Do you remember something known as QR Code? Simple. Here for you : https://mega.nz/#!eGYlFa5Z!8mbiqg3kosk93qJCP-DBxIilHH2rf7iIVY-kpwyrx-0
Solution:
Using an QR code reader you get c3ludCB2ZiA6IGEwX29icWxfczBldHJnX2RlX3BicXI=
Looks like base64: synt vf : a0_obql_s0etrg_de_pbqr
Looks like caesar… key 10: flag is : n0_body_f0rget_qr_code
Flag: n0_body_f0rget_qr_code