BSc CS Sem 5 BSc CS Semester 5 (2020 2021) 2021 TYCSINSPDF Question Paper - Mumbai University | munotes

1 Assurance Of data secracy is called Availability
2 Assurance of no change in data during transmission is confidentiality
3 Assurance for available of data, resources to authorised user is refei Availability
4 kind of attack. Release of message cor
5 is nota kind of passive attack. Release of message cor
is method to encode plain text into cipher text. Encipherment
7 process as: y = E(k,X) assymetric encryption
8 In___ type of attack, attacker guesses all the possible password by cryptoanalysis
9 is not a type of attack on encrypted text. cipher text only
11 If plain text is" viva" , using key as 4 by applying ceaser cipher
12 Key size of monoalphabetic algorithm 26
algorithm is also known as One time pad. vernam
14 type of techniques original message id hidden in normal me steganography
16 DES algorithm have bits plain text block. 64
17 DES algorithm have number of rounds. 4
18 key size of DES algorithm 64
19 algorithm phase convert key into 48 bit. expansion
20 The principle of ensures that the sender of a message can not authentication
21 The four primary security principles related toa message
22 In substitution cipher, the following happens: characters are replaced
23 The process of writing the text as diagonals and reading it as sequer Rail Fence techniques
24 The matrix theory is technique. Hill cipher
25 type of algorithm. symmetric
28 attack person pretend as a authorized person. Replay
29 OFB stands for Output Feedback
30 type of algorithm 5*5 matrix is used. Cesear cipher
Consider plaintext " college" and key=2, find cipher text using
32 In___ text from secret message are overwritten with pencil or any marking
33 In____ key pair ( public and private) is used. asymetric
34 of algorithm two large prime numbers are selected by
Replay Denial of service Masquerac Release of message content
transposition substitution and trar hybrid encr substitution
rows are replaced by columns are of the characters are replaced by other character
asymetric both none of the asymetric
On Feedback Open Feedback Over Feedk Output Feedback
symmetric both none of the asymetric
type of algorithm is used as key exchange algorithm deffie hellman
2 suffers from Man-in -the-Middle attack. RSA
3 Man in the Middle attack is also called Bucket Brigade attack
4 MAC stands for__ message authenticatio
5 Denial of receipt of message by destination type of attack. source repudiation
6 Denial of transmission of message by source is__ type of attack. source repudiation
7 Release of message to any unauthenticated user type of attack. disclosure
8 functions are mathematical function that converts one value into < key
9 Reverse of hash function doesn’t give original value. It resist to reach ori pre image resistance
10 When two different inputs finds same hash value , then it is called
11 SHA stands for__ standard hash algorith
12 Process of trying to break any cipher text message to obtain the origina cryptanalysis
16 When attacker breaks A's private key its universal forgery
In SHA padding is done in such a way that the length of
17 bits short of multiple of 512. 28
18 AAA protocol refers to__ Authentication
20 Kerbores is a____ protocol. Authentication
21 In kerbores TGS stands for __ Ticket Granting Systerr
22 In PKIX ___ relates to registration process. registration authority
24 The __standard defines the structure of a digital certificate. X.109
25 not a function performed by PKIX. registration
attack attacker forges a signature for a particular message
26 chosen by attacker. universal forgery
When attacker known senders public key and based on that he attack is
27 refered as key only attack
28 not a element of public key cryptosystem. encryptio/decryption
In type attack attempts to use all possible permutation and
maps a message of any length into fixed length value as
a function of the message and a secret key that produces a fixed
31 length value as authenticator. MAC
32 ___is finger print or the summary of a message. encryption message
33 SHA -1 produces hash value of __ bits. 160
phishing attack — brute force none of these Bucket Brigade attack
destination repudi: content recovery none of these destination repudiation
destination repudi: content recovery none of these source repudiation
content of modific traffic analysis timing modification disclosure
hash map all hash
input double hash double none of these collision
Authorisation Accounting All of these All of these
known message at total break forgery key only attack
append length divide input in 512 block all of the above all of the above
QN QUESTION A B C D CORRECT
1 Security feature offered by PGP. . Encryption Non repudiation Integrity All Above All Above
2 PGP stands pretty good private goal publ public and get none of the ak pretty good privacy
phase creates message digest of email message
Resulting message digest is encrypted with sender’s
4 ZIP program is used for . Compressio Deletion Loading Encryption Compression
5 PGP public key cr private key crypt public and priv none of the ak public and private key
6 Data compression means__ deleting rep: uniformdisributic deleting repea none of the ak deleting repeated characte
7 PGP doesnot support algorithm for encryption AES DES-3 IDEA COLUMNAR COLUMNAR
8 In PGP session key is encrypted with__ algorithm. RSA AES IDEA CAST RSA
9 In PGP message is encrypted with__ algorithm. RSA CAST MD secret key CAST
10 PGP is used emails file encryption email and file of the ak email and file encryption
11 S/MIME stands for standard mustandard mail int secure mail ini Secure/Multipurpose Inte
15 killing of user threads threats leads type attack. denial of ser integrity authentication confidentiality denial of service
16 Modification of message during attack integrity authentication denial of servi integrity
17 When either client or server detects error then protoc Alert Handshake Common Alert
18 In SSLconnection between users peer to peer multipoint peer to peer arany one from | peer to peer
19 SSL record protocol provides _ confidentiali integrity confidentiality availability confidentiality and integrit
protocol allows the server and client to authenticate Alert Handshake records Encryption Handshake
provides a secure communication channel among all the SET PGP MIME none of the ak SET
22 seize or control monitoring system or supresses at misfeaser masquerader All Above clandestine
23 Access to the password file is limited to one or a very few contr available control secure one wa information cc access control
24 Set of rules are created and check whether behavio stastical deterule based detec expert detectic secure detecti rule based detection
type of virus infects the system area of a Rabbit Virus Sector Macro Virus Boot Sector Virus
26 is not a phase of Virus life cycle. Dismissed Triggering Propagation Dormant Dismissed
27 In dormant phase virus becomes Inactive Duplicate Replicate Completion
phase the virus replicates itself and attaches itself Execution Dormant Propagation Propagation
to some program
type of algorithm is used as key exchange algorithm hellm:RSA DES AES deffie hellman
3 Man in the Middle attack is also called Bucket Briga phishing attack brute force none of these Bucket Brigade attack
4 MAC stands for__ message aut message approve message accer message audit message authentication cc
5 Denial of receipt of message by destinationis type of atisource repuc destination repui content recove none of these destination repudiation
6 Denial of transmission of message by source type of a source repuc destination repui content recove none of these source repudiation
7 Release of message to any unauthenticated user content of analysis timing modific disclosure
8 A___ functions are mathematical function that converts on key hash map all hash
9 Reverse of hash function doesn’t give original value. It resis pre image re original resistanc value resistanc reverse resiste pre image resistance
10 When two different inputs finds same hash value , then it i:collision input double hash double none of these collision
11 SHA stands for__ standard has secure hash Algo same hash hash a secure hash Algorithm
12 Process of trying to break any cipher text message to obta cryptanalysis HMAC MAC SHA cryptanalysis
15 on protocol protocol Process
16 When attacker breaks A's private key its universal Encrypt known Message Total Break Total Break
In SHA padding is done in such a way that the length of
17 message bits short of multiple of 512. 28 56 128 64 64
20 Kerbores is a____ protocol. Authenticati access system advance Authentication
21 In kerbores TGS stands for __ Ticket Grant Ticket Granting S Team Granting Team Granting Ticket Granting Server
22 In PKIX ___ relates to registration process. registration end entity registration er registration authority
4 The __ standard defines the structure of a digital certificate. X.109 TCP/IP ASN.1
25 ___is not a function performed by PKIX. registration revocation introduction introduction
attack attacker forges a signature for a particular universal Total Break
26 message chosen by attacker. forgery selective forge existential selective forgery
When attacker known senders public key and based on
27 that he attack is refered key only atte known message break forgery key only attack
28 not a element of public key cryptosystem. encryptio/dekey exchange digital signaturkey secrecy key secrecy
29 and attack attempts to use all possible Brute force MD5 SHA MD Brute force
maps a message of any length into fixed length value
30 as authenticator. hash functio message functior encryption decryption hash function
is a function of the message and a secret key that
31 produces a fixed length value as authenticator. MAC hash encryption signature clien MAC
32 ___is finger print or the summary of a message. encryption digest decryption me key digest message digest
33 SHA -1 produces hash value of __ bits. 160 256 384 512 160
34 SHA follows ____ step. padding append length divide input in all of the abov all of the above
1 Assurance Of data secracy is called Availability confidentiality integrity Authenticatior confidentiality
2 Assurance of no change in data during transmission is Authentication Availability integrity integrity
3 Assurance for available of data, resources to authorised usi Availability confidentiality integrity Authenticatior Availability
4 kind of attack. Release of Replay Denial of Masquerade Release of message conte!
5 is nota kind of passive attack. Release of Replay Traffic analyis evasdropping Replay
is method to encode plain text into cipher text. Enciphermer X.800 Digital Access Contro Encipherment
8 type of attack, attacker guesses all the possible pas cryptoanalys expression analy:symetric analy:brute force brute force
9 is not a type of attack on encrypted text. cipher text o plain text only chosen plain e: chosen cipheri plain text only
12 Key size of monoalphabetic algorithm 26 4 2 32 26
14 type of techniques original message id hidden in nc steganograp substitution transposition analysis steganography
16 DES algorithm have bits plain text block. 64 62 56 52 64
17 DES algorithm number of rounds. 4 12 16 22 16
18 key size of DES 64 62 56 52 56
19 In DES algorithm phase convert key into 48 bit. expansion key transformati key substitutio s- box transformation
20 The principle of ensures that the sender of a message authenticati availability access control non repudiatic non repudiation
21 The four primary security principles related to a message a conidentialit confidentiality, a authentication availabilty,acc: conidentiality,authenticati
22 In substitution cipher, the following happens: characters rows are replace columns are renon of the abc characters are replaced by
23 The process of writing the text as diagonals and reading it < Rail Fence te one time pad block cipher key cipher Rail Fence techniques
24 The matrix theory is technique. Hill cipher monoalphabetic Play fair vigenere Play fair
25 type of algorithm. symmetric asymetric both none of these asymetric
26 DES stands for___ Data Encrypi Data Encryption Data Encryptio Data Encryptic Data Encryption Standard
28 In___ attack person pretend as a authorized person. Masquared Logicbomb Horse Masquared
29 OFB stands for Output FeedOn Feedback Over Output Feedback
Consider plaintext " college" and key=2, find cipher text
32 In___ text from secret message are overwritten with penc character miinvisible ink pin punctures type writter marking
33 In____ key pair ( public and private) is used. asymetric symmetric both none of these asymetric
34 In____ type of algorithm two large prime numbers are selec RSA DES AES playfair RSA
2rs and uniform distribution of character
on,integrity,non repudiation