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I want to modify a standard block cipher in the following way. I replace each round key by a key picked at random. Is this block cipher as secure as the original one ?

Thank you.

EDIT

Some missing information related to the question, according to comment by OP to one of the answers:

My question is related to the key-schedule of AES, I wonder if we can replace it by something more stringent and be sure that the security will not be not worst than the original one.

I want to modify a standard block cipher in the following way. I replace each round key by a key picked at random. Is this block cipher as secure as the original one ?

Thank you.

EDIT

Some missing information related to the question, according to comment by OP to one of the answers:

My question is related to the key-schedule of AES, I wonder if we can replace it by something more stringent and be sure that the security will not be not worst than the original one.

I want to modify a standard block cipher in the following way. I replace each round key by a key picked at random. Is this block cipher as secure as the original one ?

Thank you.

I want to modify a standard block cipher in the following way. I replace each round key by a key picked at random. Is this block cipher as secure as the original one ?

Thank you.

EDIT

Some missing information related to the question, according to comment by OP to one of the answers:

My question is related to the key-schedule of AES, I wonder if we can replace it by something more stringent and be sure that the security will not be not worst than the original one.