1 citations · 2 across the 7 of their papers we have counts for
12 papers
Efficient Polynomial-Time Decoding of Simplicial Anticodes with Near-Optimal Performance
Antonio Jesús Lorite-López, Daniel Camazón-Portela, Juan Antonio López-Ramos
In this work, we propose an efficient decoding algorithm for codes arising from simplicial complexes, a family of binary linear codes for which no decoding method of this type was…
Semigroup action based on skew polynomial evaluation with applications to Cryptography
Daniel Camazón-Portela, Juan Antonio López-Ramos
Through this work we introduce an action of the skew polynomial ring over based on its polynomial valuation and the concept of…
A generalization of Burmester-Desmedt GKE based on a non-abelian finite group action
Daniel Camazón Portela, Álvaro Otero Sánchez, Juan Antonio López Ramos
The advent of large-scale quantum computers implies that our existing public-key cryptography infrastructure has become insecure. That means that the privacy of many mobile applica…
On the solutions of linear systems over additively idempotent semirings
Álvaro Otero Sánchez, Daniel Camazón, Juan Antonio López Ramos
The aim of this article is to solve the system where , and is an unknown vector of size , being an additively idempot…
Cryptoanalysis of a key exchange protocol based on a congruence-simple semiring action
Otero Sanchez Alvaro, Lopez Ramos Juan Antonio
We show that a previously introduced key exchange based on a congruence-simple semiring action is not secure by providing an attack that reveals the shared key from the distributed…
Error-Correcting Codes on Projective Bundles over Deligne-Lusztig varieties
Daniel Camazón Portela, Juan Antonio López Ramos
The aim of this article is to give lower bounds on the parameters of algebraic geometric error-correcting codes constructed from projective bundles over Deligne--Lusztig surfaces.…
An Application of Group Theory in Confidential Network Communications
Juan Antonio Lopez-Ramos, Joachim Rosenthal, Davide Schipani +1
A new proposal for group key exchange is introduced which proves to be both efficient and secure and compares favorably with state of the art protocols.
Public Key Protocols over the Ring E_p(m)
Joan-Josep Climent, Juan Antonio Lopez-Ramos
In this paper we use the nonrepresentable ring E_p(m)to introduce public key cryptosystems in noncommutative settings and based on the Semigrouop Action Problem and the Decompositi…
An active attack on a distributed Group Key Exchange system
Mohamed Baouch, Juan Antonio López-Ramos, Reto Schnyder +1
In this work, we introduce an active attack on a Group Key Exchange protocol by Burmester and Desmedt. The attacker obtains a copy of the shared key, which is created in a collabor…
An Active Attack on a Multiparty Key Exchange Protocol
Reto Schnyder, Juan Antonio Lopez-Ramos, Joachim Rosenthal +1
The multiparty key exchange introduced in Steiner et al.\@ and presented in more general form by the authors is known to be secure against passive attacks. In this paper, an active…
Group key management based on semigroup actions
Juan Antonio Lopez-Ramos, Joachim Rosenthal, Davide Schipani +1
In this work we provide a suite of protocols for group key management based on general semigroup actions. Construction of the key is made in a distributed and collaborative way. Ex…
Managing key multicasting through orthogonal systems
Jose' Antonio Alvarez-Bermejo, Juan Antonio Lopez-Ramos, Joachim Rosenthal +1
In this paper we propose a new protocol to manage multicast key distribution. The protocol is based on the use of orthogonal systems in vector spaces. The main advantage in compari…