信息安全工程師考試科目共有兩科：《基礎(chǔ)知識》、《應(yīng)用技術(shù)》，一般我們也習慣性稱為“綜合知識”和“案例分析”。其中《基礎(chǔ)知識》為單項選擇題，共75道，最后5道題為英語題。《應(yīng)用技術(shù)》為問答題，一般4-5道，每道試題3-4個問題。

考試方式：信息安全工程師考試兩科都是采用筆試、閉卷方式進行，在一天內(nèi)考完，上午考綜合知識，下午考案例分析?？荚噷嵭腥珖y(tǒng)一大綱、統(tǒng)一試題、統(tǒng)一時間，兩科總分均為75分，合格標準一般為45分?？荚嚦煽儾挥璞Ａ?，必須要全部及格才能拿到證書。

信息安全工程師的英語題還是有些難度的，大家可以做一下這5道真題。

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)designs which have been designated cryptography standards by the US government (though DES's designation was finally withdrawn after the AES was adopted).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.collisons

B.image

C.preimage

D.solution

信管網(wǎng)參考答案：

71.A   72.D   73.C   74.B   75.C