Enabling Practical IPsec authentication for the Internet

On the Move to Meaningful Internet Systems 2006: OTM 2006 Workshops (First International Workshop on Information Security (IS'06), OTM Federated Conferences and workshops). Montpellier, Oct,/Nov. 2006There is a strong consensus about the need for IPsec, although its use is not widespread for end-to-end communications. One of the main reasons for this is the difficulty for authenticating two end-hosts that do not share a secret or do not rely on a common Certification Authority. In this paper we propose a modification to IKE to use reverse DNS and DNSSEC (named DNSSEC-to-IKE) to provide end-to-end authentication to Internet hosts that do not share any secret, without requiring the deployment of a new infrastructure. We perform a comparative analysis in terms of requirements, provided security and performance with state-of-the-art IKE authentication methods and with a recent proposal for IPv6 based on CGA. We conclude that DNSSEC-to-IKE enables the use of IPsec in a broad range of scenarios in which it was not applicable, at the price of offering slightly less security and incurring in higher performance costs.Universidad de Montpellier IIPublicad

Description of a new species of Epicauta Dejean, 1834 from Mexico with a review of the Epicauta cupraeola species group (Coleoptera, Meloidae)

[EN] We describe a morphologically remarkable new species of the Epicauta cupraeola species group from the highlands of the State of Nayarit, Mexico. The external appearance of Epicauta cora sp. nov., is similar to that of Epicauta rufipennis and Epicauta diana, but it is distinct from both species based on male antennae structure, shape and pilosity of the head and pronotum, color of pronotal pilosity, and male fore-tarsal structure. The nine species integrating now the E. cupraeola species group have been revised. This study of 323 specimens, including diverse type material, confirms the synonymy of Cantharis rufescens with Epicauta basimacula first proposed by Pinto (1991), and reports new geographic records for Mexican taxa. The species of the E. cupraeola group are included in a key and illustrated photographically, including type specimens of five taxa. A phylogenetic re-analysis of the E. cupraeola species group results in the placement of the new species as sister to E. rufipennis, which together form a sister clade to the remaining species of the E. cupraeola group.[ES] Se describe una especie nueva, morfológicamente singular, del grupo de especies de Epicauta cupraeola de las zonas altas del Estado de Nayarit, México. La apariencia externa de Epicauta cora sp. nov., es similar a la de Epicauta rufipennis y Epicauta diana, pero difiere de ambas en la estructura de las antenas del macho, forma y pilosidad de la cabeza y pronoto, y estructura de las tibias anteriores del macho. Se revisan las nueve especies incluidas ahora en el grupo de especies de E. cupraeola. Este estudio que incluye 323 especímenes, entre ellos material tipo diverso, confirma la sinonimia de Cantharis rufescens con Epicauta basimacula propuesta por Pinto (1991), y aporta nuevos registros geográficos para las especies de México. Se presenta una clave para las especies del grupo de E. cupraeola y se ilustran fotográficamente, incluyendo ejemplares tipo de cinco taxones. Un nuevo análisis filogenético del grupo de E. cupraeola indica que la especie nueva se sitúa como grupo hermano de E. rufipennis, de forma que juntas constituyen el clado hermano de las demás especies del grupo.This work was supported by grant CGL2010-15786 from the Ministerio de Economia y Competitividad (Spain).Peer reviewe

Meloe (Taphromeloe) foveolatus Guérin de Méneville, 1842

Peer reviewe

La integración del mercado eleéctrico de los países nórdicos: - NORD POOL - lecciones para otros mercados

Este artículo describe el proceso de integración del mercado eléctrico de los países nórdicos, además de establecer algunas reflexiones sobre dicha experiencia, las cuales pueden ser tenidas en cuenta por regiones que se encuentran en el mismo proceso como es el caso de la Comunidad Andina de Naciones -CAN. Inicialmente hace alusión a los elementos teóricos que fundamentan el intercambio de bienes y servicios y los principios económicos que justifican la integración de mercados y, finalmente se concentra en el caso y algunos resultados del Nord Pool.This article describes the process of integration of the electrical market of the Nord Pool, besides to establish some reflections on this experience, which can be considered by regions that are in the same process as the case of the Andean Community of Nations - CAN. Initially this paper makes reference to the theoretical elements that base the exchange of goods and services and the economic principles that justify the integration of markets and finally are concentrate abaut the case and some results of the Nord Pool

Una Especie Nueva de Tillus Olivier, 1790 (Coleoptera Cleridae) de la Peninsula Ibérica

6 páginas, 2 figuras et al..[EN] Tillus ibericus sp. nov. is described from the Comunidad Autónoma de Madrid (Spain) and it is compared to the western Palaearctic species of the genus Tillus Olivier, 1790. Tillus ibericus is easily distinguished from all other species of the genus by the structure of the elytral sculpture and its characteristic coloration. This new species shares a general habitus and characters from the antennae, and general body stucture with T. flabellicornis Fairmaire, 1866, a species from northern Africa. All preexisting records of T. flabellicornis in the Iberian Peninsula correspond to T. ibericus.[ES]Se describe Tillus ibericus sp. nov. de la Comunidad Autónoma de Madrid (España) y se compara con las otras especies del género Tillus Olivier, 1790 de la región Paleártica occidental. Tillus ibericus se distingue con facilidad de las especies próximas por la estructura del punteado elitral y por su coloración característica. La especie nueva comparte un aspecto general y caracteres de la estructura del cuerpo y de las antenas con T. flabellicornis Fairmaire, 1866 del Norte de África. Todas las citas anteriores de T. flabellicornis de la Península Ibérica corresponden a T. ibericus sp. nov.Peer reviewe

Multiple introductions, polyploidy and mixed reproductive strategies are linked to genetic diversity and structure in the most widespread invasive plant across Southern Ocean archipelagos

This work received support from the Swiss Polar Institute and Ferring Pharmaceuticals through the Antarctic Circumnavigation Expedition (“ACE”). Additional fi- nancial and logistical support was provided by the South African National Research Foundation (NRF) and by the South African National Antarctic Programme (SANAP). MM and CH were also supported by the National Research Foundation (grant 89967). We thank Tasmanian Parks and Wildlife Service for granting ac- cess and collection permits for Macquarie Island and the Australian Antarctic Program for logistical support. We thank Institut polaire français Paul- Émile Victor for logistical support for sampling on Iles Kerguelen and Ile de la Possession. We thank wintering staff for sam- ple collection on Ile de la Possession. We thank the Department of Conservation for granting access and collection permits for the New Zealand islands. We thank Heritage Expeditions for providing logis- tics and voyage support. Collections were undertaken on the ACE expedition under permits granted to the expedition and its research- ers. Collections at the Prince Edward Islands, and at the Tristan da Cunha and Gough islands were permitted through the South African National Antarctic Program, notably via the Prince Edward Islands Management Committee for the former and the Tristan da Cunha Conservation Department for the latter.Biological invasions in remote areas that experience low human activity provide unique opportunities to elucidate processes responsible for invasion success. Here we study the most widespread invasive plant species across the isolated islands of the Southern Ocean, the annual bluegrass, Poa annua. To analyse geographical variation in genome size, genetic diversity and reproductive strategies, we sampled all major sub-Antarctic archipelagos in this region and generated microsatellite data for 470 individual plants representing 31 populations. We also estimated genome sizes for a subset of individuals using flow cytometry. Occasional events of island colonization are expected to result in high genetic structure among islands, overall low genetic diversity and increased self-fertilization, but we show that this is not the case for P. annua. Microsatellite data indicated low population genetic structure and lack of isolation by distance among the sub-Antarctic archipelagos we sampled, but high population structure within each archipelago. We identified high levels of genetic diversity, low clonality and low selfing rates in sub-Antarctic P. annua populations (contrary to rates typical of continental populations). In turn, estimates of selfing declined in populations as genetic diversity increased. Additionally, we found that most P. annua individuals are probably tetraploid and that only slight variation exists in genome size across the Southern Ocean. Our findings suggest multiple independent introductions of P. annua into the sub-Antarctic, which promoted the establishment of genetically diverse populations. Despite multiple introductions, the adoption of convergent reproductive strategies (outcrossing) happened independently in each major archipelago. The combination of polyploidy and a mixed reproductive strategy probably benefited P. annua in the Southern Ocean by increasing genetic diversity and its ability to cope with the novel environmental conditions.National Research Foundation 89967Antarctic Circumnavigation Expedition “ACE”South African National Research Foundation (NRF)South African National Antarctic Programme (SANAP