You will have to decode a secret word from this image:
And then use a cipher to combine the word and decode the encoded message below Again, good luck!
Encoded Message: Zeyd Iuhpchhpp
Decode a secret word
Binary 01001000 01100101 01101100 01101100 01101111 equals 'Hello' in ASCII table (72 101 108 108 111)
Use that word to decode the message
Using 'Hello' as a key use Vigenere cipher to decode the message: Sans Undertale
Partial answer:
The image is binary (if you replace all of the blacks with 0 and whites with 1)
And
This translates into hello