cryptogram telephone

例句：

1. 1. The senderused a cryptogram to hide the messagefrom eavesdroppers.
   发送者使用了一个密码电报来隐藏消息，以防窃听者。
2. 2. The government has been usingcryptograms to secure sensitive information.
   政府一直在使用密码电文来保护敏感信息。
3. 3. The cryptogram was deciphered by experts who were able to crackthe code.
   专家们破解了密码，解密了密文。