Group of answer choices Alice, the sender, has two messages m0 and m1; she knows exactly which one will be received by Bob the receiver. Alice, the sender, has two messages m0 and m1; she does not know which one will be received by Bob the receiver. The sender and receiver do not need to exchange secret messages during the information transfer. The sender and receiver need to exchange secret messages during the information transfer.
Group of answer choices Alice, the sender, has two messages m0 and m1; she knows exactly which one will be received by Bob the receiver. Alice, the sender, has two messages m0 and m1; she does not know which one will be received by Bob the receiver. The sender and receiver do not need to exchange secret messages during the information transfer. The sender and receiver need to exchange secret messages during the information transfer.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question
1. Which of the following description regarding the 1–2 oblivious transfer are correct?
Group of answer choices
Alice, the sender, has two messages m0 and m1; she knows exactly which one will be received by Bob the receiver.
Alice, the sender, has two messages m0 and m1; she does not know which one will be received by Bob the receiver.
The sender and receiver do not need to exchange secret messages during the information transfer.
The sender and receiver need to exchange secret messages during the information transfer.
2. Suppose assume cloud provider is (potentially) malicious. We can take the following ways to protect users' privacy and enhance the system's security.
Group of answer choices
Asymmetric-key encryption
Homomorphic encryption
Obfuscation
Symmetric-key encryption
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