scholarly journals Post-Quantum Constant-Round Group Key Exchange from Static Assumptions

2020 ◽  
pp. 251-272
Author(s):  
Katsuyuki Takashima
Keyword(s):  
Key Exchange ◽  
Group Key ◽  
Group Key Exchange ◽  
Special Cases ◽  
Product Value ◽  
Group Members ◽  
Key Derivation

Abstract We revisit a generic compiler from a two-party key exchange (KE) protocol to a group KE (GKE) one by Just and Vaudenay. We then give two families of GKE protocols from static assumptions, which are obtained from the general compiler. The first family of the GKE protocols is a constant-round GKE by using secure key derivation functions (KDFs). As special cases, we have such GKE from static Ring-LWE (R-LWE), where “static” means that the parameter size in the R-LWE does not depend on the number of group members, n, and also from the standard SI-DDH and CSI-DDH assumptions. The second family consists of two-round GKE protocols from isogenies, which are proven secure from new isogeny assumptions, the first (resp. second) of which is based on the SIDH (resp. CSIDH) two-party KE. The underlying new static assumptions are based on indistinguishability between a product value of supersingular invariants and a random value.

Lattice Based Group Key Exchange Protocol in the Standard Model

2021 ◽  
Author(s):  
Parhat Abla
Keyword(s):  
Standard Model ◽  
Quantum Algorithms ◽  
Random Oracle Model ◽  
Random Oracle ◽  
Key Exchange ◽  
Session Key ◽  
Group Key ◽  
Group Key Exchange ◽  
The Standard Model ◽  
Group Members

Group key exchange schemes allow group members to agree on a session key. Although there are many works on constructing group key exchange schemes, but most of them are based on algebraic problems which can be solved by quantum algorithms in polynomial time. Even if several works considered lattice based group key exchange schemes, believed to be post-quantum secure, but only in the random oracle model. In this work, we propose a group key exchange scheme based on ring learning with errors problem. On contrast to existing schemes, our scheme is proved to be secure in the standard model. To achieve this, we define and instantiate multi-party key reconciliation mechanism. Furthermore, using known compiler with lattice based signature schemes, we can achieve authenticated group key exchange with postquantum security.

Efficient group key exchange protocol with strong security

2010 ◽  
Vol 30 (7) ◽  
pp. 1805-1808
Author(s):  
Shao-feng DENG ◽  
Fan DENG ◽  
Yi-fa LI
Keyword(s):  
Key Exchange ◽  
Key Exchange Protocol ◽  
Group Key ◽  
Group Key Exchange

Fast and Efficient Group Key Exchange in Controller Area Networks (CAN)

2021 ◽  
pp. 1-1
Author(s):  
Adrian Musuroi ◽  
Bogdan Groza ◽  
Lucian Popa ◽  
Pal-Stefan Murvay
Keyword(s):  
Key Exchange ◽  
Group Key ◽  
Controller Area Networks ◽  
Group Key Exchange

Resource-aware protocols for authenticated group key exchange in integrated wired and wireless networks

2007 ◽  
Vol 177 (23) ◽  
pp. 5441-5467 ◽  
Author(s):  
Junghyun Nam ◽  
Juryon Paik ◽  
Ung Mo Kim ◽  
Dongho Won
Keyword(s):  
Wireless Networks ◽  
Key Exchange ◽  
Group Key ◽  
Group Key Exchange ◽  
Authenticated Group Key ◽  
Resource Aware
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