Ubuntu - what are the commands used to decrypt a ciphertext with an encryption key? - Use pictures to show the commands used for this
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Ubuntu - what are the commands used to decrypt a ciphertext with an encryption key? - Use pictures to show the commands used for this
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- 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. ciphertext to decrypt: UHBRXATCBSZ picture of worksheet attachedWhen sending a large file, which method uses less encryption operations, cypher block chaining or cypher feedback mode?And which one is much more effective?Vigenere 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…
- Q1) Which encryption method is better: stream cipher or block cipher and why?2. RSA uses modulo math as the basis for creating a public and private key True. or. False 4.When the intruder knows some of the plaintext and cipher-text pairings, this is known as what type of attack? Cipher-text attack Known-plaintext attack Chosen-plaintext attackWhich of these encryption techniques does NOT rely on a key? a. Polyalphabetic substitution-based cipher b. Data Encryption Standard c. Monoalphabetic substitution-based cipher d. Transposition-based cipher No hand written and fast answer with explanation
- Please answer all parts of the question 2. For the given plaintext: “thechildrenlearntocipherandsing” and cipher mentionedbelow, find the ciphertext: a. Key = 5 for Rail Fence cipherb. Key = 4 (number of rows) for Transposition cipherc. Key = 3 for Rail Fence cipherd. Cipher text is circular shift RIGHT by 2 positions• For example: circular shift right by 1 position: leftmost bit in the ciphertextis the same as rightmost bit in the plaintexte. Cipher text is logical shift left by 2 positions• Logical shift left by 1 position: Rightmost bit becomes ‘0’.What precisely is the difference between stream ciphers and block ciphers? Stream ciphers and block ciphers both encrypt data. Please offer an explanation for each of the following: three separate differencesYou are the administrator for your company network. You and a colleague are discussing the key archive store. The key archive stores which of the following information? Group of answer choices The public key and private key only The public key, private key, and supported cryptographic algorithms only The subject name, public key, private key, and supported cryptographic algorithms The public key only
- using a simple transposition cipher with five columns and eight rows. Type the resulting ciphertext in upper case letters only. Your result should contain 7 groups of five letters each and a final group of four letters and there should be a space between each group of letters in the ciphertext. Ignore the quote marks and ignore all spaces in the plaintext phrase.Which encryption method encrypts individual files so that only the owner and other users who have been authorized can decrypt the file and read it?An underground resistance group wants to write articles with completely differ- ent security goals. The resistance group shared a secret at the last resistance meeting that they can all use for these articles. Here are their goals: Only users with the shared secret should be able to upload to the server. Only users with the shared secret should be able to read the articles. Any changes to the article should still be easily detectable The resistance is paranoid about both quantum computers and any mod- ern encryption algorithms so they want to avoid public key cryptography. They only trust AES (symmetric key encryption) and SHA-256 (crypto- graphic hashing) since these have been around for decades and are resistant to quantum computers. Write a protocol for the underground paper to authenticate authors before publishing to the server. (HINT: Make sure that this protocol cannot be tricked by someone who has been listening to the previous article upload) Write a protocol for the server…