0.1 (Unit-1) (a): How intruders can compromise unprotected computers? (b): Consider Caesar cipher to perform encryption on the plaintext ("meet me after the toga party") with key value = 5. (d): By using the Vigener Cipher, perform encryption and decryption. The plaintext is I LIKE CRYPTOGRAPHY, and the keyword is CAESAR.

0.1 (Unit-1) (a): How intruders can compromise unprotected computers? (b): Consider Caesar cipher to perform encryption on the plaintext ("meet me after the toga party") with key value = 5. (d): By using the Vigener Cipher, perform encryption and decryption. The plaintext is I LIKE CRYPTOGRAPHY, and the keyword is CAESAR.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Similar questions

RSA is an exponentiation cipher that is used in public key cryptography. Two entities, A and B would wish to exchange data using RSA algorithm and have chosen two prime numbers p and q such that p = 7 and q = 11. Assume a cryptosystem in which each letter of the alphabet is represented by a number between 00 (A) and 25(Z) and a space is represented by 26. A and B have also agreed to generate cryptographic keys such that the private and public key pair for A is d and e respectively while the private and public key pair for B is f and g respectively. Take the key values as follows: d= 53, e = 17, f = 13 and g = 37. A wants to send the message "MY SON " to B in such a way that BOTH the message's confidentiality and authenticity of the sender are preserved. Explain the requirements on both the sender side and the receiver side that will ensure both the message confidentiality and sender authentication for this communication. Clearly show the computations performed by the sender to…
Consider the following encryption scheme for a block cipher (using the notationfrequently used in class).y1 = ek(x1), y2 = ek(x1 ⊕ x2), y3 = ek(x1 ⊕ x2 ⊕ x3), etc.a. Describe the corresponding decryption scheme.b. Can encryption and/or decryption be run in parallel for this scheme?c. Taking into account that the operation of XOR is cheap, determinewhether or not this scheme improves on ECB mode or not
blockchain is a collection ofrecords (called blocks), where each block links to the previous block using cryptography. Eachblock contains cryptographic hash, timestamp and data relevant to its application. Think ofit as a distributed ledger where instead of information being stored in a database it is storedon the blockchain. Some examples of solutions that use a blockchain at its core are:1. Cryptocurrencies (however, for this project you may NOT do a cryptocurrency)2. Smart contracts3. Trading4. Supply chain management5. Anti-counterfeiting6. Healthcare7. Domain names8. Proof of existence9. Voting10. and many others! Programming Language: Java The use of third-party libraries for primary functionally is strictly prohibited, however, third party libraries can be used for other functionality such as communications and visualisation (such as normal JavaFX, JFreeChart, GraphStream, JGraphT, Yworks, JUNG or JMonkey). The use of other data structures for auxiliary operations is…
1. Asymmetric Encryption and Message Authentication: a) The primitive root of a prime number is the basic principle of Diffie-Hellman. i) Is 3 the primitive root of 11? Show the proof with your calculation. ii) What are the important criteria for selecting a prime number in cryptography? Is 11 a good choice for such a purpose? b) Find the parameters stated using the Diffie-Hellman methods, given the user A and B shared a prime number and its primitive root of 23 and 5, respectively. i) If user A public key value is 8, find the A’s private key. ii) If user B public key value is 19, what is the common secret key? c) In the following scenario, we will compare the security services that are given by digital signatures (DS) and message authentication codes (MAC). We assume that James can read all messages send from Chan to Badrul and the other way around, too. James has no knowledge of any keys but the public one in the case of DS. State whether and…
33. Lamport's one-time password scheme users the passwords in reverse order. Would it not be simpler to use f (s) the first time, f(f(s)) the second time, and so on?
Develop a software authentication module for your software (any type of and in anyprogramming language). Use a hash algorithm to obtain a hash code of user passwords.I) Store only hash code instead of raw passwords (identification). II) When a user requests an authentication, for an attempt to verification, create a hashcode of password and compare the stored one. III) If a match occurs, then authenticate the user. If authentication fails, inform the userproperly.
Step 1 Intro Cipher block chaining mode in DES (Date Encryption Standard): It is a type of cipher mode where all the cipher blocks are chained to avoid the replacement of blocks. In this model, all the blocks are chained before encryption; the plaintext in a block is XOR (Exclusive OR) with a cipher text of the previous bloc. Here, the key advantage is that the output present in the cipher text block is not the same as the plaintext block. arrow_forward Step 2 Solution: Cipher feedback mode in DES (Data Encryption Standard): This type of mode is used to encrypt the data by byte-to-byte. It is similar to the cipher block chaining mode, if the encryption process in cipher block chaining is reversed, it is the decryption process of Cipher feedback mode. During the encryption process, one byte is encrypted first and sent out. Then the encryption process is carried out with the next byte. Conclusion: The output stream generated by the encryption process in cipher…
Give the answer to each question. Find the answer my coding using python
7
). This problem is about the chaining method we discussed in the class. Problem 3 (, Consider a hash table of size N = 11. Suppose that you insert the following sequence of keys to an initially empty hash table. Show, step by step, the content of the hash table. Sequence of keys to be inserted:
Question 15 For Questions 15.1 - 15.2 consider the following integers: In a RSA cryptosystem with public- key (3233, 59), compute: 15.1 the private-key and give you final answer as an ordered pair (n, d).
What will be the ciphered text corresponding to “ALGORITHM” if bifid cipher is used for encryption with key as “KEY” with a period as 5? a) SBPISZTKZH b) PLNSOWGKQM c) SELFQEXBHM d) YFSGWNFBW