Astav, Inc.

Hewlett-Packard Development Company, L.p.

Hewlett-Packard Company

Alexandre Bronstein

Alan Hersh Karp

Rajiv Gupta

Sharad Singhal

Sandeep Kumar

Ira Cohen

Venkatesh Krishnan

Arindam Banerji

Chia-Chiang Chao

Ernest Mak

Guillermo Rozas

Joydip Das

Alon Waksman

Marsha Prescott Duro

Techniques for authenticating a login that avoid the imposition of memorization burdens on users of a computer system. The present techniques include determining whether an appropriate token is stored on a client system that originates the login, authenticating a login by communicating with a user via a secondary communication channel, and authenticating a login by engaging in a private question/private answer dialogue with a user.

Authenticating a login

A human test that is based on a human conceptual capability. A human test according to the present techniques includes posing a question that is selected to exercise a human conceptual capability, obtaining an answer to the question, and comparing the answer to a correct answer that would be rendered by a human being.

Human test based on human conceptual capabilities

A method for adapting a Bayesian network includes determining a set of parameters for the Bayesian network, for example, initial parameters, and then updating the parameters in response to a set of observation data using an adaptive learning rate. The adaptive learning rate responds to any changes in the underlying modeled environment using minimal observation data.

Adapting Bayesian network parameters on-line in a dynamic environment

Techniques for protecting a service provider from abuse include methods for protecting an object that is intended to be rendered to an authentic human client of the service provider from capture as well as methods for protecting against using low-paid laborers to abuse a service provider.

Protecting a service provider from abuse

A health assessor for assessing health of a target element within a multi-element system includes multiple sensors, each being operatively coupled to the target element to produce measures of the target element. The health assessor also includes measure collectors, each of which collects a measure from one of the sensor. In addition, the health assessor includes evaluators. Each evaluator evaluates at least a subset of all the measures collected by the measure collectors in accordance with (1) a predefined evaluation definition for the respective evaluator and (2) at least a subset of all historical measures to provide an assessment. A probabilistic reasoning network is coupled to the evaluators to receive the assessment from each of the evaluators and to combine all the assessments in accordance with a pre-configured reasoning definition so as to provide an overall health assessment of the target element. A health assessment system including the health assessor is also described.

Assessing health of a subsystem or service within a networked system

Techniques for defense against unwanted communications by striking back against the beneficiaries of the unwanted communications include identifying a communication channel to a beneficiary of an unwanted communication and sending a communication via the communication channel to the beneficiary such that the communication imposes a cost to the beneficiary. The cost to the beneficiary may be used to deter further unwanted communication from the beneficiary.

Defending against unwanted communications by striking back against the beneficiaries of the unwanted communications

A software infrastructure for providing an open digital services marketplace including a naming manager that enables a requesting task to refer to a desired resource using a name which is local to the requesting task and a router that forwards the request to an appropriate handler for the desired resource and that enables at least one additional task to be invoked in response to the request. The infrastructure includes a permission manager that compares a set of access rights of the requesting task to the desired resource to a set of permissions associated with the desired resource such that the access rights are kept separately from the reference to the desired resource. The desired resource, the requesting task, the additional task, and a set of additional components used to handle the request are each modeled as a resource defined by a corresponding set of meta-data which includes a set of attributes and a reference to a grammar for interpreting the attributes.

Growing community of inventors

Palo Alto, CA, United States of America

Alexandre Bronstein