Towards an auditable cryptographic access control to high-value sensitive data

We discuss the challenge of achieving an auditable key management for cryptographic access control to high-value sensitive data. In such settings it is important to be able to audit the key management process - and in particular to be able to provide verifiable proofs of key generation. The auditable key management has several possible use cases in both civilian and military world. In particular, the new regulations for protection of sensitive personal data, such as GDPR, introduce strict requirements for handling of personal data and apply a very restrictive definition of what can be considered a personal data. Cryptographic access control for personal data has a potential to become extremely important for preserving industrial ability to innovate, while protecting subject's privacy, especially in the context of widely deployed modern monitoring, tracking and profiling capabilities, that are used by both governmental institutions and high-tech companies. However, in general, an encrypted data is still considered as personal under GDPR and therefore cannot be, e.g., stored or processed in a public cloud or distributed ledger. In our work we propose an identity-based cryptographic framework that ensures confidentiality, availability, integrity of data while potentially remaining compliant with the GDPR framework

Faunal dynamics across the Silurian-Devonian positive isotope excursions (δ13C, δ18O) in Podolia, Ukraine: Comparative analysis of the ireviken and klonk events

Two global isotopic events, the early Sheinwoodian (early Wenlock) and that at the Silurian-Devonian transition, have been comprehensively studied in representative carbonate successions at Kytayhorod and Dnistrove, respectively, in Podolia, Ukraine, to compare geochemistry and biotic changes related correspondingly to the Ireviken and Klonk events. These two large-scale isotope excursions reveal different regional ecosystem tendencies. The well-defined increasing trend across the Llandovery-Wenlock boundary in siliciclastic input, redox states and, supposedly, bioproductivity, was without strict correlative relations to the major 13C enrichment event. The environmental and biotic evolution was forced by eustatic sea-level fluctuations and two-step climate change toward a glaciation episode, but strongly modified by regional epeirogeny movements due to location near the mobile Teisseyre-TÖrnquist Fault Zone. Thus, the global early Sheinwoodian biogeochemical perturbation was of minor depositional significance in this epeiric sea, as in many other Laurussian domains. Conversely, the Podolian sedimentary record of the Klonk Event exhibits temporal links to the abrupt δ13C anomaly, overprinted by a tectonically driven deepening pulse in the crucial S-D boundary interval. This carbon cycling turnover was reflected in the regional carbonate crisis and cooling episodes, paired with a tendency towards eutrophication and recurrent oxygen deficiency, but also with major storms and possible upwelling. Faunal responses in both Podolian sections follow some characters of the Silurian pattern worldwide, as manifested by conodont changeover prior to the major early Sheinwoodian isotopic/climatic anomaly. This contrasts with the relative brachiopod and chitinozoan resistances in the course of the Ireviken Event. Also, during the Klonk Event, a moderate faunal turnover, both in benthic and pelagic groups, occurred only near the very beginning of the prolonged 13C-enriched timespan across the system boundary, possibly due to progressive dysoxia and temperature drop. The characters point to a peculiarity of the Klonk Event by comparison with the Silurian global events, and some similarity already to the succeeding Devonian transgressive/anoxic episodes

Digital Method for Verifying Archaeological Hypotheses. Medieval Gord Under Pułtusk Castle

This paper describes the process of collaboration between architects and archaeologists started in 2012 on the virtual reconstruction of the medieval proto-urban site in Pultusk, Poland. The result was digital reconstruction of urban structure based on parametric methods supported by 3D printing. The paper summarizes the process consisting of organizing analog data, digitizing it, enriching with experts’ knowledge and creating procedural model of the settlement. The whole process ended with not only digital and physical, 3D printed model, but also a set of conclusions confirming usefulness of such methods in scientific research concerning interpretation of archaeological relicts in situation, when not all information is available and clear. Both archaeological practice and the process of architectural reconstruction confirm that reliability of scientific research and the regime of logical reasoning are independent from used technology, however they may be effectively supported by new methods and tools

Journal Club

Gastrektomia D2 jest metodą leczenia chorych na operacyjnegoraka żołądka rekomendowaną w amerykańskichi europejskich zaleceniach oraz preferowaną we wschodniejAzji

Journal Club

Standardowym postępowaniem u chorych w podeszłymwieku na złośliwe glejaki mózgu jest radioterapia, natomiastrola chemioterapii jest nadal niejasna.Standardowym postępowaniem u chorych w podeszłymwieku na złośliwe glejaki mózgu jest radioterapia, natomiastrola chemioterapii jest nadal niejasna