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Consider the following encryption scheme. It supports plaintexts from M = { 0 , 1 } ^ and ciphertexts from C = { 0 ,

Consider the following encryption scheme. It supports plaintexts from M ={0,1}^ and ciphertexts from C ={0,1}2^. Its keyspace is:
K = : in {0,1,_}2^| k contains exactly \lambda "-" characters k 2\lambda
To encrypt plaintext m under key k, we "fill in" the characters in k using the bits of m.
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2021
CHAPTER 2. THE BASICS OF PROVABLE SECURITY
Show that the scheme does not have one-time secrecy, by constructing a program that distinguishes the two relevant libraries from the one-time secrecy definition.
Example: Below is an example encryption of m =1101100001.
k1_0__11010_1_0_0_ m=1101 Enc(k, m)=11100111010110000001

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