Minimum of 100 word per question; APA format with reference.

Opinions vary on whether cloud databases are more or less secure than in-house hosted databases. Some experts claim that cloud databases from reputable vendors such as Microsoft, Amazon, and Oracle are far more secure than in-house hosted ones. Others claim that the risk of mismanagement by a cloud vendor is too high; organizations should store critical and confidential data only in-house.

1. Does compliance with ISO 27001 mean that a data center is secure? Does it mean that no security threat against compliant data centers will be successful? What does it mean?