The new letter ordering, what’s called a permutation, is the encrypted message.

新的字母顺序，即所谓的排列，是加密的消息。

After Rognvald's death several years later, people realized the letter ordering the attack might have been forged.

几年后 Rognvald 去世后，人们意识到下令袭击的信件可能是伪造的。

After Rognvald’s death several years later, people realized the letter ordering the attack might have been forged.

几年后 Rognvald 去世后，人们意识到下令袭击的信件可能是伪造的。