**4.8 Absence of standard format of logs**

Logs are available in heterogeneous formats from different layers of a cloud at CSP. The logs provide information such as by whom, when, where, and why some incidents occurred. This is an important bottleneck to provide a generic solution for all CSPs and all types of logs. **Table 5** indicates the survey of literature that deals with the challenges of cloud forensics mainly for evidence collection process.

