XOR it out 250 pts · Medium

The flag was XORed with a single repeating byte and written out as hex:

4e48594f515943444d464f7548535e4f7552455857

There are only 256 keys. Try them all, or reason about what the first four plaintext bytes must be.

Hint

You know the plaintext starts with `dbse`. XOR is its own inverse.