Leak-free mediated group signatures1

Leak-free mediated group signatures

Group signatures are a useful cryptographic construct for privacy-preserving non-repudiable authentication, and there have been many group signature schemes. In this paper, we introduce a variant of group signatures that offers two new security properties called leak-freedom and immediate-revocation. Intuitively, the former ensures that an insider (i.e., an authorized but malicious signer) be u...

A First-Order Leak-Free Masking Countermeasure

One protection of cryptographic implementations against sidechannel attacks is the masking of the sensitive variables. In this article, we present a first-order masking that does not leak information when the registers change values according to some specific (and realistic) rules. This countermeasure applies to all devices that leak a function of the distance between consecutive values of inte...

On the electron leak problem in orbital-free embedding calculations.

Computer simulation methods using orbital level of description only for a selected part of the larger systems are prone to the artificial charge leak to the parts which are described without orbitals. The absence of orbitals in one of the subsystems makes it impossible to impose explicitly the orthogonality condition. Using the subsystem formulation of density functional theory, it is shown tha...

Pulmonary Capillary Leak Syndrome

Could Plugging the Oxidation - Mediated Ca 2 Leak Stem

As the most common sustained arrhythmia, atrial fibrillation (AF) afflicts 2 million patients in the United States alone, and this number is predicted to double by the year 2050.1 Although AF is not life-threatening, it is linked to a 2-fold increase in mortality when present as a comorbidity in heart disease patients.2,3 AF can have devastating consequences, such as stroke, impaired cardiac pe...