Alice wants to use a public stream cipher system to send a secret message. The system...

  

Transcribed Image Text:

Alice wants to use a public stream cipher system to send a secret message. The system always uses the same key stream for any message sent. This was the cipher text message that Alice sent: 10110 Oscar sent his own plain message below using the same system: 00000 This is the resulting cipher text for Oscar's plain text: 00110 What are the keystream bits that Alice used? What plain text did Alice send? Alice wants to use a public stream cipher system to send a secret message. The system always uses the same key stream for any message sent. This was the cipher text message that Alice sent: 10110 Oscar sent his own plain message below using the same system: 00000 This is the resulting cipher text for Oscar's plain text: 00110 What are the keystream bits that Alice used? What plain text did Alice send?