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单选题
Which Public Key Cryptographic Standards （PKCS） defines the syntax for encrypted messages andmessages with digital signatures？（）
A
PKCS #7
B
PKCS #8
C
PKCS #10
D
PKCS #12
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WhichPublicKeyCryptographicStandards(PKCS)definesthesyntaxforencryptedmessagesandmessageswithdigitalsignatures?()
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多选题Which of the following statements that describe Diffie Hellman Key exchange are correct？ （）AA DH key exchange is an algorithm that utilizes asymmetric cryptographic keys.BThe DH key exchange is used to establish a shared secret over an insecure medium during an IPSec phase 1 exchange.CThe DH exchange is susceptible to man-in-the-middle attacks.DThe DH exchange is used to authenticate the peer device duringan IPSec phase 1 exchange.EA DH exchange provides Perfect Forward Secrecy （PFS）.
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HTTP Basic AuthenticationB
Form Based AuthenticationC
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多选题Which two statements about the Diffie-Hellman （DH） key exchange process are correct？（）AIn the DH key exchange process， the session key is never passed across the network.BIn the DH key exchange process， the public and private keys are mathematically related using the DH algorithm.CIn the DH key exchange process， the session key is passed across the network to the peer for confirmation.DIn the DH key exchange process， the public and private keys are not mathematically related， ensuring higher security
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多选题Which two statements about the Diffie-Hellman (DH) key exchange process are correct? （）(Choose two.)AIn the DH key exchange process, the session key is never passed across the network.BIn the DH key exchange process, the public and private keys are mathematically related using the DH algorithm.CIn the DH key exchange process, the session key is passed across the network to the peer for confirmation.DIn the DH key exchange process, the public and private keys are not mathematically related, ensuring higher security
考题
单选题Which constraint can be defines only at the column level? （）A
UNIQUEB
NOT NULLC
CHECKD
PRIMARY KEYE
FOREIGN KEY
考题
单选题Which statement is true about a certificate authority？（）A
An entity responsible for registering the private key encryption used in a PKIB
An agency responsible for granting and revoking public-private key pairsC
A trusted third party responsible for signing the public keys of entities in a PKIbased systemD
A trusted third party responsible for signing the private keys of entities in a PKIbased system
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多选题public class Key { private long id1； private long 1d2； // class Key methods } A programmer is developing a class Key， that will be used as a key in a standard java.util.HashMap. Which two methods should be overridden to assure that Key works correctly as a key？（）Apublic int hashCode（）Bpublic boolean equals（Key k）Cpublic int compareTo（Object o）Dpublic boolean equals（Object o）Epublic boolean compareTo（Key k）
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