picoCTF2019 Mr-Worldwide [Cryptography]
A musician left us a message. What's it mean?
与えられた暗号文は以下である。
picoCTF{(35.028309, 135.753082)(46.469391, 30.740883)(39.758949, -84.191605)(41.015137, 28.979530)(24.466667, 54.366669)(3.140853, 101.693207)_(9.005401, 38.763611)(-3.989038, -79.203560)(52.377956, 4.897070)(41.085651, -73.858467)(57.790001, -152.407227)(31.205753, 29.924526)}
何となく経度・緯度っぽいので、Google mapで表示された地名をピックアップしていく。
35.028309, 135.753082 Nakanocho, Kamigyo Ward, Kyoto
46.469391, 30.740883 Odesa, Odessa Oblast, Ukraine, 65000
39.758949, -84.191605 Dayton, OH 45402, United States
41.015137, 28.979530 European Side, Hoca Paşa, 34110 Fatih/İstanbul, Turkey
24.466667, 54.366669 Hazza Bin Zayed the First St - Abu Dhabi - United Arab Emirates
3.140853, 101.693207 50480 Kuala Lumpur, Federal Territory of Kuala Lumpur, Malaysia
9.005401, 38.763611 Kirkos, Addis Ababa, Ethiopia
-3.989038, -79.203560 Av Nueva Loja, Loja, Ecuador
52.377956, 4.897070 Martelaarsgracht 5, 1012 TN Amsterdam, Netherlands
41.085651, -73.858467 Sleepy Hollow, NY 10591, United States
57.790001, -152.407227 1 Chadrick Cove, Kodiak, AK 99615, United States
31.205753, 29.924526 Faculty Of Engineering, Al Azaritah WA Ash Shatebi, Qism Bab Sharqi, Alexandria Governorate, Egypt国名ではなく、都市名を並べるとフラグとなった。
答え：picoCTF{KODIAK_ALASKA}