With the popularization of hybrid office, remote operation, multi-branch interconnection and cloud-based services, the traditional perimeter security architecture that “trusts internal network and distrusts external network” is no longer applicable. Enterprises face severe risks such as public network exposure, disordered remote access, excessive static permissions, internal lateral penetration and unauthorized data leakage. Replacing traditional boundary defense, the zero trust security architecture follows the core principles of “never trust, always verify, dynamic authorization and continuous evaluation”. It builds an identity-centered fine-grained access control system to adapt to enterprise digitalization, remote office and cloud transformation, fully meeting the compliance requirements of Cybersecurity Classified Protection 2.0, ISO27001 and IPO internal control audit.
1. Overall Solution Architecture
The zero trust solution adopts a four-layer architecture including trusted identity foundation, dynamic policy control, full-domain continuous verification and intelligent risk response. It transforms traditional boundary protection into endogenous security centered on identity, covering headquarters office, remote branches, home office, outsourced operation and cloud system access scenarios.
1. Trusted identity foundation: Build unified account systems for employees, outsourced personnel and visitors. Support MFA multi-factor authentication and device fingerprint binding to prevent weak passwords, shared accounts and unauthorized login.
2. Terminal compliance verification: Automatically detect terminal patch status, virus risks and security policy compliance before access. Non-compliant terminals are prohibited from accessing core systems to block risky terminal access.
3. Dynamic permission policy: Implement the least privilege principle with one-person-one-authority and real-time dynamic adjustment based on login location, time, device status and user behavior to avoid over-authorization risks.
4. Continuous audit and response: Record full access tracks and operation behaviors to establish user behavior baseline. Real-time alarm and automatic block against abnormal login, bulk access and data exfiltration to achieve visualized, traceable and disposabl security management.
2. Core Security Capabilities
1. Invisible business access without port exposure: Adopt SDP software-defined perimeter to hide internal services from public network, effectively preventing port scanning, brute-force cracking, DDoS and vulnerability exploitation attacks.
2. Fine-grained least privilege control: Strictly isolate permissions for office systems, financial platforms, R&D resources, databases and server operations. Users can only access necessary business resources to avoid lateral penetration even if accounts are compromised.
3. Full-link encrypted transmission: Replace traditional weak-encryption VPN with high-strength encrypted tunnels to prevent eavesdropping, data hijacking and man-in-the-middle attacks for cross-branch and cross-border transmission.
4. Full lifecycle management for personnel and devices: Support automatic account creation, permission recovery and resigned user cleanup, realizing continuous compliance monitoring for remote and external terminals.
5. Closed-loop compliance audit: Completely retain login, access and operation logs to meet long-term audit traceability requirements of classified protection, ISO27001 and IPO internal control.
3. Typical Application Scenarios
1. Enterprise hybrid office scenarios: Enable secure remote access for home office and field staff without public network exposure, balancing accessibility and data security.
2. Multi-branch interconnection scenarios: Unify security policies and baseline management between headquarters and chain stores to reduce branch IT construction and O&M costs.
3. Third-party outsourcing operation scenarios: Grant time-limited minimum privileges to external vendors with automatic permission recycling to prevent core data leakage caused by third-party access.
4. R&D and confidential business scenarios: Strictly isolate access to code libraries, drawings and financial data, prohibiting unauthorized access and bulk export to protect core intellectual property.
5. Cloud migration and hybrid cloud access scenarios: Unified access control for local data centers, private clouds and public clouds to solve disordered cloud access and missing audit problems.
4. Solution Value
The zero trust solution completely upgrades traditional perimeter security mechanisms and solves security pain points brought by borderless office, cloud business and remote operation. In terms of security, it realizes invisible service protection, dynamic permission control, trusted terminal admission and full behavior audit to prevent intrusion, over-access and data leakage fundamentally. In terms of O&M, it unifies the management of full-network access permissions and terminal status to reduce multi-branch and multi-cloud O&M pressure. In terms of compliance, it fully meets the standards of network classified protection, ISO27001 and IPO internal control audit. It builds a lightweight, high-security and scalable new-generation enterprise security access system to support long-term digital transformation and multi-site collaborative development.