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1- Give three examples of fairly used shift ciphers and list their drawbacks. 2- Are OTP's a secure way to encrypt data? Explain your answer

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1- Give three examples of fairly used shift ciphers and list their drawbacks. 2- Are OTP's a secure way to encrypt data? Explain your answer 3- Briefly describe how DES works 4- What is the purpose of an S box in DES? 5- Using modern day computers which attacks can break Triple DES. 6- Describe how AES works 7- Explain how AES uses the Feistel Network? 8- Cite three major differences between DES and AES

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