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Quantitative Verification of Gossip Protocols for Certificate Transparency
Certificate transparency is a promising solution to publicly auditing Internet certificates. However, there is the potential of split-world attacks, where users are directed to fake versions of the log where they may accept fraudulent certificates. To ensure users are seeing the same version of a log, gossip protocols have been designed where users share and verify log-generated data. This thesis proposes a methodology of evaluating such protocols using probabilistic model checking, a collection of techniques for formally verifying properties of stochastic systems. It also describes the approach to modelling and verifying the protocols and analysing several aspects, including the success rate of detecting inconsistencies in gossip messages and its efficiency in terms of bandwidth. This thesis also compares different protocol variants and suggests ways to augment the protocol to improve performances, using model checking to verify the claims. To address uncertainty and unscalability issues within the models, this thesis shows how to transform models by allowing the probability of certain events to lie within a range of values, and abstract them to make the verification process more efficient. Lastly, by parameterising the models, this thesis shows how to search possible model configurations to find the worst-case behaviour for certain formal properties.
Dissertation
Three little birds
Blue is upset when Red and Yellow go to find worms without him, but feels even worse after starting a rumor that Red and Yellow are not getting along.
Book
Dirk Daring, secret agent
The spy missions of Darren Dirkowitz (aka Dirk Daring, Secret Agent) are interrupted when his stepbrother gets hold of his top-secret notebook.
Book
Perceived organizational politics and workplace gossip: the moderating role of compassion
Purpose
This study aims to examine perceived organizational politics (POP) as an antecedent to workplace gossip. While the commonly held belief is that POP is consequential to the existence of negative workplace gossip, an alternate hypothesis can be that POP may predict positive workplace gossip as well. The study further explores the role of compassion as a boundary condition in the relationship of POP with negative and positive valences of workplace gossip.
Design/methodology/approach
Using purposive sampling technique, the data were collected through time-lagged (two-wave) surveys from employees working in private (Study 1, n = 366) and public (Study 2, n = 206) sector organizations across India, and analyzed using SPSS AMOS 27 and PROCESS Macro (Model 1).
Findings
The results of Study 1 and Study 2 revealed that POP correlated positively with negative as well as positive workplace gossip. Further, it was found that compassion moderated the relationship of POP with negative workplace gossip but failed to moderate in the case of positive workplace gossip in both the studies.
Practical implications
This study makes practitioners aware of the ubiquity of the phenomenon of workplace gossip and encourages them to embrace gossip in the workplace rather than banishing it altogether.
Originality/value
This study delineates the link between POP and the valences of workplace gossip that remains unexplored in the literature. The study also takes into account the intervening role of compassion in the aforementioned relationships. The striking results of the study open new realms of research possibilities not only in the field of workplace gossip, but POP and compassion as well.
Journal Article
Trouble talk
Maya gets help from a school counselor when the new student she has tried to befriend upsets her, as she has other students, by spreading rumors, saying hurtful things, and sharing information that is not hers to share.
Book
