The host computer securitization architecture, which comprises: an offline source server, an offline provisioning server configured to connect with a portable mobile securitization server via a wired communication, an administration server configured to monitor and interact with at least one portable mobile securitization server, at least one portable mobile securitization server configured to connect via a wired communication to a host computer, said portable mobile securitization server comprising: a connector to mechanically connect and establish a removable wired communication between the mobile server and the host computer, a first wired bidirectional communicator with the host computer, a second of bidirectional communicator with a data storage peripheral or a data network and a unit securing the communication between the host computer and the data storage mobile server or the data network, this communication being established between the first and the second communicator, a blockchain comprising a block identifying each source-code, provisioning, administration and portable mobile securitization server.