| 摘要 |
<p>The present invention is notably directed to a user portable device (10), preferably a secure tamper-proof device, comprising: a connection interface (12) enabling connection (S2) with a computer (101); a persistent memory (14); and a bootloader (16) stored on said persistent memory (14), preferably on a secure memory (141) of the device, wherein the bootloader (16): is detectable (S3) by a firmware (122) of the computer (101) upon connection (S2) of the device (10) with said computer (101) via said connection interface; and comprises instructions for said firmware (122) to load (S4) the bootloader (16) into a memory (121) of the computer (101) for subsequent execution (S5); and to interact with the firmware, upon execution at the computer (101), to: determine, in a physical storage medium (120) of said computer (101) storing a first host operating system (111-1) and a second host operating system (111-2) respectively on a first portion (120-1) and a second portion (120-2) thereof, said second portion (120-2), from partition information (111-1p) of said physical storage medium, which partition information acknowledges the first host operating system but does not acknowledge the second host operating system; locate a part (BI) of the second host operating system (111-2) in the second portion (120-2); and execute said part (BI), whereby only the second one of the host operating systems can boot (S6–S8) from the user portable device (10). The present invention is further directed to related systems and methods.</p> |
