A small group of Internet security specialists gathered in Singapore to start up a global system to make e-mail and e-commerce more secure, end the rapid growth of passwords and raise the bar significantly for Internet fraud, spies and troublemakers.
The Singapore event included an elaborate technical ceremony to create and then securely store numerical keys that will be kept in three hardened data centers there, in Zurich and in San Jose, Calif. The keys and data centers are working parts of a technology known as Secure DNS, or DNSSEC. DNS refers to the Domain Name System, which is a directory that connects names to numerical Internet addresses. Preliminary work on the security system had been going on for more than a year, but this was the first time the system went into operation, even though it is not quite complete.
The three centers are fortresses made up of five layers of physical, electronic and cryptographic security, making it virtually impossible to damage the system. Four layers are active now. The fifth, a physical barrier, is being built inside the data center.
The technology is viewed by many computer security specialists as a ray of hope amid the recent cascade of data thefts, attacks, disruptions and scandals, including break-ins at Citibank, Sony, Lockheed Martin, RSA Security and elsewhere. It allows users to communicate via the Internet with high confidence that the identity of the person or organization they are communicating with is not being tricked or forged.
Internet engineers like Dan Kaminsky, an independent network security researcher who is one of the engineers involved in the project, want to counteract three major deficiencies in today’s Internet. There is no mechanism for ensuring trust, the quality of software is uneven, and it is difficult to track down bad actors.
One reason for these flaws is that from the 1960s through the 1980s the engineers who designed the network’s underlying technology were concerned about reliable, rather than secure, communications. That is starting to change with the introduction of Secure DNS by governments and other organizations.
The event in Singapore capped a process that began more than a year ago and is expected to be complete after 300 so-called top-level domains have been digitally signed. Before the Singapore event, 70 countries had adopted the technology, and 14 more were added as part of the event. While large countries are generally doing the technical work to include their own domains in the system, the association of Internet security specialists is helping smaller countries and organizations with the process.
What would be the best title for the text（）
A. An Independent Net Security System Is Used
B. Secure DNS Has Grown Mature Nowadays
C. Secure DNS Will Become A Popular Technology
D. A Stronger Net Security System Is Under Way
参考答案：D
解析：
[试题类型] 主旨要义题。
[解题思路] 本题要求拟定文章的最佳标题(the best title)，故需对全文的行文脉络及主旨大意有清晰的把握。本文开宗明义，直奔主题：互联网安全专家启动一个全球性的互联网安全系统，以确保电子邮件和电子商务更为安全，终结密码数量不断增加，极大地增加了互联网欺诈、间谍活动和制造麻烦的难度。第二、三段对新安全系统的技术细节进行了说明。第四至六段说明了新的安全系统要解决的问题、现有网络的缺陷以及造成这些缺陷的原因。末段介绍了该系统的使用进展状况。综上所述，全文讨论的中心是“新的全球网络安全系统”，从其技术特点、功能作用以及使用状况等方面展开，四个选项中，最切合文意的是选项[D]。
[干扰排除] 选项[A]具有较强的干扰性，与原文不符的是independent，该词出现在第五段"Internet engineers like Dan Kaminsky, an independent..."，此处是指Dan Kaminsky独立网络工程师的身份，与新的网络发全系统无关，故排除选项[A]。选项[B]和选项[C]中的关键词都是Secure DNS，这是出现于第二段的一个专有名词，这只是整个网络安全系统涉及的一种技术，并不能概括全文的内容。此外，文章也并未就该技术是否成熟、是否流行做出评价，可见选项[B]和[C]并非本文主旨，故排除。