Cloud computing allows sharing of data, storage, and access to computer resources over the internet. It has three main service models: Infrastructure as a Service (IaaS) provides basic services and hardware that users maintain; Platform as a Service (PaaS) provides software, hardware, and platforms automatically; and Software as a Service (SaaS) provides transparent access to software and hardware. Cloud computing also has four deployment models: public, community, private, and hybrid clouds. While cloud computing provides benefits, it also faces challenges regarding privacy, compliance with regulations, security, and potential abuse.

1. By: R.Dinesh Kumar

2. Overview
●Definition
●Service Models
●Deployment Models
●Issues
●Research
●Why its important?
●Q&A

3. Definition
Cloud computing:
–Internet-based computing in which large groups of
remote servers are networked so as to allow sharing
of data-processing tasks, centralized data storage,
and online access to computer services or resources.
–Any computer related task that is done entirely on
the Internet

4. What is Cloud Computing?
● Allows users to deal
with the software
without having the
hardware.
● Everything is done
by remote, nothing
is saved locally.

5. Characteristics
● Resource pooling
● On-Demand self-service
● Cost
● Measured and reporting service
● Virtualization
● Reliability
● Scalability and Elasticity
● Security
● Maintenance

6. Service Models
● Infrastructure as a Service (IaaS)
– Basic, service users maintain software
– Ex: Amazon EC2,S3
● Platform as a Service (PaaS)
– Users are given software and hardware
automatically
– Ex: Google App Engine
● Software as a Service (SaaS)
– All software and hardware is transparent
– User only knows their own access point
– Ex:Email,Social networks

7. Deployment Models
● Public cloud
– Done by service providers
● Community cloud
– organizations from a specific
community with common
concerns
● Private cloud
– operated solely for a single
organization
● Hybrid cloud
– composition of two or more
clouds (private, community or
public)

8. Security and privacy
● Data protection
● Physical Control
● Physical and personnel security
● Availability
● Application security
● Privacy
● Legal issues

9. Issues
● Privacy:
The user data can be accessed by the host company with or
without permission. The service provider may access the
data that is on the cloud at any point in time..
● Compliance:
There are many regulations in places related data and
hosting. User may have to adopt deployment modes that are
expensive.
● Security:
Cloud-based services involve third-party for storage and
security.They may share user’s information with
others.Security presents a real threat to cloud.

10. Issues
● Abuse
– a banking trojan illegally used the popular Amazon
service as a command and control channel that issued
software updates and malicious instructions to PCs that
were infected by the malware
● Open source
– provided the foundation for many cloud computing
implementations
● Open standards
– Some vendors have adopted others' APIs and there are a
number of open standards under development, with a
view to delivering interoperability and portability

11. Research
● Continues to grow
● Increases with the explosion of cloud
computing
● High speed/ performance is heavily researched

12. Cloud Clients
● Google
Chromebook
● Web browsers
● Company specific
applications

13. Importance
● We use clouds everyday
● Used to save huge amounts of
data
● Make maintaining information
easy
● Makes security easy
● Maintainability and
sustainability are better