There are broadly two kinds of cyber crimes. Firstly, the conventional kind of crimes are sometimes caused by using computers. The second kind of cyber crime are those crimes where the computer is besieged.

The types of cyber crime may be succinctly stated as under:

• cyber pornography
• email (Nigerian scam , email bombing)
• salami attack
• web defacement
• defamation
• credit card crimes
• email spoofing
• denial of service attacks (DOS & DDOS)
• virus , Trojan , key loggers
• cyber terrorism
• phishing

• email headers
• whois search
• ip tracing
• password breaking
• web crawling
• using google as advanced search engine
• packet sniffing
• port scanning