Intended for pupils of forms 1-12, adults, senior citizen, and soldiers

Keeping a secret is the key to victory. Ancient military leader Gaius Julius Caesar knew this fact, so do contemporary generals. When did the mysterious history of encryption begin, and how were wooden sticks wrapped in a special leather stripe eventually replaced by sophisticated encryption machines that could be understood only by the brightest minds of states? Uncover these secrets and try to decipher the messages sent to you by Lithuanian soldiers. Hurry up as the enemy is not slumbering!