Relier Pairs Secret WritingVersion en ligne ........... par Tea Cher 1 Ancient 古老的 2 Alum 明矾 3 Steganography 隐写术 4 Cryptography 密码学: 5 Cunning 狡猾 6 Secret agent 密探 7 Substitution 代换 8 Vital information 重要信息 9 Transposition 换位 10 Scalp 头皮 The practice of concealing messages or information within other non-secret data. Critical or essential information that is of utmost importance. Clever, sly, or crafty in achieving one's goals or solving problems. The act of changing the position or order of something. A chemical compound used for various purposes, including as a mordant in dyeing and as an ingredient in some inks. The practice or study of techniques for secure communication in the presence of third parties. A person who works covertly to gather information or perform espionage activities. The skin covering the top of the head. Belonging to a time long past, typically referring to a period in history. The act of replacing one thing with another.