Machine identity is the foundation of trust between the countless non-human actors now powering modern IT – from servers, containers, APIs and IoT devices to AI agents and automated workflows. This tag explores how cryptographic keys, certificates and credentials function as “digital passports” for machines, and why securing them is just as critical as protecting human usernames and passwords.

Stories here track the rapid growth of machine and AI identities, the shift to short-lived TLS certificates, and the mounting risks from exposed keys, code-signing abuse and long-lived credentials. You’ll find research on dark web certificate marketplaces, real-world outages caused by legacy PKI, and reports revealing how often machine identities are unmanaged, over-privileged or completely invisible to security teams.

The coverage highlights how vendors, standards bodies and enterprises are responding: from certificate lifecycle management and machine identity control planes to new tools for governing AI agents at runtime. It examines partnerships, product launches and market trends around PKI, HSMs, service mesh security, Kubernetes, cloud-native environments and identity-first security architectures where machines now outnumber humans.

For security leaders, architects and DevOps teams, this tag offers a concise way to stay ahead of emerging threats and best practices in machine identity management. Reading these articles will help you understand where your organisation is most exposed, how automation and policy can prevent outages and breaches, and why identity – human and machine – is fast becoming the ultimate control point in an AI-driven world.