�ݺ�ߣ

What is Cloud Computing?
Various forms of Cloud Computing
Benefits of Cloud computing
Why we need cloud security?
 Cloud Security Concerns
 Cloud Security Threats
 Cloud Security Mechanisms

What is Cloud Computing ?
Cloud computing is a type of
computing that relies on sharing computing
resources rather than having local servers or
personal devices to handle applications .

Types of Cloud Computing
 Public Cloud
 Private Cloud
 Hybrid Cloud

Various Forms of Cloud Computing
 Cloud Computing is some kind of hosted service
Cloud Computing models down into :
 Infrastructure as a Service
 Platform as a Service
 Software as a Service

Various Forms of Cloud Computing

Benefits of Cloud Computing
 Cost (Pay as You Go)
Multi-tenancy
Accessibility
Elasticity
Easily upgraded

Is my data secure
on cloud?
Why we need Cloud security?
Can others access
my confidential
data?
What if an hacker
brings down my app
hosted on cloud?

Cloud Security - Concerns
Multitenancy
Velocity of
Attack
Information
Assurance
Data privacy
and
Ownership

Security Concern - Multitenancy
 Multitenancy is a key security concern in cloud
o For Cloud Clients
 Co-location of multiple VMs in single server and sharing
the same resources increases the attack surface
o For CSPs
 Enforcing uniform security controls and measures is difficult
 Mutual client isolation is key measure against multitenancy
- related concerns

Security Concern – Velocity of Attack
 Security threats amplify and spread quickly in a Cloud –
Known as “Velocity – of – Attack” (VOA) factor
 Cloud infrastructure is comparatively larger
 Similarity in the platforms/components employed by a CSP
increases the speed at which an attack can spread
 Effects of high VOA
Potential loss due to an attack is comparatively higher
It is comparatively difficult to mitigate the spread of the
attack

Security Concern – Information Assurance
and Data Ownership
• Information assurance concern s for Cloud user involve
CIA
Authenticity
Authorized use
• Data ownership concerns for Cloud Clients
In Cloud, Data belonging to client is maintained by a CSP who
has access to the data but is not the legitimate owner of it
Data should be protected using encryption and access control
mechanism

Security Concern – Data Privacy
• Private data may include
 Individual identity of client
 Details of services requested by client
 Proprietary data of client
• A CSP needs to ensure that private data of its client is
protected from unauthorized user
 A CSP needs to deploy data privacy mechanism,
which are compliant with the regional legal
regulations

Cloud Security - Threats
VM Theft Hyper Jacking
Data Leakage
Denial of
Service(DoS)
Attack

Security Threat – VM Theft
• What is VM Theft ?
 A Vulnerability that enables an attacker to copy
or move VM in an unauthorized manner
• Result of inadequate controls on VM files allowing
unauthorized copy or move operations

Security Threat – Hyper Jacking
• What is Hyper Jacking ?
It enables an attacker to install a rogue hypervisor or
Virtual Machine Monitor that can take control of the
underlying server resources.
• An attacker can run unauthorized application on a
guest OS without the OS realizing it
• An attacker could control the interaction between
the VMs and underlying servers
• Regular security measures are ineffective against
hyper jacking

Security Threat – Data Leakage
• Confidential data stored on third party Cloud is Potentially
vulnerable to unauthorized access or manipulation
Attacks on service provider’s control system( for example
password lists) could make all the client s’ data vulnerable
• Side Channel Attacks (SCA) can be used for data leakage
in Cloud
An SCA extracts information by monitoring indirect actives;
for example cache data

Security Threat – Denial of Service
Attacks
• What is DoS attack?
It is an attempt to prevent legitimate user from
accessing a resource or service
• Dos attack might affect software application and
network component
• DoS involves
 Exhausting resources
Exploiting weakness in communication protocols

Cloud Security - Mechanisms
Compute
and Network
Security
Secure Data at
Rest
Identity and
Access
Management
Risk Analysis

Security at Compute Level
• Securing a compute system includes
 Securing physical server
 Securing hypervisor
Security at guest OS level
 Guest OS Hardening
 Security at application level

Securing Data-at -Rest
• Data-at-rest
 Data which is not being transferred over a network
• Encryption of Data-at-rest
 provides confidentiality
Provides integrity services
• Full disk encryption is a key method to encrypt
data-at-rest residing on a disk

Identity Management (IM) in Cloud
• One-time password
 Every new access request requires new password
 A measure against “password compromises”
• Federated Identity Management is provided as a
service on cloud
In it user identities across different organization can
be managed together to enable collaboration on Cloud

Risk Analysis
• Risk refers to the effect of uncertainty on business
objectives
•Risk management is a coordinated activity that direct
and control an organization
Risk Assessment
• Aim to identify potential risks while operating in a Cloud
environment
Should be performed before moving to cloud
Used to determine the actual scope for Cloud adoption

�ݺ�ߣ

Cloud computing

More Related Content

Cloud computing