Hybrid Approach on HFEv-
Multivariate Cryptography HFEv- Direct Attack
2017/11/28
The HFEv- signature scheme is one of the most promising candidates for post-quantum digital signatures. Most notably here is the short signature size of the scheme. It has long been known that direct ...
Hybrid Encryption in a Multi-User Setting, Revisited
hybrid encryption multi-user security tightness
2017/9/7
This paper contributes to understanding the interplay of security notions for PKE, KEMs, and DEMs, in settings with multiple users, challenges, and instances. We start analytically by first studying (...
Efficient Hybrid Proxy Re-Encryption for Practical Revocation and Key Rotation
Proxy Re-encryption Ciphertext Delegation Hybrid Encryption
2017/9/1
We consider the problems of i) using public-key encryption to enforce dynamic access control on clouds; and ii) key rotation of data stored on clouds. Historically, proxy re-encryption, ciphertext del...