Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

2. /25 Alice and Bob are using BB-84 to establish a secret key. Eve knows that if she measures in a random basis it will

image text in transcribed

2. /25 Alice and Bob are using BB-84 to establish a secret key. Eve knows that if she measures in a random basis it will disturb Alice's transmissions and cause errors in Bob's copy of the secret key. Then Alice and Bob will notice her eavesdropping. So, she will be sneaky. With probability 1 p, Eve will not measure Alice's signal at all, but with probability p she will measure randomly in either {[0),(1)} or {I+), 1}}. Consider a case when Alice transmits in the same basis that Bob measures in. Given the attack by Eve, calculate as a function of p the probability that Bob's measurement outcome (i.e., his key bit) is equal to the bit transmitted by Alice. 2. /25 Alice and Bob are using BB-84 to establish a secret key. Eve knows that if she measures in a random basis it will disturb Alice's transmissions and cause errors in Bob's copy of the secret key. Then Alice and Bob will notice her eavesdropping. So, she will be sneaky. With probability 1 p, Eve will not measure Alice's signal at all, but with probability p she will measure randomly in either {[0),(1)} or {I+), 1}}. Consider a case when Alice transmits in the same basis that Bob measures in. Given the attack by Eve, calculate as a function of p the probability that Bob's measurement outcome (i.e., his key bit) is equal to the bit transmitted by Alice

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Spatial Databases With Application To GIS

Authors: Philippe Rigaux, Michel Scholl, Agnès Voisard

1st Edition

1558605886, 978-1558605886

More Books

Students also viewed these Databases questions