Explain own words CRYPTOCURRENCYIt is a digital currency in which transactions are verified andrecords maintained by a decentralized system usingcryptography, rather than by a centralized authority.You can own cryptocurrency by either:• Directly buyingCryptominingCRYPTOMININGBy mining, you can earn cryptocurrency without having toput down money for it.It is the method of verifying transactions on a digital ledgerfor a blockchain using machines with extensive computingpower. It has to do with the process where specializedcomputers, also known as nodes or mining rigs, validateblockchain transactions for a specific cryptocoin and, inturn, receive a mining reward for their computational effort.

Summary CryptocurrencyCryptocurrency is likewise known as as crypto-currency Or simply crypto. it is…

Answered: CRYPTOCURRENCY

Engineering

Computer Science

CRYPTOCURRENCY

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

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ProblemFor the purposes of collecting entropy or obtaining cryptographically robust pseudo-random data, you should use a library-level access to EGADS. On a system like Microsoft Windows, for instance, where there isn't a built-in API for obtaining it, you might need entropy.
PLAIN TEXT: ALIVE KEY: YOU CIPHER SYSTEM; VIGENERE The resulting cipher text is A B C D E F G H I J K L M N O P Q R S T U V W X Y Z AABCDEFGHIJKLMNOPQRSTUVWXYZ E|F|G|H|I|J|K|L|MNOPQRSTUVWXYZA CCDEFGHIJKLMNOPQRSTUVWXYZAB DDEFGHIJKLMNOPQRSTUVWXYZABC BBCD EEFGHIJKLMNOPQRSTUVWXYZ ABCD FFGHIJKLMNOPQRSTUVWXYZ ABCDE GGHIJKLMNOPQRSTUVWXYZABCDEF HHIJKLMNOPQRSTUVWXYZABCDEFG IIJKLMNOPQRSTUVWXYZABCDEFGH JJKLMNOPQ|R|S|T|UVWXYZ ABCDEFGHI KKLMNOPQRSTUVWXYZABCDEFGHIJ LLM|NO|P|Q|R|S|T|UV|W|XY|Z|A|B|CD|E|F|G|H|I MMNOPQRSTUVWXY|Z|A|B|CDEFG|H|I|J|K|L NNOPQRSTUVWXYZABCDEFGHIJKLM OOPQRSTUVWXY|Z|ABCDEFGHIJKLMN PPQRSTUVWXYZABCDEFGHIJKLMNO JK QRSTUVWXYZ ABCDEFGHIJKLMNOP RRSTUVWXYZABCDEFGHIJKLMNOPQ SSTUVWXYZABCDEFGHIJKLMNOPQR TTUVWXYZABCDEFGHIJKLMNOPQRS UUVWXYZABCDEFGHIJKLMNOPQRST VVWXYZABCDEFGHIJKLMNOPQRSTU WWXYZ ABCDEFGHIJKLMNOPQRSTUV XXYZABCDEFGHIJKLMNOPQRSTUVW YYZABCDEFGHIJKLMNOPQRSTUVWX ZZABCDEFGHIJKLMNOPQRSTUVWXY о схохо O YDMDK O AMKYI O YZCTS
True or False 9. An example of a lightweight cryptographic block cipher is the Scalable Encryption Algorithm.
Cryptography is the practice of encryption. Information Security uses cryptography techniques to encrypt and decrypt data. A simple encryption method might take plaintext and mix up the letters using some predetermined pattern and then use that pattern to decrypt the data for reading. Ciphers are the algorithms used to put the data into its secret pattern and then systematically decrypt it for reading. This script is going to use a famous simple cipher called the Caesar Cipher. It is a substitution cipher where each letter in the text is 'shifted' in a certain number of places. It uses the alphabet as the primary pattern and then based on the shift number, it would shift all the letters and replace the alphabet with our pattern. For example, if our shift number was 3, then A would be replaced with D, if we performed a right shift. As an example: Text = "THE CAT IS VISIBLE AT MIDNIGHT" Ciphertext = "WKH FDW LV YLVLEOH DW PLGQLIJKW" The keys to decrypt this message are the shift number…
Cryptography is the practice of encryption. Information Security uses cryptography techniques to encrypt and decrypt data. A simple encryption method might take plaintext and mix up the letters using some predetermined pattern and then use that pattern to decrypt the data for reading. Ciphers are the algorithms used to put the data into its secret pattern and then systematically decrypt it for reading. This script is going to use a famous simple cipher called the Caesar Cipher. It is a substitution cipher where each letter in the text is 'shifted' in a certain number of places. It uses the alphabet as the primary pattern and then based on the shift number, it would shift all the letters and replace the alphabet with our pattern. For example, if our shift number was 3, then A would be replaced with D, if we performed a right shift. As an example: Text = "THE CAT IS VISIBLE AT MIDNIGHT" Ciphertext = "WKH FDW LV YLVLEOH DW PLGQLIJKW" The keys to decrypt this message are the shift number…
Digital signatures have a potential weakness due to lazy users. In e-commerce transactions, a contract might be drawn up and the user asked to sign its SHA-1 hash. If the user does not actually verify that the contract and hash correspond, the user may inadvertently sign a different contract. Suppose that the Mafia try to exploit this weakness to make some money. They set up a pay Web site (e.g., pornography, gambling, etc.) and ask new customers for a credit card number. Then they send over a contract saying that the customer wishes to use their service and pay by credit card and ask the customer to sign it, knowing that most of them will just sign without verifying that the contract and hash agree. Show how the Mafia can buy diamonds from a legitimate Internet jeweler and charge them to unsuspecting customers.
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 Cipher
вов Message (m) ALICE Hash Hash MAC Function Function Message (m) Yes Same? MAC Insecure medium MAC Study the scheme that is shown in the scenario above, and answer the following question: Show whither this scheme guarantee the following security services (please justify, your answer for each service): First: Message integrity. Second: Message oconfidentiality. Third: Non-repudiation. Fourth: Message authentication. Fifth: Entity authentication. For the toolhar, press AlT+F10(PC)or Al T+EN+F10 (Mac)
It is often claimed that passwords do not get saved as plaintext anywhere in systems, and even the system administrator does not know your password. Given what you learned about hash functions. Explain how such a claim is possible. In other words, how do systems perform authentication without having to store passwords in a format that can be read by the system administrators. Authentication is primarly the process of verifying that provided password is correct. Design a simple authentication system and implement the following two methods: def signup (username, password): '''store the user credential so that the system knows how to authenticate the user in the future (when login () gets called).' def login (username, password): "''returns True, if the provided username and password are correct'''
Question 1 Study the scenario and complete the question(s) that follow: Ceasar Cipher The Caesar Cipher technique is one of the earliest and simplest method of encryption technique. It's simply a type of substitution cipher, i.e., each letter of a given text is replaced by a letter some fixed number of positions down the alphabet. For example with a shift of 1, A would be replaced by B, B would become C, and so on. The method is apparently named after Julius Caesar, who apparently used it to communicate with his officials. 1.1 Write a Ceasar cipher algorithm in such a way that a character D is changed to N. Derive the encryption of the other characters accordingly. 1.2 Based on your algorithm, what will be the encrypted code of the message “my mother is not home". End of Question 1
A SAF authorization form is used in most universities to approve funding for students to aid their studies. Suppose a student fills out a blank form and sends it to his or her departmental chairperson for a signature. If the amount of funds requested by the student is small (under 10,000 Tk), then the chairperson signs the form and routes it to accounts payable to be input into the accounting system. The system cuts a check that is sent to the student for the right amount, and after the check is cashed, the form is filed away with the canceled check. If the check is not cashed within 30 days, the form expires. When the amount of the requested fund is large (over 10,000 Tk), the chairperson signs the form and sends it to the chief financial officer along with a paragraph explaining the reason for the grant, and the chief financial officer will sign the form and pass it along to accounts payable. Both the chairperson and the chief financial officer can reject the SAF authorization form…
It is not the same thing as having an encrypted password database on your computer if you have a file where you keep hashed passwords, but what exactly is the difference between the two?