Enabling an external operating system to access encrypted data units of a data storage system

A computerized system (100), comprising:

• a computer (10), with a data storage system (11) that comprises:
• a partition (122);
• and
• first encrypted data units that comprise partition table data of said data storage system, and
• an external device (20), to which said computer (10) is connectable, said external device comprising:
• a boot loader for an external OS;
• and
• partitioning information capturing an expected location of said partition in the data storage system,
• and wherein,
• the computerized system further comprises second encrypted data units that comprise reference partition table data for said data storage system, where said second encrypted data units are available from said data storage system or said external device.

A user trusted device, comprising:

• a boot loader configured for allowing to boot a computer therefrom;
• partitioning information capturing an expected location of a partition of a the data storage system of said computer;
• and
• preferably, second encrypted data units that comprise reference partition table data for said data storage system, wherein said second encrypted data match first encrypted data units stored on said data storage system.

A computer program product for allowing an operating system, or OS, to access encrypted data units of a data storage system of a computerized system, the computer program product comprising a computer-readable storage medium having computer-readable program code embodied therewith, the computer-readable program code configured to implement a method comprising:

• upon connection (S21) of said external device (20) to the computer, instructing to boot (S23) the computer (10) from said boot loader (24);
• and
• during or after booting of the computer:
• comparing (S25) the first (120) and second encrypted data units (220);
• and if (S27) the first and second encrypted data units match, allow (S28) the external OS (112) to access, based on the partitioning information (22) stored on the external device, one or more data units (14) of said partition (122) on the data storage system (11).