Square CTFのCrypt 50ptの問題として、以下の暗号文が出題。 The androids’ plans for domination include securing ancient artifacts relating to the animal world to be used for nefarious means. We managed to infiltrate one of their digsites and …

gemコマンドで初めてツールをインストールしようとしたところ、以下のエラーが発生。 #gem install zsteg Building native extensions. This could take a while...ERROR: Error installing zsteg: ERROR: Failed to build gem native extension. current di…