Who is the god of this world (2 Corinthians 4:4)?

Satan or God?

I came across this paper by Donald E. Hartley, Ph.D. entitled "2 Corinthians 4:4: A Case for Yahweh as the ‘God of this Age.'" I think it's very interesting:

The phrase “the god of this age/world” (2 Cor 4:4), according to most scholars, designates Satan or the devil.1 Appreciation of this near consensus begins with an awareness of the historical development and considering additional evidence marshaled to support it. This paper will address the meaning of the passage as it relates to its context, point out its sapiential background, and link it with Isa 6:9-10. The goal will be to show that Yahweh is the “god of this age” and that “hardening,” mentioned in 2 Cor 3:14, is a non-transformational withholding of salvific wisdom (in regeneration) designed to perpetuate the spiritual blindness mentioned in 2 Cor 4:4.2

You can read the PDF here