Explain why it is impractical to use an ideal block cipher for real-world encryption. can you make this simple please? Thanks
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Explain why it is impractical to use an ideal block cipher for real-world encryption.
can you make this simple please? Thanks
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- Using public-key cryptography or another kind of asymmetric encryption is a good idea. Proof of this may be seen in the use of public keys in cryptography.Part 1: Please answer the following questions about the fundamental of cryptography. Each question has only one correct answer. 1, Which description about block ciphers is NOT correct? Block ciphers encrypt the message block by block. A block cipher with a small block is vulnerable to the codebook attack. The encryption and decryption algorithms in block ciphers use the same secret key. The key length for block cipher should be very short to defend against the exhaustive key search attacks. 2, If the key length of a block cipher is 64 bits, what is the size of the key space? Hint: The key space consists of all possible keys. 64 264 232 2128 3, Modern block ciphers combine substitution S and permutation P operations to improve security. Based on the security rule, the cipher should not use consecutive substitutions or consecutive permutations. In the following combinations, which one violates the above security rule? ?1?1?2?2 B. ?1?1?2?2 C. ?1?1?2?2 4, Which…It is strongly suggested that you make use of public-key cryptography as well as any other kind of asymmetric encryption. The use of public keys within the realm of cryptography is proof of this fact.
- In the context of cryptography, what are the differences between a cipher that uses symmetric keys and a cipher that uses asymmetric keys? The industry standard for the size of the RSA public key is much bigger than the size of a symmetric key? Why? Are ciphers based on symmetric keys not s secure as RSA?Using the Vigenère cipher, encrypt the word “explanation” using the key leg. Hint: You may use a Vigenère Table (shown below) to perform the polyalphabetic encryption process. Remember, a key is needed that is as long as the message.A government department decides it needs to use encryption to protect communication between itself and its international counterparts. At a meeting with its counterparts, it is decided to develop a proprietary cryptographic algorithm for this purpose. Is this decision justifiable? What risks are being taken?
- Create your own Cryptography Method/Ciphering Technique. show how to encrypt and decrypt data using your method. To give you an idea here are some of example of ciphering techniques known: Vigenère Cipher Vigenere Cipher 1 Caesar’s Cipher Periodic Transposition Cipher Rail – Fence CipherIt is best to use public-key cryptography or another type of asymmetric encryption. This is shown by the fact that public keys are used in cryptography.Is there a distinction between symmetric and asymmetric key cryptography and how they are used?