ENVISAT PRODUCTS SECURE BROWSING IN MOBILE CLIENTS USING JPEG2000 INTERACTIVITY PROTOCOL Hélder Carvalho, António Serra, Luís Dias, Carlos Serrão and Miguel Dias ADETTI/ISCTE, Avenida das Forças Armadas – Edifício ISCTE, 1600-082 Lisboa, Portugal {helder.carvalho, antonio.serra, luis.dias, carlos.serrao, miguel.dias}@adetti.iscte.pt ABSTRACT Taking advantage of the mobile platforms to interact with the HICOD2000 system has been the motivation for the work described in this paper. Regardless of the limited resources available in mobile platforms the authors demonstrate that using the features of the HICOD2000 system the mobile device might be of major assistance in the field where satellite imagery may have an important and useful role. This paper describes an extension of the HICOD2000 system, available to the public through the ESA Service Support Environment. The EO JPEG2000 compressed products have achieved good compression ratios, minimizing both storage space and bandwidth. Regarding security to sensitive data the system enforces user access rights via a digital rights management platform called OpenSDRM. The mobile device has been endowed with the implementation of the JPIP protocol to optimize network bandwidth as well as the necessary components to interface with the OpenSDRM platform and decode JPSEC protected images: the OpenSDRM wallet and the protection tool. 1. INTRODUCTION A system called HICOD2000, derived from a project developed in collaboration between two Portuguese partners and the European Space Agency that exploited the possibilities offered by the emerging image encoding standard – JPEG2000 – and its applicability to Earth Observation Products, has been the motivation for the work described in this paper. In the HICOD2000 system all ENVISAT products where evaluated in their suitability for JPEG2000 lossless compression [1], resulting in the use of the following: MERIS [2], ASAR [3], GOMOS [3], ATTSR [5], RA2 [6] and SCIAMACHY [7, 8]. These products are coded in the ESA’s proprietary format Payload Data Segment which has no compression at all resulting in quite large files unsuitable for interactive access over the Internet. The lossless compressed products using the JPEG2000 standard and stored in JP2 file format [9] have proved to achieve good compression ratios without information loss minimizing both the need of storage space as well the bandwidth for Internet transfer. The current ESA’s product delivery method is based on regular mail for sending the products in optical disks to the customer premises. To use an Internet based delivery method, security has to be a major requirement. In the HICOD2000 system, the EO JPEG2000 compressed products have been secured using the JPEG2000 standard Part 8: JPSEC [10]. This part of the standard allows a security granularity based on the image resolution the client acquires which is controlled and enforced via a digital rights management (DRM) platform called OpenSDRM [11]. The HICOD2000 was made available to the public through the ESA Service Support Environment (SSE). The system was entirely based on PC-platforms and the only way to access data was to have the interactive secure client viewer installed on a PC [12, 13]. However, mobility is becoming more and more a nowadays’ requirement. A new paradigm is emerging - Anything, Anytime and, Anywhere is gaining more and more popularity, as new more powerful portable devices emerge on a daily basis – the connected PC is currently not enough for some EO data related applications. This new paradigm is a response to some activities needs and can be used to open the use of EO data related applications to a new array of services that, due to limited technical capacities of the mobile platforms, were until this date limited to the desktop PCs world. Events like the Asian tsunami or hurricane Katrina have shown that rescue operations are still far from optimal and that disaster area operation teams could benefit from the use of satellite images, on mobile devices, to coordinate and manage efforts on disaster areas. Other activities like agriculture, with concepts like crop scouting, that uses satellite images to identify patches of weed, draining problems or crop conditions, could also benefit with the appearance of new systems that allowed the use of EO data on a mobile environment. The identification of potential activities that could use this system is far from short and the authors can state a few more like outdoor sports activities, tourism, education, security, environmental management, etc. Having in mind the introduction of access to EO data in the Anything, Anytime, Anywhere paradigm the authors of this paper propose a new way to access ENVISAT products through mobile platforms, in particular SmartPhones and PocketPCs. However, being able to support JPEG2000 access in a mobile client platform _____________________________________________________ Proc. ‘Envisat Symposium 2007’, Montreux, Switzerland 23–27 April 2007 (ESA SP-636, July 2007)