Method for securing data and/or applications in a dynamic cloud computing architecture comprising: a set of virtual servers identified by server identifiers, with each virtual server associated with one or more virtual memory discs, with each virtual memory disc being materialised by one or more memory spaces in one or more physical memory discs, an interface allowing a remote user to access, via a network of the Internet type, one or more virtual servers which are dedicated to said user from the set of virtual servers by means of an access key which is specific to the user and/or to each virtual server, and to administer said dedicated virtual servers, interface components for creating and managing the set of virtual servers, characterised in that it comprises the following steps according to which: a security module is provided, said security module being administered by the user of the virtual server or servers which are dedicated to said user by means of a security console; said security module is provided with one or more security policies able to be applied to the data and/or applications managed by the virtual servers dedicated to said user, said security policies forming security rules defining the confidentiality, the integrity and/or the availability of said data and/or applications; said security module is provided with said access key which is specific to the user and/or to each dedicated virtual server, for accessing the dedicated virtual servers of the user; the security policies intended to be applied to the data and/or applications managed by the virtual servers dedicated to the user are defined by means of the security console; the security module accesses said dedicated virtual servers of the user by means of the specific access key; and the dedicated virtual servers apply the security policies, which have been provided to said security module and defined, to the data and/or to the applications that they manage. a set of virtual servers identified by server identifiers, with each virtual server associated with one or more virtual memory discs, with each virtual memory disc being materialised by one or more memory spaces in one or more physical memory discs, an interface allowing a remote user to access, via a network of the Internet type, one or more virtual servers which are dedicated to said user from the set of virtual servers by means of an access key which is specific to the user and/or to each virtual server, and to administer said dedicated virtual servers, interface components for creating and managing the set of virtual servers, a security module is provided, said security module being administered by the user of the virtual server or servers which are dedicated to said user by means of a security console; said security module is provided with one or more security policies able to be applied to the data and/or applications managed by the virtual servers dedicated to said user, said security policies forming security rules defining the confidentiality, the integrity and/or the availability of said data and/or applications; said security module is provided with said access key which is specific to the user and/or to each dedicated virtual server, for accessing the dedicated virtual servers of the user; the security policies intended to be applied to the data and/or applications managed by the virtual servers dedicated to the user are defined by means of the security console; the security module accesses said dedicated virtual servers of the user by means of the specific access key; and the dedicated virtual servers apply the security policies, which have been provided to said security module and defined, to the data and/or to the applications that they manage.