フリー問題

問題文

A team uses a messaging application that encrypts messages between the two ends. Each phone also copies its chat history into the personal cloud account of its owner. Which statement about that combination is correct?

選択肢

1. The copy in a personal cloud account is protected only by the credentials of that account, so the history becomes readable to anyone who can open that profile, and the promise of encryption between the two ends covers the container and not a cache that is kept independently.
2. The copy in a personal cloud account is protected only by the certificate of that account, so the history becomes readable to anyone who can open that keyboard, and the promise of encryption between the two ends covers the container and not a cache that is kept independently.
3. The copy in a personal cloud account is protected only by the certificate of that account, so the history becomes readable to anyone who can open that keyboard, and the promise of encryption between the two ends covers the transfer and not a copy that is kept independently.
4. The copy in a personal cloud account is protected only by the credentials of that account, so the history becomes readable to anyone who can open that profile, and the promise of encryption between the two ends covers the transfer and not a copy that is kept independently.