When in Rome10 points Solved 299 times Cryptography Zachary TaylorI heard of a cipher named after Julius Caesar, and I want you to try it out! Try decoding this message:
Nvctfdv kf jTKW! Nv yfgv pfl veafp kyv gifscvdj nv yrmv nizkkve wfi kyv wzijk hlrikvi fw 2016. Yviv zj pfli wzijk fw (yfgvwlccp) drep wcrxj! jtkw{ny3e_1e_tkw_u0_r5_tkw3i5_u0}
「sctf{」をアルファベットで17文字分ずらすと「jtkw{」になります。したがって、上のメッセージのアルファベットのみを17文字分戻してみます。
welcome to sctf! we hope you enjoy the problems we have written for the first quarter of 2016. here is your first of (hopefully) many flags! sctf{wh3n_1n_ctf_d0_a5_ctf3r5_d0}
フラグは、
sctf{wh3n_1n_ctf_d0_a5_ctf3r5_d0}
です。
