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Separating Standard and Asymmetric Password-Authenticated Key Exchange
PAKE Password-Authenticated Key Exchange
2019/9/23
Password-Authenticated Key Exchange (PAKE) is a method to establish cryptographic keys between two users sharing a low-entropy password. In its asymmetric version, one of the users acts as a server an...
Modifying The Tropical Version of Stickel’s Key Exchange Protocol
Stickel’s protocol Tropical Algebra Cryptography
2019/8/2
A tropical version of Stickel’s key exchange protocol was suggested by Grigoriev and Sphilrain [2] and successfully attacked by Kotov and Ushakov [5]. We suggest some modifications of this scheme that...
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...
Highly Efficient Key Exchange Protocols with Optimal Tightness -- Enabling real-world deployments with theoretically sound parameters
AKE provable security tightness
2019/6/24
In this paper we give nearly-tight reductions for modern implicitly authenticated Diffie-Hellman protocols in the style of the Signal and Noise protocols which are extremely simple and efficient. Unli...
A Framework for Universally Composable Oblivious Transfer from One-Round Key-Exchange
Oblivious transfer universal composability key exchange
2019/6/21
Oblivious transfer is one of the main pillars of modern cryptography and plays a major role as a building block for other more complex cryptographic primitives. In this work, we present an efficient a...
Key Exchange and Authenticated Key Exchange with Reusable Keys Based on RLWE Assumption
Authenticated Key Exchange RLWE key reuse
2019/6/10
Key Exchange (KE) is, undoubtedly, one of the most used cryptographic primitives in practice. Its authenticated version, Authenticated Key Exchange (AKE), avoids man-in-the-middle-based attacks by pro...
Symmetric-key Authenticated Key Exchange (SAKE) with Perfect Forward Secrecy
Authenticated key agreement Symmetric-key cryptography Perfect forward secrecy
2019/5/9
Key exchange protocols in the asymmetric-key setting are known to provide stronger security properties than protocols in symmetric-key cryptography. In particular, they can provide perfect forward sec...
HMAKE: Legacy-Compliant Multi-factor Authenticated Key Exchange from Historical Data
Historical Data Authentication Authenticated Key Exchange
2019/5/9
In this paper, we introduce two lightweight historical data based multi-factor authenticated key exchange (HMAKE) protocols in the random oracle model. Our HMAKE protocols use a symmetric secret key, ...
Constant-Round Group Key Exchange from the Ring-LWE Assumption
Group key exchange Ring learning with errors Post-quantum cryptography
2019/4/22
Group key-exchange protocols allow a set of N parties to agree on a shared, secret key by communicating over a public network. A number of solutions to this problem have been proposed over the years, ...
Identity-Concealed Authenticated Encryption and Key Exchange
key exchange identity privacy TLS
2018/12/3
Identity concealment and zero-round trip time (0-RTT) connection are two of current research focuses in the design and analysis of secure transport protocols, like TLS1.3 and Google's QUIC, in the cli...
A Public Key Exchange Cryptosystem Based on Ideal Secrecy
one way function ideal secrecy asymmetric key cryptography
2018/11/29
This paper proposes two closely related asymmetric key (or a public key) schemes for key exchange whose security is based on the notion of ideal secrecy. In the first scheme, the private key consists ...
The security of today's widely used communication security protocols is based on trust in Certificate Authorities (CAs). However, the real security of this approach is debatable, since certificate han...
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...
Generic Authenticated Key Exchange in the Quantum Random Oracle Model
Authenticated key exchange quantum random oracle model NIST
2018/11/8
We propose FO-AKE , a generic construction of two-message authenticated key exchange (AKE) from any passively secure public key encryption (PKE) in the quantum random oracle model (QROM). Whereas prev...
18 Seconds to Key Exchange: Limitations of Supersingular Isogeny Diffie-Hellman on Embedded Devices
Post-quantum cryptography supersingular isogeny SIDH
2018/11/8
The quantum secure supersingular isogeny Diffie-Hellman (SIDH) key exchange is a promising candidate in NIST's on-going post-quantum standardization process. The evaluation of various implementation c...