Question: 1) The Content Scramble System (CSS) is an encryption system employed on many commercially produced DVD-Video discs. CSS employs a stream cipher and mangles the

1) The Content Scramble System (CSS) is an encryption system employed on many commercially produced DVD-Video discs. CSS employs a stream cipher and mangles the keystream with the plain-text data to produce the cipher text. The stream cipher is based on two Linear Feedback Shift Register (LFSR) and set up with a 40-bit seed. This encryption algorithm has been badly broken. Please answer the following questions regarding CSS implementation. a) Partial credit 1: Draw an 8-bit LFSR and explain how it can produce a sequence of bits that appears random. [0.5 point b) Partial credit 2: Please identify number of bits in each of the following LFSRs that have been utilized in the design of CSS. In addition, Please explain how CSS can be broken. [0.5 points] ???-bit LFSR +(mod 256) ???-bit LFSR 1) The Content Scramble System (CSS) is an encryption system employed on many commercially produced DVD-Video discs. CSS employs a stream cipher and mangles the keystream with the plain-text data to produce the cipher text. The stream cipher is based on two Linear Feedback Shift Register (LFSR) and set up with a 40-bit seed. This encryption algorithm has been badly broken. Please answer the following questions regarding CSS implementation. a) Partial credit 1: Draw an 8-bit LFSR and explain how it can produce a sequence of bits that appears random. [0.5 point b) Partial credit 2: Please identify number of bits in each of the following LFSRs that have been utilized in the design of CSS. In addition, Please explain how CSS can be broken. [0.5 points] ???-bit LFSR +(mod 256) ???-bit LFSR
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