Rainer Plaga

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We propose a new hypothesis for the origin of the major part of non-solar hadronic cosmic rays (CRs) at all energies: highly relativistic, narrowly collimated jets from the birth or collapse of neutron stars (NSs) in our Galaxy accelerate ambient disk and halo matter to CR energies and disperse it in hot spots which they form when they stop in the Galactic(More)
In this contribution a survey is presented about the possibilities and difficulties of a cryptographic protection of biometric information for the purpose of authentication. The crucial role of sufficient information content of biometric templates will be presented. It will be shown how to use this approach of a cryptographic protection of biometric(More)
The question of whether collider produced of subnuclear black holes might constitute a catastrophic risk is explored in a model of Casadio & Harms (2002) that treats them as quantum-mechanical objects. A plausible scenario in which these black holes accrete ambient matter at the Eddington limit shortly after their production, thereby emitting Hawking(More)
The Crab Nebula has been observed by the HEGRA (High-Energy GammaRay Astronomy) stereoscopic system of imaging air Čerenkov telescopes (IACTs) for a total of about 200 hrs during two observational campaigns: from September 1997 to March 1998 and from August 1998 to April 1999. The recent detailed studies of system performance give an energy threshold and an(More)
The characteristic novelty of what is generally meant by a “physical unclonable function” (PUF) is precisely defined, in order to supply a firm basis for security evaluations and the proposal of new security mechanisms. A PUF is defined as a hardware device which implements a physical function with an output value that changes with its argument. A PUF can(More)
Based on the “cannonball model” for gamma-ray bursts of Dar and De Rújula it is proposed that masses of baryonic plasma (“cannonballs”), ejected in bipolar supernova explosions in our Galaxy are the sources of hadronic Galactic cosmic rays (CRs) at all energies. The propagation of the cannonballs in the Galactic disk and halo is studied. Two mechanisms for(More)
The Trusted Platform Module TPM is a basic but nevertheless very complex security component that can provide the foundations and the root of security for a variety of applications. In contrast to the TPM, other basic security mechanisms like cryptographic algorithms or security protocols have frequently been subject to thorough security analysis and formal(More)
  • Rainer Plaga
  • International Journal of Information Security
  • 2009
This article surveys use cases for cryptographic keys extracted from biometric templates (“biometric keys”). It lays out security considerations that favor uses for the protection of the confidentiality and privacy of biometric information itself. It is further argued that the cryptographic strength of a biometric key is determined by its true information(More)
We specify a system for authentication and key derivation using genetic fingerprints which prevents the recovery of biometric information from data stored for verification. We present a detailed security analysis based on es­ timates of the entropy of the DNA data and formal security results. The scheme is shown to be robust and efficient by analysing the(More)