6.10. In August 2011, the Hong Kong Stock Exchange (HKEx) suspended trading for seven stocks after its news announcement website HKExnews was hit by a distributed denial-of-service (DoS) attack. This site is the only online platform used by HKEx to make announcement of the listed companies, and for their regulatory filings. There were 1,463 listed companies, and 5,712 other types of securities, including warrants and bonds. The affected stock included HSBC, Cathay Pacific, and the Hong Kong exchange itself. These stocks have a combined market value of HK$1.5 trillion. The companies tried to make price-sensitive announcements during the lunchtime trading break but due to the attack, the announcements failed to reach the investors. The trading system was not affected but investors rely on timely financial information posted on the HKExnews website to make investment decision. After investigations, the law en- forcement department arrested a businessman for the attack. He was sentenced to nine months in jail. Later, there were discussions on the suspension policies and Internet security measures of the Hong Kong Stock Exchange, as such attack could be carried out by anyone easily and its consequence was serious. REQUIRED a. What is a DoS attack? b. What can HKEx do to reduce the impact from a DoS attack?
6.10. In August 2011, the Hong Kong Stock Exchange (HKEx) suspended trading for seven stocks after its news announcement website HKExnews was hit by a distributed denial-of-service (DoS) attack. This site is the only online platform used by HKEx to make announcement of the listed companies, and for their regulatory filings. There were 1,463 listed companies, and 5,712 other types of securities, including warrants and bonds. The affected stock included HSBC, Cathay Pacific, and the Hong Kong exchange itself. These stocks have a combined market value of HK$1.5 trillion. The companies tried to make price-sensitive announcements during the lunchtime trading break but due to the attack, the announcements failed to reach the investors. The trading system was not affected but investors rely on timely financial information posted on the HKExnews website to make investment decision. After investigations, the law en- forcement department arrested a businessman for the attack. He was sentenced to nine months in jail. Later, there were discussions on the suspension policies and Internet security measures of the Hong Kong Stock Exchange, as such attack could be carried out by anyone easily and its consequence was serious. REQUIRED a. What is a DoS attack? b. What can HKEx do to reduce the impact from a DoS attack?
Chapter1: Taking Risks And Making Profits Within The Dynamic Business Environment
Section: Chapter Questions
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Transcribed Image Text:6.10. In August 2011, the Hong Kong Stock Exchange (HKEx) suspended trading for
seven stocks after its news announcement website HKExnews was hit by a distributed
denial-of-service (DoS) attack. This site is the only online platform used by HKEx to
make announcement of the listed companies, and for their regulatory filings. There
were 1,463 listed companies, and 5,712 other types of securities, including warrants
and bonds. The affected stock included HSBC, Cathay Pacific, and the Hong Kong
exchange itself. These stocks have a combined market value of HK$1.5 trillion. The
companies tried to make price-sensitive announcements during the lunchtime trading
break but due to the attack, the announcements failed to reach the investors. The trading
system was not affected but investors rely on timely financial information posted on
the HKExnews website to make investment decision. After investigations, the law en-
forcement department arrested a businessman for the attack. He was sentenced to nine
months in jail. Later, there were discussions on the suspension policies and Internet
security measures of the Hong Kong Stock Exchange, as such attack could be carried
out by anyone easily and its consequence was serious.
REQUIRED
a. What is a DoS attack?
b. What can HKEx do to reduce the impact from a DoS attack?
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