The Johns Hopkins University

Gary L Jackson, Ii

David R Zaret

William J La Cholter

Sterling E Vinson

Vivian Maloney

Kiel R Gordon

Jonathan Z Gehman

Prathibha S Rama

Khadir A Griffith

Charles C Schneider

Deanna T Hlavacek

Brian E Ahr

Anthony J Castellani

A test environment apparatus having processing circuitry is provided for testing an embedded system-under-test. The processing circuitry may be configured to implement the system-under-test for interaction with external test participants via messaging and control operation of an inner agent and an outer agent. The inner agent may be implemented within a virtual machine that is also implementing the system-under-test and the outer agent may be implemented external to the virtual machine implementing the system-under-test. The inner agent and the outer agent may be controlled to operate collaboratively to trigger captures of snapshots that store current states of the system-under-test at respective times and trigger a rollback of the system-under-test based on a timestamp of a delayed message using a snapshot for a selected time that provides a state of the system-under-test prior to the timestamp to permit subsequent delivery of the delayed message with the system-under-test in a rollback state.

Virtual time test environment

Disclosed herein are system, method, and computer program product embodiments for performing a set of operations on one or more encrypted numbers to be an approximation of performing an algebraic operation on the one or more encrypted number. A server can receive from a client, a public key of a fully homomorphic encryption scheme and one or more encrypted numbers, and perform a set of operations comprising a square root function, a rectified linear activation function (ReLU), or a multiplicative inverse function on the one or more encrypted numbers to generate an encrypted operational result. The encrypted operational result generated by the set of operations can be an approximation of performing an algebraic operation on the one or more encrypted number. The server can further transmit to the client the encrypted operational result.

Approximate algebraic operations for homomorphic encryption

Apparatuses and methods for performing computational workflow management are provided. An example apparatus may include processing circuitry. The processing circuitry may be configured to receive a computation resource reservation request for cache from a client to perform a computation, and decompose the computation into a workflow of tasks, generate a task label for each task result and the associated task, and compare a selected task label with previous task labels to determine if the selected task label matches one of the previous task labels. The processing circuitry may be further configured to, in response to determining that the selected task label matches one of the previous task labels, perform the computation using a task result that is associated with the matched one of the previous task labels that is currently stored in the cache for the task result of the selected task label.

Apparatus and method for computational workflow management

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Laurel, MD, United States of America

Gary L Jackson, Ii