PURPOSE Primary care providers' (PCPs') provision of time alone with an adolescent without the parents present (henceforth referred to as "confidential care") has a significant impact on adolescents' disclosure of risk behavior. To inform the development of interventions to improve PCPs' delivery of confidential care, we obtained the perspectives of adolescent males and their mothers about the ...

Encrypt-and-sign, where one encrypts and signs a message in parallel, is usually not recommended for confidential message transmission as the signature may leak information about the message. This motivates our investigation of confidential signature schemes, which hide all information about (high-entropy) input messages. In this work we provide a formal treatment of confidentiality for such sc...

In this paper, we present Confidential Domain of Execution (CDE), a mechanism for achieving confidential execution of software in an otherwise untrusted environment, e.g., at a Cloud Service Provider. This is achieved by using an isolated execution environment in which any communication with the outside untrusted world is forcibly encrypted by trusted hardware. The mechanism can be useful to ov...

We study a notion of secrecy that arises naturally in adversarial systems. Let all agents agree on a space of possible values. An honest agent chooses one of these values, and aims to make sure that this particular choice cannot be reliably guessed by an adversary, even in the context of a distributed protocol. An example is an agent that uses an honest mail server to send a message, wishing to...

We consider a relay channel where a relay helps the transmission of messages from one sender to one receiver. The relay is considered not only as a sender that helps the message transmission but as a wire-tapper who can obtain some knowledge about the transmitted messages. In this paper we study the coding problem of the relay channel under the situation that some of transmitted messages are co...