2009
Díaz-Sánchez, D., A. Marín, F. Almenárez, and A. Cortés. "Sharing conditional access
modules through the home network for Pay TV Access." Journal/Magazine: Transactions
on Consummer Electronics (Accepted, Pending to be published) (2009).
Abstract
: In this article we present a system for sharing a Conditional Access
Module among different visualization devices. Current pay-TV systems require having
conditional access modules and smart cards replicated at every visualization device
willing to access Pay-TV contents. In this article, we show how a home gateway,
capable of securely distribute decryption keys to home visualization device, an
inexpensive descrambler, and a home network, enable a flexible solution to access
Pay-TV.
2008
Cortés-Martín, A., C. García-Rubio, C. Campo, A. Marín López, F. Almenárez Mendoza,
and D. Díaz Sánchez. "Decoupling path failure detection from congestion control
to improve SCTP failovers." Journal/Magazine: IEEE COMMUN LETT. Vol:12. Issue:
11 (2008): Pages:858–860.
Abstract
: SCTP handover is too slow to be useful as a mobility solution for
most applications. With quicker handovers, SCTP will be an interesting solution
to mobility. SCTP uses retransmissions as probes for path failure detection. Congestion
control forces slow paced retransmissions but quick failovers need fast paced probes.
Our solution is to stop using retransmissions as probes. Instead, we propose active
path monitoring using unreliable heartbeats. Applications can tune this algorithm
to meet their own requirements. We show data from a simple experiment in a real
environment.
Keywords: Computer network reliability; congestion control; transport
protocols
Díaz-Sánchez, D., A. Marín, F. Almenarez, C. Campo, A. Cortés, and C. García-Rubio.
"Trust Negotiation Protocol Support for Secure Mobile Network Service Deployment."
Wireless and Mobile Networking. Ed. Springer Boston. Vol. 284/2008., 2008.
271–282.
Abstract
: User-centric services might enforce requirements difficult to be
endorsed by visited networks unless tight coupled trust relations are previously
established among providers. Maintaining those fixed trust relations is costly and
unmanageable if the number of providers increases. Moreover, it requires providers
to use a common security model, credentials, policies…Trust Negotiation can be the
solution to this problem since allows to negotiate gradually a security state enabling
multiple factor authentication and authorization even for “strangers” by exchanging
various credentials. However, there are still two problems to solve, the first one
is the delay introduced by the trust negotiation messages if used as bootstrapping
in every interaction; the second one is the lack of protocol support. In this article
we address those problems by presenting an extension to TLS that enables trust negotiation
and credential issuing (to speed-up following interactions) over a secure channel.
Diaz-Sanchez, D., A. Marin, F. Almenarez, and A. Cortes. "DVB-H Key Management System
for UMTS Capable Devices.", 2008. 1–2.
Abstract
: In this paper we present a system to enable pay-per- view services
in mobile handhelds which takes benefits of both DVB-H and UMTS networks. DVB-H
infrastructure provides a more appropriate content delivery framework that UMTS.
Despite this fact, UMTS can play an important role for charging and key distribution
for pay-per-view applications by means of the provider SIM smart card.
Keywords: 3G mobile communication, cryptography, digital video
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