Juan Antonio Lopez-Ramos, Joachim Rosenthal, Davide Schipani et al.
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.
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 Decomposition Problem respectively.
Juan Antonio Lopez-Ramos, Joachim Rosenthal, Davide Schipani et al.
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.