以下哪一项是和电子邮件系统无关的？（）A、PEM（Privacy enhanced mail）B、PGP（Pretty good privacy）C、X.500D、X.400
以下哪一项是和电子邮件系统无关的？（）
- A、PEM（Privacy enhanced mail）
- B、PGP（Pretty good privacy）
- C、X.500
- D、X.400
相关考题：
下列关于PGP(Pretty Good Privacy)的说法，正确的是(32)。A．PGP对电子邮件的认证机制是用MD5算法产生256位的报文摘要B．PGP既有IDEA算法的保密性，又有RSA体系的快捷性C．PGP发送方用自己的RSA私钥对报文摘要和会话密钥进行加密D．PGP的会话密钥是一次性使用的，而文件是用会话密钥加密的
下列关于PGP(Pretty Good Privacy)的说法，错误的是(32)。A．PGP可用于电子邮件，也可以用于文件存储B．PGP不可使用IDEA对称加密算法C．PGP采用了ZIP数据压缩算法D．PGP可选用MD5和SHA两种Hash算法
下列关于PGP(Pretty Good Privacy)的说法中不正确的是(51)。A．PGP可用于电子邮件，也可以用于文件存储B．PGP可选用MD5 SHA两种Hash算法C．PGP采用了ZIP数据压缩算法D．PGP不可使用IDEA加密算法
以下关于PGP(Pretty Good Privacy)软件叙述错误的是：()。A.PGP可以实现对邮件的加密、签名和认证B.PGP可以实现数据压缩C.PGP可以对邮件进行分段和重组D.PGP采用SHA算法加密邮件
下列关于PGP(Pretty Good Privacy)的说法，错误的是(37)。A．PGP可用于电子邮件，也可以用于文件存储B．PGP不可使用IDEA对称加密算法C．PGP采用了ZIP数据压缩算法D．POP可选用MD5和SHA两种Hash算法
PGP（Pretty Good Privacy）是一种电子邮件加密软件包，它提供数据加密和数字签名两种服务，采用 （42） 进行身份认证，使用 （43） （12位密钥）进行数据加密，使用 （44） 进行数据完整性验证。A.RAS公钥证书B.RAS私钥证书C.Kerberos证书D.DES私钥证书
Text 2 Internet service providers have realized that they are sitting on a treasure chest of data about your online activities that they could be selling to advertisers.Recognizing the privacy threat,the Federal Communications Commission adopted rules that would have stopped them from doing so without your consent,but Congress recently shot down the regulation.This is a big deal.Privacy doesn't merely benefit individuals;it fundamentally shapes how society functions.It is crucial for marginalized communities and for social movements.Privacy enables these groups to network,organize,and develop their ideas before challenging the status quo.But when people know they're being tracked and monitored,they change their behavior.This chilling effect hurts our intellectual freedoms and our capacity for social progress.The data that tracks our behavior feeds into machine-learning algorithms that make judgments about us.When used for advertising,they can reproduce our own prejudiced behavior.Marketers can use machine learning to figure out your unique features-do you resDond better to words or to pictures?Do you make impulsive shopping decisions?-to target you with exactly the advertisement that will best persuade you.When consequential decisions about employment or loans are made using this kind of data,the result can feel absurd and incomprehensible,because these systems aren't programmed to explain their decisions.There aren't yet effective ways for humans to hold algorithms accountable for how they categorize us.The good news is how effective technology can be in preventing tracking.We found that ad blockers and other browser-privacy tools can decrease tracking by 80 percent or more.More complex tools can be even more effective.In other worcls,the more technically savvy among us can enjoy dramatically better privacy and digital freedoms.But this has resulted in a technological"arms race,"which is worrying by itself,but also because such technical skill correlates with historically advantaged groups.Meanwhile,publishers are caught in the ad-blocking crossfire,endangering the free press.One bright spot is that online privacy research has had a tremendous effect.It has helped regulators curb the worst of the offenses,forced companies to roll back invasions because of public-relations pressure,spurred the development of privacy tools,and developed a healthy public debate about online tracking.The fight for privacy is now closely linked to the fight for digital civil liberties and democratic values,and it is a movement that includes activists,artists,journalists,researchers,and everyday users of technology.There's tremendous power in your hands to take charge of your own privacy as well as foster these societal values.Online privacy research has had a tremendous effect by____.A.providing evidence to regulatorsB.fining companies for invasionsC.designing privacy toolsD.raising public awareness
PGP(Pretty Good Privacy)是一种电子加密软件包，它提供数据加密和数字签名两种服务，采用（本题）进行身份验证，使用（ ）（128位密钥）进行数据加密，使用（ ）进行数据完整性验证。A.A.RSA公钥证书B.RSA私钥证书C.Kerboros证书D.DES私钥证书
PGP(Pretty Good Privacy)是一种电子加密软件包，它提供数据加密和数字签名两种服务，采用（ ）进行身份验证，使用（ ）（128位密钥）进行数据加密，使用（本题）进行数据完整性验证。A.HASHB.MD5C.三重DESD.SHA-1
PGP(Pretty Good Privacy)是一种电子加密软件包，它提供数据加密和数字签名两种服务，采用（ ）进行身份验证，使用（本题）（128位密钥）进行数据加密，使用（ ）进行数据完整性验证。A.IDEAB.RSAC.DESD.Diffie-Hellman
有关PGP（Pretty Good Privacy）的叙述，下列哪些正确？（）A、PGP是一种电子邮件加密策略B、PGP软件会为用户产生一对金钥，一把是私人钥匙，一把是公开钥匙C、当要传送一封保密信或档案给对方时，首先必须先取得对方的私人钥匙D、当要传送一封保密信或档案给对方时，首先必须先取得对方的公开钥匙
多选题有关PGP（Pretty Good Privacy）的叙述，下列哪些正确？（）APGP是一种电子邮件加密策略BPGP软件会为用户产生一对金钥，一把是私人钥匙，一把是公开钥匙C当要传送一封保密信或档案给对方时，首先必须先取得对方的私人钥匙D当要传送一封保密信或档案给对方时，首先必须先取得对方的公开钥匙
单选题PGP（Pretty Good Privacy）是一个主要基于（）密码算法的供大众使用的加密软件。ADESBIDEACRSADMD5