最新的EC-COUNCIL Certified Encryption Specialist - 212-81免費考試真題
問題1
The reverse process from encoding - converting the encoded message back into its plaintext format.
正確答案: C
說明：（僅 VCESoft 成員可見）
問題2
A method for cracking modern cryptography. The attacker obtains the cipher texts corresponding to a set of plain texts of own choosing. Allows the attacker to attempt to derive the key. Difficult but not impossible.
正確答案: D
說明：（僅 VCESoft 成員可見）
問題3
How does Kerberos generate the first secret key in the authentication process?
正確答案: B
問題4
Which component of IPsec performs protocol-level functions that are required to encrypt and decrypt the packets?
正確答案: B
說明：（僅 VCESoft 成員可見）
問題5
The ATBASH cipher is best described as what type of cipher?
正確答案: D
說明：（僅 VCESoft 成員可見）
問題6
John is going to use RSA to encrypt a message to Joan. What key should he use?
正確答案: D
說明：（僅 VCESoft 成員可見）
問題7
A ______ refers to a situation where two different inputs yield the same output.
正確答案: D
說明：（僅 VCESoft 成員可見）
問題8
3DES can best be classified as which one of the following?
正確答案: B
說明：（僅 VCESoft 成員可見）
問題9
Original, unencrypted information is referred to as ____.
正確答案: C
說明：（僅 VCESoft 成員可見）
問題10
Used to take the burden off of a CA by handling verification prior to certificates being issued. Acts as a proxy between user and CA. Receives request, authenticates it and forwards it to the CA.
正確答案: A
說明：（僅 VCESoft 成員可見）
問題11
Part of understanding cryptography is understanding the cryptographic primitives that go into any crypto system. A(n) _______ is a fixed-size input to a cryptographic primitive that is random or pseudorandom.
正確答案: B
說明：（僅 VCESoft 成員可見）
問題12
What is a "Collision attack" in cryptography?
正確答案: B
說明：（僅 VCESoft 成員可見）
問題13
Encryption of the same plain text with the same key results in the same cipher text. Use of an IV that is XORed with the first block of plain text solves this problem.
正確答案: C
說明：（僅 VCESoft 成員可見）
