Next, Samudra discusses the process of scanning for Web sites vulnerable to hacking, then moves on to a three-page discussion on the basics of online credit card fraud and money laundering.
"This is hacking for dummies," said Evan F. Kohlmann, a U.S. consultant on international terrorism who also reviewed the chapter. "But in this day and age, you don't have to be an expert hacker to have a tremendous impact."
Samudra gestures as he enters a courtroom on Sept. 10, 2003, during his trial on charges of engineering the Bali nightclub bombings that killed more than 200 people.
(Divo Aditya -- AP)
Kohlmann and other cyberterrorism experts said the kind of online fraud preached by Samudra is becoming increasingly attractive as a source of funding for al Qaeda operatives in several regions of the world.
One of the chief hazards posed by Samudra's book is that it could direct religious extremists into the company of more accomplished hackers. Indonesian police assert their country now has more online credit card fraud than any other in the world.
"If you succeed at hacking and get into carding, be ready to make more money within three to six hours than the income of a policeman in six months," Samudra tells his readers. "But don't do it just for the sake of money."
He adds, "Remember, the main duty of Muslims is jihad in the name of God, to raise arms against the infidels, especially now the United States and its allies."
Samudra had first sought to finance the Bali nightclub attacks by ordering the robbery of a shop selling gold jewelry in western Java. The heist allegedly netted five pounds of gold and $500. Then he turned to more lucrative targets on the Internet, police and prosecutors said.
At Samudra's trial, police testified that his computer had been used to communicate in chat rooms with others involved in online credit card fraud and contained information on ways to obtain credit card details.
Petrus Reinhard Golose, head of cybercrimes investigations for the Indonesian police, said in an interview that Samudra had asked for religious permission to conduct carding from Abubakar Baasyir, the radical cleric and alleged head of Jemaah Islamiah now on trial in Jakarta in connection with terrorist bombings, including the one in Bali. Golose said police did not know whether Baasyir had blessed Samudra's Internet activities.
Special correspondent Noor Huda Ismail contributed to this report.