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Differentiate unconditionally secured and computationally securedĪn Encryption algorithm is unconditionally secured means, the condition is if the cipher text generated by the encryption scheme doesn’t contain enough information to determine corresponding plain text.Įncryption is computationally secured means,ġ.
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Example: Encryption algorithm, Digital signature, Authentication protocols.Ĩ. It is process that is designed to detect prevent, recover from a security attack. Processes the input one block of elements at a time producing an output block for each input block. Stream cipher: Processes the input stream continuously and producing one element at a time. Compare stream cipher with block cipher with example. It is a process of attempting to discover the key or plain text or both.Ħ. It is a form of cryptosystem in which encryption and decryption.Symmetric Asymmetric It is a form of crypto-system in which encryption and decryption performed using the same key.Differentiate symmetric and asymmetric encryption? Non repudiation: This service helps to prove that the person who denies the transaction is true or false.Ĥ. Integrity: Service that ensures that only authorized person able to modify the message. E.g.: Fabrication, Modification, and Interruption Eg: InterceptionĪctive attack: It involves the modification of data stream or creation of false data stream. Passive attack: Monitoring the message during transmission. Explain active and passive attack with example? Specify the four categories of security threads?Ģ. Download link for CSE 7th SEM CS6701 Cryptography & Network Security Short answers, Question Bank is listed down for students to make perfect utilization and score maximum marks with our study materials.ġ. Anna University Regulation 2013 Computer Science & Engineering (CSE) CS6701 CNS 2marks & 16marks for all 5 units are provided below.
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