Google parent Alphabet is reportedly close to a $30 billion acquisition of cybersecurity startup Wiz.The deal could bolster Alphabet's cloud computing efforts by offering Wiz's enhanced security features.If successful, it will be Google's biggest acquisition ever, surpassing the $12.5 billion Motorola Mobility purchase.Wiz, valued at $12 billion, previously rejected a $23 billion bid and was planning for an initial public offering.