An Application of Group Theory in Confidential Network Communications
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.
cs.IT↗
arXiv subjects
Juan Antonio Lopez-Ramos
Publications and source records attributed to Juan Antonio Lopez-Ramos.
Group key management based on semigroup actions
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. Examples are provided that may in some cases enhance the security level and communication overheads of previous existing protocols. Security against passive attacks is considered and depends on the hardness of the semigroup action problem in any particular scenario.
cs.IT↗
Public Key Protocols over the Ring E_p(m)
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 Decomposition Problem respectively.
cs.IT↗
An Active Attack on a Multiparty Key Exchange Protocol
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 attack is presented assuming malicious control of the communications of the last two users for the duration of only the key exchange.
cs.IT↗
Managing key multicasting through orthogonal systems
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 comparison to other existing multicast key management protocols is that the length and the number of the messages which have to be sent are considerably smaller. This makes the protocol especially attractive when the number of legitimate receivers is large.
cs.CR↗