Reference no: EM132534812
Assignment: Consider a Feistel cipher composed of sixteen rounds with a block length of 128 bits and a key length of 128 bits. Suppose that, for a given k, the key scheduling algorithm determines values for the first eight round keys, k1, k2, ....... k8, and then sets
k9 = k8, k10=k7, k11=k6, .... , k16=k1
Suppose you have a cipher-text c. Explain how, with access to an encryption oracle, you can decrypt c and determine m using just a single oracle query.
This shows that such a cipher is vulnerable to a chosen plain-text attack. (An encryption oracle can be thought of as a device that, when given a plain-text, returns the corresponding cipher-text. The internal details of the device are not known to you and you cannot break open the device. You can only gain information from the oracle by making queries to it and observing its responses.)
Provide answer as a discussion with 2 references.
MECH2300 Structures and Materials Assignment
: MECH2300 Structures and Materials Assignment Help and Solution, The University of Queensland - Assessment Writing Service
|
What are the issues and root causes
: What are the issues and root causes that necessitates the enactment and/or establishment of Federal, state and local government laws, and the establishment.
|
Compare and contrast different cloud computing services
: Compare and contrast two different cloud computing services (Amazon Web Service and Microsoft Azure). Explain the differences and the similarities.
|
Estimate what is yield to call
: Pay an 11% coupon rate with interest paid semi-annually, and have a 15-year maturity, but they can be called in 7 years at $1,125. What is their yield to call
|
Determine values for the first eight round keys
: Consider a Feistel cipher composed of sixteen rounds with a block length of 128 bits and a key length of 128 bits. Suppose that, for a given k, the key.
|
How will impact on the market risk of the portfolio
: If the investor bought $20,000 shares in A and A had a beta of 0.9, calculate the portfolio beta and explain how will impact on market risk of the portfolio?
|
How the news is covering the impeachment inquiry
: Each portion of the chart (left, center, right) should have several paragraphs as to how the news is covering the impeachment inquiry.
|
What is the amount of enmity liabilities
: Emmit had the following final balances after the 1st yr of operation asset 35500, stockholders equity 14700, What is the amount of enmity liabilities?
|
Not-for-profit organization
: A Not-For-Profit Organization (NFPO) received three cash donations:
|