We propose a new encryption primitive called Membership Encryption. Let P(G) be a privacy-preserving token on a group attribute/identity G, such that given P(G) it is hard to know the attributes in G. In this membership encryption, if an encryption takes as input an attribute A and the token P(G) , the decryption requires holding the membership A ∈ G, i.e., A belongs to this group attribute. Me...

Group communication is an important paradigm for building highly available distributed systems. However, group membership operations often require the system to block message traffic, causing system services to become unavailable. This makes it important to quantify the unavailability induced by membership operations. This paper experimentally evaluates the blocking behavior of the group member...

Background: Although early conceptualisations posited an inverse relationship between psychopathy and self-injury, little research has tested this. Aims: To examine the selfinjurious thoughts and behaviour associated with psychopathy. Method: Data from the MacArthur Violence Risk Assessment Project were used to examine homogenous subtypes of participants based on their responses to six self-inj...

BACKGROUND Although early conceptualisations posited an inverse relationship between psychopathy and self-injury, little research has tested this. AIMS To examine the self-injurious thoughts and behaviours associated with psychopathy. METHODS Data from the MacArthur Violence Risk Assessment Project (N = 871) were used to examine homogenous subtypes of participants based on their responses t...

This paper uses a longitudinal data set from rural Bangladesh to analyze the factors that affect men‘s and women‘s ability to participate in groups and to engage in relationships with powerful and influential people. Unlike studies from other countries that find group membership to be positively correlated with wealth, this study finds that group membership, which is driven mostly by women‘s me...

Recent theoretical work has highlighted potential links between interpersonal collaboration and group membership in the evolution of human sociality. Here we compared the effects of collaboration and minimal-group membership on young children’s prosocial behavior (i.e., helping and resource allocation), liking, affiliation, and trust. In a design that matched as closely as possible these two wa...