Microsoft Tightens Digital Defenses with Sweeping Security Overhaul

Microsoft unveiled detailed security reforms Monday, five months after CEO Satya Nadella pledged to prioritize cybersecurity following major breaches. The 25-page Secure Future Initiative report [PDF] outlines technical and governance changes addressing criticisms in an April 2024 Cyber Safety Review Board report that deemed Microsoft's security culture "inadequate." Microsoft said it implemented significant security upgrades to its Entra ID and Microsoft Account systems, introducing Azure-managed hardware security modules for access token signing keys. The company has also purged 5.75 million inactive tenants to minimize potential attack vectors and adopted a new testing system with secure defaults to prevent legacy-related security issues. Concurrently, Microsoft has enhanced its network tracking capabilities, now monitoring over 99 percent of its physical network through a centralized inventory system, which aids in firmware compliance and logging. Internal security measures have been tightened, with engineering teams facing stricter access controls. Personal access tokens are now limited to seven days, SSH access has been disabled for internal engineering repositories, and access to critical engineering systems has been restricted to fewer groups. Additionally, Microsoft has extended its audit log retention period to a minimum of two years, bolstering its ability to investigate and respond to potential security incidents.

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