Everything at Once, or Nothing at All

All or Nothing at All

We continue a study of unconditionally secure all-or-nothing transforms (AONT) begun in [12]. An AONT is a bijective mapping that constructs s outputs from s inputs. We consider the security of t inputs, when s − t outputs are known. Previous work concerned the case t = 1; here we consider the problem for general t, focussing on the case t = 2. We investigate constructions of binary matrices fo...

On Existing All at Once

e nature of divine eternality is obscure in both historical andmodern discussions. In a way its obscurity is no surprise, given that the nature of time is so mysterious. But the obscurity is still notable relative to the other traditional divine attributes, which are comparatively much better understood. Our perplexities regarding eternality are compounded, I will argue here, by a failure to re...

All-or-Nothing Monitoring

A principal can observe both the output and input of an agent who works at a job involving multiple tasks. We provide a simple theory that explains why it may be optimal for the principal to use only output-based incentive contract, even though the principal can monitor the agent’s actions perfectly in all but one task and knows exactly which action is optimal for each task. (JEL: D82, M5, J33)

Take-all or nothing

Take-all disease of Poaceae is caused by Gaeumannomyces graminis (Magnaporthaceae). Four varieties are recognised in G. graminis based on ascospore size, hyphopodial morphology and host preference. The aim of the present study was to clarify boundaries among species and varieties in Gaeumannomyces by combining morphology and multi-locus phylogenetic analyses based on partial gene sequences of I...

Overwriting : All or Nothing ?