セキュリティサービスエッジ(SSE)とは?

How Does SSE Work?

SSE works to protect data, detect threats, and control environment access. It integrates with existing security and cloud services, using cloud-native technologies to offer real-time visibility and control over user activities and data flows.

• Data Protection: SSE employs advanced security mechanisms like encryption, data loss prevention (DLP), and secure access controls to safeguard sensitive information both in transit and at rest.
• Threat Detection: SSE enables rapid response to incidents through use of real-time threat detection, powered by machine learning and artificial intelligence (AI), to identify anomalies and potential threats.
• Access Control: SSE enforces granular access controls based on user identity, device posture, and contextual factors, using a zero trust approach to minimize the attack surface.

The cloud-native technologies that SSE uses allow for scalability, provide consistent protection across various environments, and offer the flexibility to adapt.

Security Service Edgeの主なコンポーネントは何ですか?

セキュリティサービスエッジ は、ネットワークセキュリティを単一のクラウドベースのソリューションに統合するように設計されています。 SSE の主なコンポーネントには、次のものがあります。

• ゼロトラストネットワークアクセス(ZTNA): ZTNAは、仮想プライベートネットワーク(VPN)に代わる優れた選択肢を提供し、企業リソースへの安全なリモートアクセスを実現します。 ZTNAにより、組織はオンプレミスまたはクラウドに存在する企業アプリケーションへのリモートアクセスのために、きめ細かなアプリ内ゼロトラストセキュリティを実装できます(例: 内部Webアプリ、Wiki、データベース、リモートデスクトップとサーバー、SSH端末、クラウド本番環境)。
• セキュアWebゲートウェイ（SWG）: SWGは、フィッシングサイト、マルウェアやランサムウェアの感染ポイント、コマンド&コントロール(C2)ボットクライアントなど、インターネットやWebベースの脅威から従業員を保護するように設計されています。 SWGは、Webトラフィックを監視およびフィルタリングして、企業のセキュリティポリシーを適用し、既知の不正なサイトへのアクセスをブロックし、悪意のあるファイルがユーザーのシステムに到達するのをブロックします。 SWGの主な機能は、アクセス制御、データ保護、脅威対策です。
• サービスとしてのファイアウォール（FWaaS）: ファイアウォールは、企業のネットワークセキュリティポリシーの基礎であり、組織がネットワークアクセスを制限し、悪意のあるファイルがネットワークに侵入するのをブロックできるようにします。 FWaaS製品は、サービスベースのモデルでファイアウォール機能を提供し、アプライアンスベースのソリューションよりも高い柔軟性とスケーラビリティを提供します。 SSEの文脈では、FWaaSとは、クラウドベースのネットワークセキュリティを使用してブランチオフィス、データセンター、リモートサイトを保護することを指します。 FWaaSはSD-WANソリューションと統合し、多数のサイトやブランチオフィスに一貫したセキュリティを自動的に適用します。
• Cloud Access Security Broker（CASB）: 企業がさまざまなSaaS(Software as a Service)アプリケーションへの依存度が高まるにつれ、企業のセキュリティポリシーとアクセス制御をクラウドサービス全体に適用できるソリューションが必要とされています。 CASBソリューションは、認証、シングルサインオン、認可、暗号化、監視、脅威対策などの機能により、SaaSアプリケーションでアクセスされるデータの管理と保護を支援します。
• Identity and Access Management (IAM): IAM governs user identities and access to resources, enabling organizations to manage user identities, enforce authentication protocols, and implement role-based access controls.
• Data Loss Prevention: DLP mechanisms protect sensitive information from unauthorized access and exfiltration, monitoring data in motion, at rest, and in use, and applying policies to prevent data leaks.

SSE vs. SASE: What’s The Difference?

While both SSE and SASE aim to secure cloud environments and remote workforces, they serve distinct purposes.

SSEの

SSEの primarily focuses on delivering essential security services, such as:

• Data protection
• Threat detection
• アクセス制御

SSE does not address networking aspects. It prioritizes security-first strategies, making it well-suited for organizations handling sensitive data or that otherwise require advanced data protection and threat detection capabilities, facilitating regulatory compliance.

SASE

SASE combines the security services from SSE with:

• Wide-area networking (WAN) capabilities
• Zero Trust Network Access (ZTNA) principles

This provides a comprehensive solution for secure access to applications and data. SASE offers similar capabilities, it is ideally suited for organizations with a distributed workforce accessing cloud applications.

It optimizes both security and network performance, ensuring seamless connectivity and protection.

どちらを選ぶべきですか?

SSE focuses on security services, while SASE integrates security and networking. Each framework caters to different organizational needs and use cases:

• Security Service Edge: Ideal for organizations seeking to secure access to cloud resources and SaaS applications, and to implement a zero-trust approach for cloud-based assets.
• Secure Access Service Edge: Intended for organizations that require secure access to both cloud resources and on-premises networks. SASE is optimized for network performance, such as low-latency connectivity for real-time applications.

Benefits of Security Service Edge

Implementing Security Service Edge (SSE) offers advantages that enhance an organization’s security posture while addressing the challenges of cloud environments.

• Enhanced Visibility: SSE provides improved visibility into user activities and data flows across cloud environments, enabling organizations to identify potential security risks and enforce security policies.
• Improved Threat Detection: SSE solutions leverage real-time analytics and machine learning algorithms to enhance threat detection capabilities, allowing security teams to rapidly respond to threats and mitigate risks before they escalate.
• Cost-Effectiveness and Scalability: SSE solutions are often more cost-effective than traditional security measures, reducing costs. They also offer scalability, allowing organizations to easily accommodate increased user loads and changing security requirements without extensive infrastructure changes.

The enhanced visibility, control, threat detection capabilities, and scalability of SSE make it an attractive option for organizations seeking to strengthen their security.

SSE and Cyber Threats

SSE provides a framework for combating evolving cyber threats, particularly effective in mitigating threats, such as:

• ランサムウェア
• フィッシング攻撃

It implements strict access controls and data protection measures, and employs advanced threat detection mechanisms to identify and block malicious links and attachments.

Machine Learning and AI

Machine learning and AI are central to enhancing threat intelligence within SSE.

These technologies enable SSE solutions to analyze vast amounts of data in real-time, identifying patterns and anomalies that may indicate potential threats. This approach allows for faster threat detection and response.

Continuous Monitoring & Adaptive Security

SSE incorporates continuous monitoring and adaptive security measures. This enables organizations to maintain real-time visibility into their security posture, quickly identify and respond to potential threats, and adjust their security policies and controls based on the ever-changing threat environment.

These capabilities position SSE as a critical component in the ongoing fight against evolving cyber threats.

3 Best Practices

Implementing Security Service Edge effectively requires adherence to best practices that enhance security and ensure the solution aligns with organizational goals.

1. Zero Trust Architecture: Adopting a zero trust architecture is fundamental to the success of SSE. This approach requires continuous authentication and authorization for every access request, ensuring that users have the minimum necessary permissions to perform their tasks.
2. Regular Security Assessments: Conduct regular security assessments to evaluate the effectiveness of the SSE implementation and identify vulnerabilities. Regular updates to SSE configurations are essential to adapt to evolving threats and changing business needs.
3. User Education Programs: Implement comprehensive user education and awareness programs to inform employees about security best practices and the importance of adhering to security policies. Regular training sessions and updates can help reinforce these concepts and keep security top of mind for all employees.

Effective adoption of these best practices enables organizations to significantly bolster their security posture, ultimately ensuring that the implementation is highly effective at mitigating risks.