triple des uses mcq

The hash function View Answer. i) Public-Key Certificates ii) Public announcements iii) Publicly available directories iv) Public-Key authority options:- a) i) and ii) b) iii) and iv) c) i) and iv) d) iv) only Answer: c ````` Sample MCQ … Pretty good privacy (PGP) security system uses d) All of the mentioned d) None of the mentioned Which block cipher has key length of 128 bits? These ciphers replace a character or characters with a different character or characters, based on some key. Input message in Cryptography is called; (a) Plain text (b) Cipher Text (c) Plain and cipher (d) None of the above ( ) 2. b) Diffie-Hellman The private and the public key. 1.

a) Removal of redundant character

Cryptography and Network Security Objective type Questions and Answers.

The key size is increased in Triple DES to ensure additional security through encryption capabilities. All Rights Reserved. This is the MCQ in Cryptography from the book Data Communications and Networking by Behrouz A. Forouzan. Join our social networks below and stay updated with latest contests, videos, internships and jobs! Participate in the Sanfoundry Certification contest to get free Certificate of Merit. A directory of Objective Type Questions covering all the Computer Science subjects. Triple DES uses a "triple length" (168-bit) key and is also vulnerable to a meet-in-the-middle attack in 2 56 space and 2 112 operations, but is considered secure due to the size of its keyspace.
a) RSA Pretty good privacy (PGP) security system uses ... Triple-DES, IDEA and CAST can operate on 64 bit blocks of plain text and cipher text. The question paper contains 40 multiple choice questions with four choices and students will have to pick the correct one (each carrying ½ marks.). b) Has manageable collision View Answer, 6. b) Continuous logarithm problem Triple-DES has _____ keys. 1. (II YEAR) SEMESTER-IV ANALYTICAL SKILLS MODEL QUESTION PAPER ADIKAVI NANNAYA UNIVERSITY, B.Sc. c) Has high unmanageable level of collision Asymmetric key is also called: What are the Various Features and Advantages of MS WORD . This GATE exam includes questions from previous year GATE papers. c) Addition modulo 216 & Bit wise XOR (II YEAR) SEMESTER-IV DATASTRUCTURES MODEL QUESTION PAPER ADIKAVI NANNAYA UNIVERSITY, B.Sc. In symmetric-key cryptography, the key locks and unlocks the box is, The last two blocks of the XTS-AES mode are. The digital signature provides authentication to the a) 128 bit blocks b) False 8. d) None of the mentioned Here you can access and discuss Multiple choice questions and answers for various compitative exams and interviews. b) Private key cryptosystem Its key size is too short for proper security (56 effective bits; this can be brute-forced, as has been demonstrated more than ten years ago).Also, DES uses 64-bit blocks, which raises some potential issues when encrypting several gigabytes of data with the same key (a gigabyte is not that big nowadays). View Answer, 14. In more details: DES is the old "data encryption standard" from the seventies. © 2011-2020 Sanfoundry. ... UGC NET MCQs.

If you are looking for a reviewer in datacom, topic in Electronics Systems and Technologies (Communications Engineering) this will definitely help you before taking the Board Exam. The questions asked in this NET practice paper are from various previous year papers. 7. It uses 16 round Feistel structure. The question then becomes the simple case of applying the meet-in-the-middle attack to double encryption. c) 128 bits This set of Digital Communications Multiple Choice Questions & Answers (MCQs) focuses on “Pretty good privacy”. Practice test for UGC NET Computer Science Paper. b) Uniform distribution of characters View Answer, 13. B.Sc. c) Sender & Message View Answer, 5. An electronic document that establishes your credentials when you are performing transactions. GATE CSE MCQs. 1 2 5 4. b) 64 bit blocks An attacker can use a MITM attack to bruteforce Double DES with 2 57 operations and 2 56 space, making it only a small improvement over DES. DES is an implementation of a Feistel Cipher. A type of cipher that uses multiple alphabetic strings. Each block contains 64 bits of data. https://www.computersprofessor.com/2019/01/computer-fundamentals-multiple-choice_30.html. Triple Data Encryption Standard (DES) is a type of computerized cryptography where block cipher algorithms are applied three times to each data block. d) None of the mentioned The block size is 64-bit. In public key cryptography, a key that decrypts the message. d) None of the mentioned

In hash function output length is fixed. c) Removal of redundant character & Uniform distribution of characters A type of cipher that uses multiple alphabetic strings. b) False Which algorithm is used for public key encryption? 4. 10. View Answer, 3. here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Digital Communications Questions and Answers – Public Key Cryptosystems – 2, Next - Digital Communications Questions and Answers – Mobile Radio Propagation, Digital Communications Questions and Answers – Public Key Cryptosystems – 2, Digital Communications Questions and Answers – Mobile Radio Propagation, Java Algorithms, Problems & Programming Examples, Discrete Mathematics Questions and Answers, Object Oriented Programming Questions and Answers, C++ Programming Examples on Data-Structures, Java Programming Examples on Data-Structures, Java Programming Examples on Set & String Problems & Algorithms, C Programming Examples on Bitwise Operations, C Programming Examples on Data-Structures, Analog Communications Questions and Answers, C Programming Examples on Set & String Problems & Algorithms, Optical Communications Questions and Answers, Wireless & Mobile Communications Questions & Answers, Digital Image Processing Questions and Answers, Digital Signal Processing Questions and Answers, Digital Communication Questions and Answers, Cryptography and Network Security Questions and Answers. Networking MCQ Software Engineering MCQ Systems Programming MCQ UNIX System MCQ Neural Networks MCQ Fuzzy Systems MCQ. b) CAST d) 1024-2048 An encryption technique with 2 keys is ______________. c) Public & Private key cryptosystem

9. Answer: a

It is approximately twice as expensive to compute. (I YEAR) SEMESTER-II MATHEMATICS MODEL QUESTION PAPER ADIKAVI NANNAYA UNIVERSITY, Multiple Choice Questions and Answers on SaaS of Cloud Computing, Multiple choice Questions and Answers on PaaS of Cloud Computing. d) None of the mentioned Under DES, the data encryption standard took a 64-bit block of data and subjected it to ______ levels of encryption. a) Triple-DES View Answer, 7. A small program that changes the way a computer operates. The Triple Data Encryption Algorithm, alternately referred to as Triple DES (Data Encryption Standard), 3DES, TDES, Triple DEA, or TDEA, is a symmetric key-block cipher which applies the DES cipher in triplicate by encrypting with the first key (k1), decrypting with the second key (k2), and encrypting with the third key (k3). This set of Digital Communications Multiple Choice Questions & Answers (MCQs) focuses on “Pretty good privacy”.
b) Session key The key size of DES is a) 56 bits b) 64 bits c) 128 bits d) 168 bits View Answer. (I YEAR) SEMESTER-II SANSKRIT MODEL QUESTION PAPER ADIKAVI NANNAYA UNIVERSITY, B.Sc. There are 2 keys in triple DES as well.

d) None of the mentioned Questions from Previous year GATE question papers, UGC NET Previous year questions and practice sets. PGP offers _____ block ciphers for message encryption. a) Sender Attempt a small test to analyze your preparation level. c) RSA & Diffie-Hellman Encryption standard that is selected by the US government to replace DES. a) True c) 1024-4096 a) 56 bits Encryption is the study of creating and using decryption techniques. b) Message b) 1024-4056 b) Bit wise XOR How many keys are used in the ANSI X9.17 PRNG?

An asymmetric-key (or public-key) cipher uses, The original message, before being transformed, is.

Public key cryptosystem is used for the encryption of These three ciphers can operate of ______ of plaintext and cipher text. c) 256 bit blocks a) Messages 5. Use AES. View Answer, 12.

Computer Architecture MCQ DBMS MCQ Networking MCQ. Given the encryption key, In Cryptography, the input bits are rotated to right or left in. Sanfoundry Global Education & Learning Series – Digital Communications. In this section of Data Communication and Networking - Cryptography MCQ (Multiple Choice) Based Questions and Answers,it cover the below lists of topics.All the Multiple Choice Questions and Answers (MCQs) have been compiled from the book of Data Communication and Networking by The well known author behrouz forouzan. a) 1024-1056 View Answer, 2. View Answer, 15. d) None of the mentioned Computers Fundamentals, MS Office, C, Java, Web Technology. 2. C Programs. Test your knowledge of CISSP with these multiple choice questions. a) Addition modulo 216 Which should be used first to decrypt?

a) Public key For digital signatures private key cryptosystem is used. b) 64 bits

a) Discrete logarithm problem The key size of DES is d) 156 bit blocks b) Triple-DES c) IDEA & Triple-DES d) None of the mentioned Answer: a Q10) Which systems use a timestamp?

c) Discrete & Continuous logarithm problem (II YEAR) SEMESTER-IV PHYSICS MODEL QUESTION PAPER ADIKAVI NANNAYA UNIVERSITY, B.Sc.

c) IDEA & CAST View Answer, 10. View Answer, 16. View Answer, 8. a) True a) IDEA

a) Public key cryptosystem



What is the key size allowed in PGP? (II YEAR) SEMESTER-IV COMMUNICATION AND SOFT SKILLS (CSS-III) MODEL QUESTION PAPER ADIKAVI NANNAYA UNIVERSITY, B.Sc. (II YEAR) SEMESTER-IV CHEMISTRY MODEL QUESTION PAPER ADIKAVI NANNAYA UNIVERSITY, B.Sc. DSA protocol is based on a) Is collision free The outer two encryption layers can be joined into a single cipher, which we may call DES 2. b) Private key View Answer, 9. d) None of the mentioned d) None of the mentioned C - Arrays and Pointers. 1. d) 168 bits Data compression includes View Answer, 11. It can also have 3 unique keys. d) None of the mentioned That is a 64-bit block cipher with a 56-bit key, just like DES. Each Question Bank includes 20 practice questions that have been designed to measure your knowledge of key ideas. 3. Which operation is used in encryption using IDEA?

The plain text for the cipher text RRLMWBKASPDH. b) CAST To practice all areas of Digital Communications, here is complete set of 1000+ Multiple Choice Questions and Answers. c) Public & Private key This led to the adoption of Triple DES (3DES) as a standard for government communication. View Answer, 4. c) Session key & Messages

1 . The Data Encryption Standard (DES) is a symmetric-key block cipher published by the National Institute of Standards and Technology (NIST). c) IDEA

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