Method for securing an automated system

An automated system including a configuration subsystem and a production subsystem,

• wherein the configuration subsystem is separate from the production subsystem that comprises a plurality of components, a gatekeeper and an entity secured with a first secret value,
• wherein the configuration subsystem comprises a generator including instructions that, when executed by a first processor, cause said generator to select a secret sharing scheme, to generate, from an input parameter different from said first secret value, a set of secret shares using the secret sharing scheme and to uniquely assign and securely send a secret share extracted from the set to each of said components,
• wherein the gatekeeper includes instructions that, when executed by a second processor, cause said gatekeeper to get a subset of the secret shares from said components, to construct a second secret value from said subset using the secret sharing scheme, to compute the first secret value by applying a preset function to the second secret value and to unlock access to the entity using the first secret value.