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Assume input 10-bit key, K: 1010000010 for the SDES algorithm. What is K1?

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Assume input 10-bit key, K: 1010000010 for the SDES algorithm. What is K1?

(a) 10100100

(b) 01011011

(c) 01101000

(d) 10100111

I got this question in class test.

I need to ask this question from The Simplified Data Encryption Standard (SDES) topic in section Block Ciphers and the Data Encryption Standard of Cryptograph & Network Security

1 Answer

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Right option is (a) 10100100

Best explanation: The permuted key P10 = 1000001100. Input to P8: 0000111000 and

K1 is 10100100.

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