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信息安全工程师每日一练试题内容(2021/7/12)
试题1: 深度流检测技术是一种主要通过判断网络流是否异常来进行安全防护的网络安全技术,深度流检测系统通常不包括( )。 计算机犯罪是指利用信息科学技术且以计算机跟踪对象的犯罪行为,与其他类型的犯罪相比,具有明显的特征,下列说法中错误的是()
A、计算机犯罪具有隐蔽性
B、计算机犯罪具有高智能性,罪犯可能掌握一些其他高科技手段
C、计算机犯罪具有很强的破坏性
D、计算机犯罪没有犯罪现场
甲收到一份来自乙的电子订单后,将订单中的货物送达到乙时,乙否认自己曾经发送过这份订单,为了解除这种纷争,采用的安全技术是()
A、数字签名技术
B、数字证书
C、消息认证码
D、身份认证技术
(1)is the science of hiding information. Whereas the goal of cryptography is to make data unreadable by a third party. the goal of steganography is to hide the data from a third party. In this article, I will discuss what steganography is, what purposes it serves, and will provide an example using available software.
There are a large number of steganographic (2)that most of us are familiar with (especially if you watch a lot of spy movies), ranging from invisible ink and microdots to secreting a hidden message in the second letter of each word of a large body of text and spread spectrum radio communication. With computers and networks, there are many other ways of hiding informations, such as:
Covert channels (c,g, Loki and some distributed denial-of-service tools use the Internet Control (3)Protocol, or ICMP, as the communication channel between the “bad guy”and a compromicyed system)
Hidden text within Web pages
Hiding files in “plain sight”(c,g. what better place to “hide”a file than with an important sounding name in the c:\winnt system32 directory)
Null ciphers(c,g, using the first letter of each word to form a hidden message in an otherwise innocuous text)
steganography today, however, is significantly more (4)than the example about suggest, allowing a user to hide large amounts of information within image and audio. These forms of steganography often are used in conjunction with cryptography so the information is double protected; first it is encrypted and then hidden so that an advertisement first. find the information ( an often difficult task in and of itself) and the decrypted it.
The simplest approach to hiding data within an image file is called (5)signature insertion. In this method, we can take the binary representation of the hidden data and the bit of each byte within the covert image. If we are using 24-bit color the amount and will be minimum and indiscriminate to the human eye.
(1)A、Cryptography
B、Geography
C、Stenography
D、Steganography
(2)A、methods
B、software
C、tools
D、services
(3)A、Member
B、Management
C、Message
D、Mail
(4)A、powerful
B、sophistication
C、advanced
D、easy
(5)A、least
B、most
C、much
D、less
数字水印技术通过在数字化的多媒体数据中嵌入隐蔽的水印标记,可以有效地对数字多媒体数据的版权保护等功能。以下各项中,不属于数字水印在数字版权保护必须满足的基本应用需求的是()
A、安全性
B、隐蔽性
C、鲁棒性
D、可见性
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