What is cloud security?
A complete explanation from the list of threats to countermeasures!
Cloud security is something to consider when using cloud services, such as SaaS (Software as a Service) such as Microsoft 365 and Google Workspaces, and IaaS (Infrastructure as a Service) such as AWS (Amazon Web Service). It refers to risks and threats that must be taken, and countermeasures against them.
In today's world, where various risks and threats such as cyber-attacks, data leaks, and service interruptions are increasing, cloud security measures are becoming increasingly important.
However, many people may be wondering how to implement appropriate security measures.
Therefore, in this article, we will introduce information such as the basics of cloud security, differences from traditional security, a list of risks, advantages and disadvantages, countermeasures, precautions, frameworks, etc.
If you are concerned about cloud security, please read this.

What is cloud security?
Cloud security refers to the risks, threats, and countermeasures that must be considered when using cloud services such as SaaS and IaaS.
As we move from physical data centers to cloud-based resources, security measures are also evolving.

Background of the need for cloud security
With the proliferation of cloud services, businesses are enjoying increased flexibility and scalability.
However, this has also increased the risk of unauthorized data access and cyberattacks.
Cloud security is essential because traditional security measures cannot address the threats unique to cloud environments.


Differences from traditional security
The main difference between cloud security and traditional security is in its scope and management method.
Traditional security measures focus on physical data centers, on-premises servers, and networks.
Cloud security, on the other hand, focuses on protecting services provided over the Internet and data on cloud services.
Cloud security risks and threats list
Next, we will introduce nine typical risks and threats to cloud security.

1. data leak
Data breaches in the cloud occur through unauthorized access by external attackers or intentional or accidental disclosure of information by insiders.
Such breaches mean the exposure of sensitive information such as customer information, financial data, and intellectual property, which can result in reputational damage, legal liability, and financial loss for companies.
Important countermeasures include strengthening data protection, strictly managing access rights, and raising employee security awareness.

2. Account takeover
Account takeover is an act in which an attacker steals usernames and passwords and accesses cloud services by impersonating a legitimate user.
This risk often stems from phishing attacks, password reuse, and poor security measures, which can result in data theft and manipulation.
Implementing strong authentication systems, using two-factor authentication, and regularly changing passwords are effective preventive measures.

3. Unauthorized access to management interfaces
Unauthorized access to a cloud service's management interface poses a risk for attackers to gain control over cloud resources, steal data, or destroy systems.
It is like an account takeover, but more serious because administrators have more privileges.
This also requires preventive measures such as strengthening the authentication system and monitoring access logs.

4. Denial of Service Attack (DoS/DDoS)
Denial of Service (DoS) and Distributed Denial of Service (DDoS) attacks are attacks that flood a cloud service with requests, overloading the system and making the service unavailable to legitimate users.
These attacks can be mitigated by monitoring traffic, filtering it, and putting appropriate security measures in place.

5. System resource exhaustion attack
This is an attack that disrupts normal service provision by intentionally exhausting resources on the cloud. This attack can exhaust cloud computing resources and halt legitimate processes.
Monitoring resource usage and setting appropriate limits are effective countermeasures.

6. Advanced Persistent Threat (APT)
Advanced persistent threats (APTs) are targeted attacks that hide on an organization's network for a long period with a specific purpose and steal sensitive information.
APT attackers introduce malware through email attachments and links, gradually gaining power within the network.
To prevent this, continuous monitoring, intrusion detection systems, and employee training are important.

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