About secure boot

[geole]

Hello
I just set a computer to secure boot mode Since then, I can no longer boot the USB key made by ventoy, the error message is as follows

"Boot stopped: A suitable digital signature was not found. One of the files on the chosen boot device was rejected by the secure boot function "

I tried with the key made in secure boot or not for versions 1.38 and 1.39 Again, I had to use unetbootin to remake installation media!

It's probably one of those files

Code:

a@b:/mnt/EFI/boot$ ls -ls

Code:

total 11334

Code:

1828 -rwxr-xr-x 1 root root 1871872 mars  28 10:43 BOOTAA64.EFI

Code:

954 -rwxr-xr-x 1 root root  975536 mars  28 10:43 BOOTIA32.EFI

Code:

2420 -rwxr-xr-x 1 root root 2478080 mars  28 10:43 BOOTMIPS.EFI

Code:

1264 -rwxr-xr-x 1 root root 1293304 mars  28 10:43 BOOTX64.EFI

Code:

  58 -rwxr-xr-x 1 root root  58488 mars  28 10:43 grubia32.efi

Code:

1088 -rwxr-xr-x 1 root root 1114112 mars  28 10:43 grubia32_real.efi

Code:

  64 -rwxr-xr-x 1 root root  63608 mars  28 10:43 grubx64.efi

Code:

1612 -rwxr-xr-x 1 root root 1650688 mars  28 10:43 grubx64_real.efi

Code:

910 -rwxr-xr-x 1 root root  929864 mars  28 10:43 mmia32.efi

Code:

1136 -rwxr-xr-x 1 root root 1163208 mars  28 10:43 MokManager.efi

Code:

a@b:/mnt/EFI/boot$