Abstract. The Tamarin prover supports the automated, unbounded, symbolic analysis of security protocols. It features expressive languages for specifying protocols, adversary models, and properties, and support for efficient deduction and equational reasoning. We provide an overview of the tool and its applications.

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We formally analyze the family of entity authentication protocols defined by the ISO/IEC 9798 standard and find numerous weaknesses, both old and new, including some that violate even the most basic authentication guarantees. We analyse the cause of these weaknesses, propose repaired versions of the protocols, and provide automated, machinechecked proofs of the correctness of the resulting protocols. From an engineering perspective, we propose two design principles for security protocols that suffice to prevent all the weaknesses. Moreover, we show how modern verification tools can be used for falsification and certified verification of security standards. The relevance of our findings and recommendations has been acknowledged by the responsible ISO working group and an updated version of the standard will be released.

Experiments with electron or ion matter waves require a coherent, monochromatic and long-term stable source with high brightness. These requirements are best fulfilled by single atom tip (SAT) field emitters. The performance of an iridium covered W(111) SAT is demonstrated and analyzed for electrons in a biprism interferometer. Furthermore we characterize the emission of the SAT in a separate field electron and field ion microscope and compare it with other emitter types. A new method is presented to fabricate the electrostatic charged biprism wire that separates and combines the matter wave. In contrast to other biprism interferometers the source and the biprism size are well defined within a few nanometers. The setup has direct applications in ion interferometry and Aharonov-Bohm physics.

Trauma events are 4 times more prevalent in inmates than in the general public and are associated with increased recidivism and other mental and physical health issues. Inmates (N = 181) with a moderate-to high-risk criminal profile were randomly assigned to either a Transcendental Meditation (TM) program or to a no-treatment control group. Significant reductions in total trauma symptoms in the TM group were found compared with controls.