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信息安全工程師每日一練試題(2024/2/21)

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信息安全工程師每日一練試題內(nèi)容(2024/2/21)

  • 試題1

    甲不但懷疑乙發(fā)給他的被人篡改,而且懷疑乙的公鑰也是被人冒充的,為了消除甲的疑慮,甲和乙決定找一個(gè)雙方都信任的第三方來(lái)簽發(fā)數(shù)字證書(shū),這個(gè)第三方為()
    A、國(guó)際電信聯(lián)盟電信標(biāo)準(zhǔn)分部(ITU-T)
    B、國(guó)家安全局(NSA)
    C、認(rèn)證中心(CA)
    D、國(guó)家標(biāo)準(zhǔn)化組織(ISO)

    查看答案

    試題參考答案:C

    試題解析與討論:www.pokkc.com/st/2847915378.html

  • 試題2

    在訪問(wèn)因特網(wǎng)時(shí),為了防止WEB頁(yè)面中惡意代碼對(duì)自己計(jì)算機(jī)的損害,可以采取的防范措施是(  )。
    A.將要訪問(wèn)的Web站點(diǎn)按其可信度分配到瀏覽器的不同安全區(qū)域
    B.利用SSL訪問(wèn)Web站點(diǎn)
    C.在瀏覽器中安裝數(shù)字證書(shū)
    D.利用IP安全協(xié)議訪問(wèn)Web站點(diǎn)

    查看答案

    試題參考答案:A

    試題解析與討論:www.pokkc.com/st/3894514090.html

  • 試題3

    The modern study of symmetric-key ciphers relates mainly to the study of block ciphers and stream ciphers and to their applications. A block cipher is, in a sense, a modern embodiment of Alberti's polyalphabetic cipher: block ciphers take as input a block of (71 )and a key, and output a block of ciphertext of the same size. Since messages are almost always longer than a single block, some method of knitting together successive blocks is required. Several have been developed, some with better security in one aspect or another than others. They are the mode of operations and must be carefully considered when using a block cipher in a cryptosystem.
    The Data Encryption Standard (DES) and the Advanced Encryption Standard (AES) are( 72 )designs which have been designated cryptography standards by the US government (though DES's designation was finally withdrawn after the AES was adopted). Despite its deprecation as an official standard, DES (especially its still-approved and much more secure triple-DES variant) remains quite popular; it is used across a wide range of applications, from ATM encryption to e-mail privacy and secure remote access. Many other block ciphers have been designed and released, with considerable variation in quality. Many have been thoroughly broken. See Category: Block ciphers.
    Stream ciphers, in contrast to the ‘block’ type, create an arbitrarily long stream of key material, which is combined ( 73 )the plaintext bit-by-bit or character-by-character, somewhat like the one-time pad. In a stream cipher, the output( 74 )is created based on an internal state which changes as the cipher operates. That state change is controlled by the key, and, in some stream ciphers, by the plaintext stream as well. RC4 is an example of a well-known, and widely used, stream cipher; see Category: Stream ciphers.
    Cryptographic hash functions (often called message digest functions) do not necessarily use keys, but are a related and important class of cryptographic algorithms. They take input data (often an entire message), and output a short fixed length hash, and do so as a one-way function. For good ones, ( 75 ) (two plaintexts which produce the same hash) are extremely difficult to find.
    Message authentication codes (MACs) are much like cryptographic hash functions, except that a secret key is used to authenticate the hash value on receipt. These block an attack against plain hash functions.
    (71)
    A.plaintext
    B.ciphertext
    C.data
    D.hash
    (72)
    A.stream cipher
    B.hash function
    C.Message authentication code
    D.Block cipher
    (73)
    A.of
    B.for
    C.with
    D.in
    (74)
    A.hash
    B.stream
    C.ciphertext
    D.plaintext
    (75)
    A.collisions
    B.image
    C.preimage
    D.solution

    查看答案

    試題參考答案:A、D、C、B、A

    試題解析與討論:www.pokkc.com/st/4115223167.html

  • 試題4

    按照行為和功能特性,特洛伊木馬可以分為遠(yuǎn)程控制型木馬、信息竊取型木馬和破壞型木馬等。以下不屬于遠(yuǎn)程控制型木馬的是()。
    A、冰河
    B.彩虹橋
    C.PC Share
    D.Trojan-Ransom

    查看答案

    試題參考答案:D

    試題解析與討論:www.pokkc.com/st/5020812505.html

  • 試題5

    中間人攻擊就是在通信雙方毫無(wú)察覺(jué)的情況下,通過(guò)攔截正常的網(wǎng)絡(luò)通信數(shù)據(jù),進(jìn)而對(duì)數(shù)據(jù)進(jìn)行嗅探或篡改。以下屬于中間人攻擊的是(  )。
    A.DNS欺騙
    B.社會(huì)工程攻擊
    C.網(wǎng)絡(luò)釣魚(yú)
    D.旁注攻擊

    查看答案

    試題參考答案:A

    試題解析與討論:www.pokkc.com/st/411318971.html

  • 試題6

    2017年11月,在德國(guó)柏林召開(kāi)的第55次ISO/IEC信息安全分技術(shù)委員會(huì)(SC27)會(huì)議上,我國(guó)專(zhuān)家組提出的(  )算法一致通過(guò)成為國(guó)際標(biāo)準(zhǔn)。
    A.SM2與SM3
    B.SM3與SM4
    C.SM4與SM9
    D.SM9與SM2

    查看答案

    試題參考答案:D

    試題解析與討論:www.pokkc.com/st/3895519670.html

  • 試題7

    IPSec屬于(  )的安全解決方案。
    A.網(wǎng)絡(luò)層
    B.傳輸層
    C.應(yīng)用層
    D.物理層

    查看答案

    試題參考答案:A

    試題解析與討論:www.pokkc.com/st/4113621566.html

  • 試題8

    針對(duì)電子郵件的安全問(wèn)題,人們利用PGP(Pretty Good Privacy)來(lái)保護(hù)電子郵件的安全。以下有關(guān)PGP的表述,錯(cuò)誤的是(  )。
    A.PGP的密鑰管理采用RSA
    B.PGP的完整性檢測(cè)采用MD5
    C.PGP的數(shù)字簽名采用RSA
    D.PGP的數(shù)據(jù)加密采用DES

    查看答案

    試題參考答案:D

    試題解析與討論:www.pokkc.com/st/5736221460.html

  • 試題9

    面向身份信息的認(rèn)證應(yīng)用中,最常用的認(rèn)證方法是()
    A、基于數(shù)據(jù)庫(kù)的認(rèn)證
    B、基于摘要算法認(rèn)證
    C、基于PKI認(rèn)證
    D、基于賬戶(hù)名/口令認(rèn)證

    查看答案

    試題參考答案:D

    試題解析與討論:www.pokkc.com/st/2844823243.html

  • 試題10

    電子郵件系統(tǒng)的郵件協(xié)議有發(fā)送協(xié)議SMTP和接收協(xié)議POP3/IMAP4。SMTP發(fā)送協(xié)議中,發(fā)送身份標(biāo)識(shí)的指令是(  )。
    A. SEND
    B. HELP
    C. HELO
    D. SAML

    查看答案

    試題參考答案:C

    試題解析與討論:www.pokkc.com/st/4110916654.html

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