Exam (elaborations)
WGU C839 Objective Assessment Study (New 2024/ 2025 Update) Introduction to Cryptography| Guide with Qs & As| Grade A| 100% Correct (Verified Answers)
WGU C839 Objective Assessment Study
(New 2024/ 2025 Update) Introduction to
Cryptography| Guide with Qs & As| Grade
A| 100% Correct (Verified Answers)
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5. Exam (elaborations) - Wgu c839 objective assessment study (new 2024/ 2025 update) introduction to crypt...
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1. Exam (elaborations) - Wgu c839 objective assessment study (new 2024/ 2025 update) introduction to crypto...
2. Exam (elaborations) - Wgu c839 objective assessment study (new 2024/ 2025 update) introduction to crypt...
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WGUIC839IObjectiveIAssessmentIStudy
I(NewI2024/I2025IUpdate)IIntroductionItoI
Cryptography|IGuideIwithIQsI&IAs|IGradeI
A|I100%ICorrectI(VerifiedIAnswers)
QUESTION
HashIFunction
Answer:
-
OneIwayImathematicalIoperationIthatIreducesIaImessageIorIdataIfileIintoIaIsmallerIfixedIlengt
hIoutput,IorIHashIvalue.
-IOne-
WayImathematicalIoperationIthatIreducesIaImessageIorIdataIfileIintoIaIsmallerIfixedIlengthIout
putIaIfunctionIthatIisIdeterministicIbutIrandomizing,Ii.e.IwhoseIoutputIisIaIrelativelyIsmallIinte
gerIthatIappearsItoIbeIaIrandomIfunctionIofItheIkeyIvalue.
-AnIalgorithmIthatIproducesIaIfixed-lengthInumberIcalledIaIhashIorImessageIdigest
QUESTION
HashIValueIequation
Answer:
DI+IHAI=IHashIValue
DI=IVariableIDataIinputI(ofIanyIsize)
HAI=IHashIAlgorithm
HVI=IFixedIbitIstreamIoutput
QUESTION
TypesIofIHashIFunctions
Answer:
-MD5
-SHA1
-MD4
,-FORK-256
-RIPEMD160
-Gost
-TIGER
QUESTION
BitIsizeIforIMD5
Answer:
-128Ibits
QUESTION
BitIsizeIforISHA1
Answer:
-160Ibits
QUESTION
SaltingItheIHash
Answer:
-RefersItoItheIrandomIbutsIthatIareIusedIasIoneIofItheIinputsItoItheIhash
-TheIsaltIisIintermixedIwithItheImessageIthatIisItoIbeIhashed.
-VeryIeffectiveIagainstIrainbowIattacks
-
SaltIvalueIshouldIkeptIsecretIinIorderItoImaximizeIitsIpositiveIimpactIonItheIsecurityIofItheIse
cretIdata
QUESTION
RIPEMD-160
Answer:
-IRACEIIntergratedIPrimitivesIEvaluationIMessageIDigest
-DevelopedIbyIDobbertin,IBosselaersIandIPreneel
-AImessageIdigestIalgorithmIthatIproducesIaI160-
bitIhashIvalueIafterIperformingI160IroundsIofIcomputationsIonI512-bitIblocks.
-VariableILengthIBlocks
-DigestISize,I128,I160,I256,I320Ibits
QUESTION
,GOST
Answer:
-RussianInationalIstandardIGOSTIRI34.11-94
-HashIvalueIofI256Ibits
-ProcessesIaIvariable-lengthImessageIintoIaIfixedIlengthIoutputIofI256Ibits
QUESTION
TIGER
Answer:
-DesignedIbyIAndersonIandIBihamIinI1995
-HashIvalueIisI192Ibits
QUESTION
BinaryIMathIOperatons
Answer:
-IAND
-OR
-XORI(ExclusiveIOR)
QUESTION
BinaryIAND
Answer:
-IfIbothInumbersIhaveIaIoneIinItheIsameIplace,IthenItheIresultantInumberIisIaIone.I
-IfInotIthenIitIisIaIzero
1stInumberI-I1100
2ndInumberI-I0100
--------------------------
ResultI-I0100
QUESTION
BinaryIOR
Answer:
-ChecksItoIseeIwhetherIthereIisIaIoneIinIeitherIorIbothInumbersIinIaIgivenIplace.I
-IfIso,IthenItheIresultantInumberIisIone.I
-IfInot,ItheIresultantInumberIisIzero.
, 1stI-I1010
2ndI-I0100
==============
ResultI-I1110
QUESTION
BinaryIXOR
Answer:
-(ExclusiveIOR)
-
TheIbinaryIXORIoperationI(alsoIknownIasItheIbinaryIXORIfunction)IwillIalwaysIproduceIaI1I
outputIifIeitherIofIitsIinputsIisI1IandIwillIproduceIaI0IoutputIifIbothIofIitsIinputsIareI0IorI1.I
1stI-I1110
2ndI-I0101
==============
ResultI-I1011
-XORingIisIreversible.I
-IfIyouIXORItheIresultantInumberIwithItheIsecondInumber,IyouIgetIbackItheIfirstInumber.I
-
Conversely,IIfIyouIXORItheIresultantInumberIwithItheIfirstInumber,IyouIgetItheIsecondInumb
er.
QUESTION
WhatIareItheItwoIprocessesIofISymmetricIKeyIEncryption
Answer:
-Substitution
-Transposition
QUESTION
SubstitutionIprocess
Answer:
-IIsIaccomplishedIbyIXORingItheIplaintextImessageIwithItheIkey
QUESTION
TranspositionIprocess
Answer: