This is a cryptology question. Not sure how to prove the secureness of the function below.

I think this is enough info.

Let E : {0,1}k * {0,1}k {0,1}k be a secure pseudorandom permutation (i.e., a block cipher), Let E be a secure block cipher as defined above. Prove that the function G(K) = Ek(1k)||EK(ok) is a secure pseudorandom generator. Let E : {0,1}k * {0,1}k {0,1}k be a secure pseudorandom permutation (i.e., a block cipher), Let E be a secure block cipher as defined above. Prove that the function G(K) = Ek(1k)||EK(ok) is a secure pseudorandom generator