Please disclose all the differences between Hash function and Message Authentication Code (MAC)
Q: What is the difference between the directories of extendible and dynamic hashing?
A: Directories of extendible: Extendible hashing uses a directory to access it's buckets. This…
Q: q4- Symmetric Key Encryption uses a. One way hashing b. Does not need a key for encryption c.…
A: Given: Symmetric Key Encryption (SKE) makes use of...............................
Q: 1- Which is the most secure method of exchanging secret keys? A-Text B. Email C. Phone D.…
A: Sol. 1 Asymmetric Algorithm
Q: Block size = 4 bits Hash size = 4 bits Encryption function: Divide the key into two halves: LK and…
A: GIven: Block size = 4 bits Hash size = 4 bits Encryption function: Divide the key into two halves:…
Q: What is the use of a hash function? A. to erase data B. to calculate and return the index of…
A: A function that converts a given big phone number to a small practical integer value.
Q: What is the purpose of a hash function? To provide integrity To preserve a copy of all of the…
A: Hash Function - It is a function which takes arbitrary size of inputs and convert it into fixed…
Q: Block size = 4 bits Hash size = 4 bits Encryption function: Divide the key into two halves: LK and…
A: Here is the solution with explanation:-
Q: nsert the following keys: 1, 7, 3, 29, 27, 23, 19, 20, 11 into a linear hash table with 2 records…
A: Inserting given key in hash table = 1, 7, 3, 29, 27, 23, 19, 20, 11 For key 1, h(1) is 1%10=1 i.e.…
Q: Consider your name, take ASCII value of each character and map all those values in a Hash table…
A: NOTE: "Since you have asked multiple questions, according to the company's policy we will solve the…
Q: Load factor (A ) of a hash table is the ratio of. O The size of key to the size of hash table. O No.…
A: Answer :
Q: 1. Which of the following statements about cryptographic hash functions is correct: A.…
A: Given: Some statements are provided about cryptographic hash functions. Objective: We need to…
Q: Assume you wish to prevent an attacker from discovering a collision in a hash function. The attacker…
A: Introduction: Consider the scenario in which you want to prevent an adversary from discovering a…
Q: Select each correct statement. If a cryptographic hash function is preimage resistant, then it is…
A: Answer: The correct Option to the following question are: 1.If a cryptographic hash function is…
Q: Can a shared key be used to encrypt an AES key? Justify your answer Hash function is compared to…
A: Advanced Encryption Standard: The United States has selected the symmetric block cipher known as…
Q: Suppose a hash table has 11 locations, keys are placed in the table using the hash function f (x) =…
A: Sr. No. Key Hash Array Index Array Index after linear chaining 1 0 0 mod 11 = 0 0 0 2 12 12 mod…
Q: What are some of the benefits of employing the utilisation of a hash index table?
A: Hash index table: When working with very large data sets, hashing may become a bottleneck due to the…
Q: What role does compression play in the hash function?
A: The above question is answered bellow
Q: (10 pts) Assume a hash function H(m) which is collision resistant. This particular function maps a…
A: Solution : Hash function A hash function is a mathematical function that converts a number-based…
Q: Describe the Asymmetric encryption with hashing process in relation to the sender and receiver
A: Introduction: Asymmetric encryption encrypts and decrypts using a numerically linked pair of keys…
Q: What are some of the advantages of using a hash index table?
A: Introduction: A hash table (hash map) is a data structure in computing that implements the…
Q: In what ways does a hash outperform a checksum (such as the Internet checksum) in terms of message…
A: The hashing and check sum functions are very similar. Both methods take an input (m) and output a…
Q: Supposc a hash function is defined using a good-quality cncryption algorithm Er (m). For…
A: A hash function takes a variable sized input message and produces a fixed-sized output. The output…
Q: Q4: Based on MD5 hash algorithm, if we used 31 blocks and the padding size is 24 bytes. Find the…
A: D5 message-digest algorithm version 5 of Message-Digest Algorithm developed by Ron Rivest to produce…
Q: What characteristics are needed in a secure hash function
A: Needed characteristics are mentioned below: Pre Image resistance Second pre image resistance…
Q: Step Statement Number After creating a memo, Alice generates a hash on it. Bob then encrypts the…
A:
Q: hy can a hash function not be used for encryption in Cryptography?
A: The hash data is sends along with the original message to make sure to user that the data which is…
Q: What is the benefit of hash index table?
A: Given: What is the benefit of a hash index table?
Q: What role does the Hash function play in the creation of digital signatures
A: Answer :
Q: The following are applications of hash functions EXCEPT FOR Question 15 options: AES…
A: Explanation: False, hashing is not used in AES encryption AES encryption algorithm…
Q: Describe the process of Asymmetric encryption with hashing in relationship to sender and receiver
A: here have to determine process of Asymmetric encryption.
Q: The first step of most signature schemes consists in hashing the message to be signed. Discuss which…
A: Non-reversebility: A useful hash approach is to calculate the hash value that is supposed to be…
Q: Is it possible to encrypt an AES key using a shared secret? Justify your answer Consider the hash…
A: Introduction: The Advanced Encryption Standard (AES) is a symmetric block cypher that the United…
Q: 2.Define hash table, its limitation and possible solutions.
A: Our task: Hash Table is the one of the collection type in java. It is use for the memory…
Q: Hash function John, Bob, and David want to store their valuable data into storage that has 245…
A: Hash function is used to keep manage of the data items whose entry is present in it.
Q: State the differences in hash codes. Draw diagrams to present the differences.
A: Given: Describe the distinctions between hash codes. Make diagrams to show the differences.
Q: In a well organized essay, not a series of bullets, explain what "hashing" is. What is it used for?…
A: Hashing is the process of converting a given key into another value. I hash function it is used to…
Q: Block size = 8 bits Hash size = 8 bits Encryption function: Divide the key into two halves: LK…
A: ANSWER : Given a message m:AB12 (in Hexa) ; A=1010 B=1011 1=0001…
Q: Following is a list, in descending order of importance, of the elements that influence the Big-O…
A: The following are the key factors that determine a hash table's Big-O performance: A hash table is…
Q: 24. What characteristics are needed to consider a hashing algorithm secure ?
A: Hashing algorithm A hashing algorithm is a cryptographic hash function. A hash function is any…
Q: (a) Explain why digital signatures are required when utilising public-key cyphers. (a) Explain a…
A: Intro a) Using digital signatures in conjunction with PKI or PGP strengthens them and reduces the…
Q: What is the purpose of the hash function? And how does
A: Given:- What is the purpose of the hash function? And how does it work?
Q: Strings of undefined length are used as keys to access a hash table. Report the C implementation of…
A: Answer : Here is the algorithm in C (assuming each array item is a string key and integer value):…
Q: What are the prerequisites for utilising the hash function?
A: The following characteristics must be present for a cryptographic hash function: The length of the…
Q: List the key factors that affect the Big-O performance of a hash table:
A: Hash Table is a data structure in which data/element are stored in an associative manner. In hash…
Q: Consider your name, take ASCII value of each character and map all those values in a Hash table…
A: A load factor value is always lower than 1 so because the average load value is always lower than…
Q: Calculate the hash value using Folding Method for keys 1921678, 777281, 1892, 1921, 21017 for hash…
A: Summary:In this question, we need to calculate the hash value for the given keys using the folding…
Q: Computer Science/Encryption, please help. You find out that your University is using an…
A: Step 1: A message authentication code (MAC) based on using a hash function with the secret prefix…
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- Explain what the following lines of code do pad = len(byteblock)%16 * (-1)byteblock_trimmed = byteblock[64:pad]ciphertext = cipher.encrypt(byteblock_trimmed)ciphertext = byteblock[0:64] + ciphertext + byteblock[pad:]if [ $(id -u) -eq 0 ];then read -p "enter username:" username read -s -p "enter password:" password egrep "^$username"/etc/passwd>/dev/null if [ $? -eq 0];then echo "$username exists!" exit 1 else pass=$(perl -e 'print crypt($ARVG[0], "password")' $password) useradd -m -p "$pass" "$username" [ $/ -eq 0 ] && echo "user has been added to system!" || echo "Failed to add a user!" fi else echo "Only root may add to the system" exit 2 fi * recheck the code if this is valid syntax for account management or suggest /do another user account management shell script that runs in unix terminal and please attache the output at the endVigenere Cipher By finding the key length in worksheet 7 .doc, you can use frequency analysis for each letter of the key in the cipher to find the particular shift and find the key word. Using the keyword you found, decrypt the following text. Enter your answer with no spaces. (Not case sensitive) ciphertext to decrypt: UHBRXATCBSZ UHFK PSUG NPPP UAOR UHJL HTPP FAMG AEBZ PUUR IEWG HEOC SEDG QESG TTIY UTIC TEDS SIUW DONC TDPU OTPI FEQG OGUF FKFW MEOE UHBQ FCSC U.IGR IELC ZLFL HTIA BNCC EEUC SMJL FDUF FNPL FITY CLFR PDPY GRFO VE OA ZAOY MYTG TOOR IEGG SSU.Q FCPL E,TIG SD,FR DLFR UESM GTIC LEZ.Z BBCY HEXY TACJ FTPZ SEBI WIHC OESC CYGG ODJL HGBN TOGY GIYC ELFL HTIZ FTXC FNDM NMPL QHSY TETM SWPP ES.PL DEIC IAEY OUNZ FRPD UHFQ F.HFI OEXR IELC ZLFL HTIK VSUZ FADM NMPL EIWG TOSM GAMJ PFUF FSFE BPT.D PRFV BMQJ FIGF FOCQ FRWC EGBN TOGD PRUW. UWFL UYGG WEBL EFJD UEFL, UHFL JTXY TLJI FLZR IELC ZHBB MEOE UHPD GIWC. XIUF UHJQ PBTC SVBR JOOR IETC DUSG UYPD UHJQ QASR JCVJ BRDP ZPUM TYTR FMXY TLPQ UFPP…
- Implement the one-time pad encryption scheme in Microsoft Excel. Your worksheet should look as follows: For Encryption: - Have the message occupy adjacent cells in one row, with one bit of the message in each cell. Align the key (the one-time pad) with the message in the next row. Note that the key should be of the same length as the message. In the next row, enter a formula that computes the ciphertext. Decryption is similar: - Have the ciphertext occupy adjacent cells in one row, with one bit of the ciphertext in each cell. Align the key (the one-time pad) with the ciphertxt in the next row. Note that the key should be of the same length as the ciphertext. In the next row, enter a formula that computes the plaintext (message). .Code 1: Caesar Cipher You Need a Caesar Cipher to Crack This Code. (Key = 11) LWW STD ACZAPCETPD, NLXP FAZY L XLDV, LY LOXTCLMWP TXTELETZY Code 2: Vigenere Square You Will Need to Use a Vigenere Square to Crack This Code. (Keyword: AESOP) a fwojtmxia hisr! nex ah xs sx bd vedit, aw ah tnxaftlc dorkw tfpirk. Code 3: Rail-Fence You Need a Rail-Fence Cipher to Crack this Code. (Key = 2) aoetrdhhuefncoadumgntruhfxneeteosoaatrnrmaighog Code 4: Enigma Use the Enigma Simulator to Crack this Code. Starting Rotor Position: IST YHNJLBSLFNUPIBJYQSNYRUBMOLYCDRUVCLRBGMBCVW Code 5: ???????? You’re On Your Own With This One. Crack The Code! BVSZF:Z NZUS NZTX UY VN FUGGFX CYX QUGRVCG YXOYX. Directions: Solve each line of ciphertext that have been encoded. When finished, the resulting lines of plaintext will form a secret message. Rearrange these lines of plaintext so that you can read the original message. (Hint: the resulting message will be a fable by a historical writer!) Note: Please…WHY AM I GETTING THIS ERROR? What is the solution? with conn: AttributeError: __name__ Code Below: import serial import time import MySQLdb as mdb arduino = serial.Serial('/dev/ttyACM0') arduino.baudrate=9600 data = arduino.readline() time.sleep(1) data = arduino.readline() pieces = data.decode('utf-8').split("\t") # pieces = data.decode('utf-8').rstrip() temperature = pieces humidity = pieces conn = mdb.connect('localhost','root','raspberry','exampledb'); cursor = conn.cursor() with conn: cursor.execute("""INSERT INTO tempDB (Temperature,humidity) VALUES(1,%s,%s)""",(temperature,humidity)) conn.commit() cursor.close()
- myBytes BYTE 10h,20h,30h,40hmyWords WORD 8Ah,3Bh,72h,44h,66hmyDoubles DWORD 1,2,3,4,5myPointer DWORD myDoublesLAB 10.1 Character Testing and String ValidationThe American Equities investment company offers a wide range of investmentopportunities ranging from mutual funds to bonds. Investors can check the val-ue of their portfolio from the American Equities’ web page. Information aboutpersonal portfolios is protected via encryption and can only be accessed usinga password. The American Equities company requires that a password consist of8 characters, 5 of which must be letters and the other 3 digits. The letters and dig-its can be arranged in any order. For example,rt56AA7q123actyN1Lo0Dwa9myNUM741are all valid passwords. However, the following are all invalid:the476NEw // It contains more than 8 characters (also more than 5// letters)be68moon // It contains less than 3 digits.$retrn99 // It contains only 2 digits and has an invalid character (‘$’) American Equities needs a program for their web page that determines whether ornot an entered password is valid. The program american_equities.cpp…You are creating an app that will allow university students to connect with advisors and other students to discuss stressful situations. Only students who attend the university can access the app. Which two steps should you take to protect student’s identity and personal information? (Choose two.) Group of answer choices Hash student data transmissions with a random salt. Hash the password using an algorithm in the Google database Hash the password with a random salt. Encrypt the password. Encrypt student data transmissions.
- Python 3 The passwords.csv is as shown below Validate Passwords in Check FileMarch2021 INVALIDiudj8&neB09 ValidMyDogWo0f INVALIDmv3m959 INVALIDven1vid1v1c1Iulius INVALID123456789 INVALIDabcdefgcijk INVALIDWhat#ItN0w INVALIDwindsofchange INVALIDHelloMyNameIs INVALID4584208 INVALID4586300 INVALIDAnniv&0629 ValidBDay@1955 INVALIDBigBadW0d! Valid!Rf0donotcare ValidR85r!4L145 ValidS3att!eWa ValidSONameHere INVALIDAbc!23 INVALID Format Lines for ReportUse the following format lines to produce correctly formatted output.Headerprint( "\n\n%62s" % "Validate Passwords in Check File\n" )Detail LineValid Passwordsprint( "%40s\tValid" % word )Invalid Passwordsprint( "%40s\t\t\tINVALID" % word )Where “word“ is the name used to address individual entries in the List returnedfrom buildList.Data Encryption Standard Perform a Data Encryption Standard encryption on the plaintext (PL) by using key (K). The PL is your first 8 characters of your name and K is the last 8 digits of your student ID. For example: Name: Siti Fajar Plain text (PL): SITIFAJA Student ID: 201908040016 Key (K): 08040016 Show detail step by step involved.No plagarism please! Correct and detailed answer will be Upvoted else downvoted. Thank you! Q.Which of the following is an example of polygram substitution ciphers? a. ROT-13 b. OTP c. ATBASH d. None of the available options is correct