Encrypt The following correspondence between letters and numbers is used in the Caesar cypher. de fg hij 2 3 4 a kim n o p q st u V x y z 1 5 6 7 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Encrypt the animal name zebra with the Caesar cypher with a key of 3. What is the encrypted animal name (enter a string of letters with no spaces)? Decrypt An animal name was encrypted with the scheme described in the previous question (it was encoded with the key 3). The encrypted animal name is pduprw. What is the animal name?

Encrypt The following correspondence between letters and numbers is used in the Caesar cypher. de fg hij 2 3 4 a kim n o p q st u V x y z 1 5 6 7 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Encrypt the animal name zebra with the Caesar cypher with a key of 3. What is the encrypted animal name (enter a string of letters with no spaces)? Decrypt An animal name was encrypted with the scheme described in the previous question (it was encoded with the key 3). The encrypted animal name is pduprw. What is the animal name?

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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Alice wishes to tell Bob about the animal she saw at the zoo Alice and Bob share the key stream 1101 1001 0000 1010 1110 1101 Alice creates a 3-character ASCII message, encodes it, and sends it to Bob. This is the ciphertext: 1001 1111 0100 0101 1011 0101 Bob deciphers the message. What animal did Alice see at the zoo?
A simple cyclic substitution cipher replaces each English letter with one that is n letters away in the alphabet. What is the plaintext for the following ciphertext, which was encrypted using a simple substitution cipher: XWNVTMBHG BL PATM KXFTBGL TYMXK T IXKLHG ATL YHKZHWWXG PATM HGX ATL EXTKGXW BG LVAHHE
Suppose we will use Advanced Encryption Standard (AES) to encrypt a block of plaintext and the known round key for round 7 is: B5 8D BA D2 31 2B F5 60 7F 8D 29 2F EA D2 73 21 What is the third word (i.e. the third 4 bytes) of the round key for round 8?
The ciphertext AAAAFXGGFAFFGGFGXAFGADGGAXXXFX was encrypted using the ADFGX cipher with the 5×5 matrix in Section 2.6 and the keyword broken. Find plaintext. \begin{tabular}{c|ccccc} &A&D&F&G&X\\ \hlineA&p&g&c&e&n\\D&b&q&o&z&r\\F&s&l&a&f&t\\G&m&d&v&i&w\\X&k&u&y&x&h\end{tabular} Do I need to reorder the columns so that the column labels are in alphabetic order? Please give proper explanation and typed answer only.
lice and Bob shares a secret 8-bits key “10110110” for encryption using XOR. Alice wishto encrypt the following message to Bob: “NOMEETING”Refer to UTF-8 encoding to get the binary code for the letters, and then apply the key to each letter. Write the corresponding ciphert text in binary.
Alice wants to securely send Bob an arbitrary numberM from the set {0, 1, . . . , N − 1} for some positive integer N. She wants to have ascheme with perfect secrecy. She heard of the One Time Pad (OTP), but OTP isfor bitstrings, not numbers. She decides to use the following scheme. The key spaceis {0, 1, . . . , N − 1}. A ciphertext C for M is computed as (M + K) mod N anddecryption performs (C − K) mod N.Prove that this scheme is perfectly secure
I want Examples on el gamal cipher i want 2 Examples like this Example of ElGamal encryption Alice chooses pA = 107, α A = 2, dA = 67, and she computes β A = 267 ≡ 94 (mod 107). Her public key is ( pA, α A, β A) = (2,67,94), and her private key is dA = 67. Bob wants to send the message "B" (66 in ASCII) to Alice. He chooses a random integer k = 45 and encrypts M = 66 as (r, t) = ( αA k , βA kM) ≡ (245, 944566) ≡ (28, 9) (mod 107). He sends the encrypted message (28, 9) to Alice. Alice receives the message ( r, t) = (28, 9), and using her private key dA = 67 she decrypts to tr−dA = 9⋅28−67 ≡ 9⋅28106−67 ≡ 9⋅43 ≡ 66 (mod 107)
The affine cypher with key "9x+3" was used to encrypt the following text. (To encode, multiply the letter by 9 and then add 3 (mod 26).) The encryption result of the letter "A" is, for example, "D." Decrypt the ciphertext below. GNVBAXSL XG QWB
The ciphertext below was encrypted using a substitution cipher. In your favorite language (in C++ or Python) decrypt the ciphertext without knowledge of the key using frequency analysis lrvmnir bpr sumvbwvr jx bpr lmiwv yjeryrkbi jx qmbm wi bpr xjvni mkd ymibrut jx irhx wi bpr riirkvr jx ymbinlmtmipw utn qmumbr dj w ipmhh but bj rhnvwdmbr bpr yjeryrkbi jx bpr qmbm mvvjudwko bj yt wkbrusurbmbwjk lmird jk xjubt trmui jx ibndt wb wi kjb mk rmit bmiq bj rashmwk rmvp yjeryrkb mkd wbi iwokwxwvmkvr mkd ijyr ynib urymwk nkrashmwkrd bj ower m vjyshrbr rashmkmbwjk jkr cjnhd pmer bj lr fnmhwxwrd mkd wkiswurd bj invp mk rabrkb bpmb pr vjnhd urmvp bpr ibmbr jx rkhwopbrkrd ywkd vmsmlhr jx urvjokwgwko ijnkdhrii ijnkd mkd ipmsrhrii ipmsr w dj kjb drry ytirhx bpr xwkmh mnbpjuwbt lnb yt rasruwrkvr cwbp qmbm pmi hrxb kj djnlb bpmb bpr xjhhjcwko wi bpr sujsru msshwvmbwjk mkd wkbrusurbmbwjk w jxxru yt bprjuwri wk bpr pjsr bpmb bpr riirkvr jx jqwkmcmk qmumbr cwhh urymwk wkbmvb a) Frequency analysis:…
Encrypt the message " MATH " by translating the letters into numbersand then applying the encryption function given, and then translating the numbers back into letters.(a) f(p)=(17p+5) mod 26 _____ (b) f(p)=(15p+14) mod 26 ___ (c) f(p)=(19p+5) mod 26 ___Use A=0,B=1,C=2,D=3,E=4,F=5,G=6,H=7,I=8, J=9,K=10,L=11,M=12,N=13,O=14,P=15,Q=16,R=17, S=18,T=19,U=20,V=21,W=22,X=23,Y=24,Z=25
Describe the differences between a monoalphabetic cipher and a polyalphabetic cipher. Is the Caesar cipher a polyalphabetic cipher? In one of his cases, Sherlock Holmes was confronted with the following message: Znk yozagzout oy mxgbk. Iusk osskjogzkre Although Watson was puzzled, Holmes was immediately able to deduce the type of cipher. Describe the cipher being used to encrypt this message. Can you decode the message? Is this cipher susceptible to brute-force cryptanalysis?
1.Suppose Alice sent the following secret message: 001000000100100100111001001010000011101000111010 The decryption key was discovered to be: 01101001Decrypt the message into plain text.. 2.List and state what is represented by the three code snippets provided below in less than one sentence each? Snippet #1 Snippet #2 Snippet #3 push %ebpmov %esp, %ebp sub X, %esp mov %ebp, %esp pop %ebpret leave ret