Decipher the clues, escape the prison!

Question

Decipher the clues, escape the prison!

The guard at the prison, where you have been locked up for misuse of USB ports, has given you one chance to escape, by typing in a certain word. A keyboard is put down in front of you, and you are shown a sheet that reads as follows:

You never know where the key will be hidden, it could be right between your eyes...
[20][1E][23][1F]

THE WORD

Much like a Vigenere cipher, yet the letters are numbers!

[1L][1H][2M][16][13][08][06][17][15][18][10]

What should you type in?

HINT 1

The part about 'right between your eyes' applies to the word only, not the text in the first code block.

HINT 2

The guard is quite nice and has given you, being a USB expert, nothing too hard.

HINT 3

Surely someone knows a cipher like a Vigenere cipher but with numbers as letters.

Answer 1

I think the word is

SPECTRUM

The first block is

just a hint that the encrypted text is base 16.

Since I am a USB expert,

I know how to read in base 16. And when I convert the legal blocks in [1L][1H][2M][16][13][08][06][17][15][18][10] from base 16 to base 10, it results as 22 19 8 6 23 21 24 16. When we convert these decimal numbers to letters in English alphabet, we get WTIGXVYQ.

Then, by using

Caesar cipher, I shift the letters by 22 to get SPECTRUM