要学习的密码

ciphered telephony───加密电话

a cross to bear───要承受的十字架

cipherer───密码器

cipherers───密码器

ciphertext───n.密文

ciphertexts───n.密文

to learn───学习

• ciphers with keys
• ciphers and codes
• ciphers using numbers
• ciphers to learn
• ciphers means