WGU C839 -
g g
Intro to Cryptography Exam Questions and Answers
g g g g g g g
2023 - 2024 (Verified Answers)
g g g g
1. Whatgtypegofgencryptiongusesgdifferentgkeysgtogencryptgandgdecryptgtheg
message?
AgSymmetricg
BgPrivategkeyg
CgSecure
DgAsymmetricgANSgD
2. Thegmostgwidelygusedgasymmetricgencryptiongalgorithmgisgwhat?
AgRSA
BgVigenereg
CgDES
DgCaesargCiphergANSgA
3. Original,gunencryptedginformationgisgreferredgtogasggggggg .
Agtext
,Bgplaintextg
Cgcleantext
DgciphertextgANSgB
4. WhichgofgthegfollowinggisgNOTgangasymmetricgsystem?
AgPGPg
BgRSAg
CgSSL
DgDESgANSgD
5. IngordergforgUsergAgtogsendgUsergBgangencryptedgmessagegthatgonlygUsergBg
cangread,gUsergAgmustgencryptgmessagegwithgwhichgofgthegfollowinggkeys?
AgUsergA'sgpublicgkeyg
BgUsergA'sgprivategkeyg
CgUsergB'sgpublicgkey
DgUsergB'sgprivategkeygANSgC
6. Theggreatestgweaknessgwithgsymmetricgalgorithmsgis .
AgTheygareglessgsecuregthangasymmetricgB
Thegproblemgofgkeygexchange
g
,CgTheygaregslowergthangasymmetricg
DgThegproblemgofggeneratinggkeysgA
NSgB
7. Whichgofgthegfollowinggisggenerallygtruegaboutgblockgsizes?
AgSmallergblockgsizesgincreasegsecurity
BgBlockgsizesgmustgbegmoregthang256gbitsgtogbegsecureg
CgBlockgsizegisgirrelevantgtogsecurity
DgLargergblockgsizesgincreasegsecuritygANSgD
8. A isgagfunctiongthatgtakesgagvariable-
sizeginputgmgandgreturnsgagfixed-sizegstring.
AgSymmetricgcipherg
BgHash
CgAsymmetricgcipherg
DgFeistelgANSgB
9. Whichgofgthegfollowinggisgagcryptographicgprotocolgthatgallowsgtwogpartiesg
togestablishgagsharedgkeygoverganginsecuregchannel?
AgEllipticgCurveg
BgRSA
CgMD5
DgDiffie-HellmangANSgD
10. A
isgagdigitalgrepresentationgofginformationgthatgidentifiesgyougasgagrelevantg
, entitygbygagtrustedgthirdgparty?
AgDigitalgSignatureg
BgHash
CgOwnershipgstampg
DgDigestgANSgA
11. Whatgisgthegstandardgusedgbygmostgdigitalgcertificates?
AgX.509g
BgCRL
CgRFCg2298g
DgOCSPgAN
SgA
12. DESgusesgkeysgofgwhatgsize?
g g
Intro to Cryptography Exam Questions and Answers
g g g g g g g
2023 - 2024 (Verified Answers)
g g g g
1. Whatgtypegofgencryptiongusesgdifferentgkeysgtogencryptgandgdecryptgtheg
message?
AgSymmetricg
BgPrivategkeyg
CgSecure
DgAsymmetricgANSgD
2. Thegmostgwidelygusedgasymmetricgencryptiongalgorithmgisgwhat?
AgRSA
BgVigenereg
CgDES
DgCaesargCiphergANSgA
3. Original,gunencryptedginformationgisgreferredgtogasggggggg .
Agtext
,Bgplaintextg
Cgcleantext
DgciphertextgANSgB
4. WhichgofgthegfollowinggisgNOTgangasymmetricgsystem?
AgPGPg
BgRSAg
CgSSL
DgDESgANSgD
5. IngordergforgUsergAgtogsendgUsergBgangencryptedgmessagegthatgonlygUsergBg
cangread,gUsergAgmustgencryptgmessagegwithgwhichgofgthegfollowinggkeys?
AgUsergA'sgpublicgkeyg
BgUsergA'sgprivategkeyg
CgUsergB'sgpublicgkey
DgUsergB'sgprivategkeygANSgC
6. Theggreatestgweaknessgwithgsymmetricgalgorithmsgis .
AgTheygareglessgsecuregthangasymmetricgB
Thegproblemgofgkeygexchange
g
,CgTheygaregslowergthangasymmetricg
DgThegproblemgofggeneratinggkeysgA
NSgB
7. Whichgofgthegfollowinggisggenerallygtruegaboutgblockgsizes?
AgSmallergblockgsizesgincreasegsecurity
BgBlockgsizesgmustgbegmoregthang256gbitsgtogbegsecureg
CgBlockgsizegisgirrelevantgtogsecurity
DgLargergblockgsizesgincreasegsecuritygANSgD
8. A isgagfunctiongthatgtakesgagvariable-
sizeginputgmgandgreturnsgagfixed-sizegstring.
AgSymmetricgcipherg
BgHash
CgAsymmetricgcipherg
DgFeistelgANSgB
9. Whichgofgthegfollowinggisgagcryptographicgprotocolgthatgallowsgtwogpartiesg
togestablishgagsharedgkeygoverganginsecuregchannel?
AgEllipticgCurveg
BgRSA
CgMD5
DgDiffie-HellmangANSgD
10. A
isgagdigitalgrepresentationgofginformationgthatgidentifiesgyougasgagrelevantg
, entitygbygagtrustedgthirdgparty?
AgDigitalgSignatureg
BgHash
CgOwnershipgstampg
DgDigestgANSgA
11. Whatgisgthegstandardgusedgbygmostgdigitalgcertificates?
AgX.509g
BgCRL
CgRFCg2298g
DgOCSPgAN
SgA
12. DESgusesgkeysgofgwhatgsize?
