Definition :

    The Multi-layer zero trust is an IT security strategy that involves applying the principle of zero trust at different levels of the security architecture to enhance the protection of systems and data.

    The zero-trust principle is based on the idea that users, devices and applications should not be considered trusted by default, and that they should be authorised and verified at every stage of their interaction with the network and resources.

    In a multi-layer zero trust environment, the security strategy is applied at several levels, including :

• At user level: Users must be authorised to access resources according to their role and job, their context and their behaviour.
• Device level: Devices must be checked to ensure that they are secure and comply with the company's security policies.
• At application level: Applications must be checked to ensure that they are reliable and do not pose a security threat.
• At network level: Network traffic must be monitored to detect threats and malicious behaviour.

    By applying the 'zero-trust' principle at these different levels, organisations can strengthen their security posture and reduce the risk of attacks and data breaches.