The planned bombings were 'Plan B' if he could not make it to Iraq to fight with the self-proclaimed Islamic State.
The blog, which has since been deleted, was written under the pseudonym, Abdullah al-Australi, the same name used by Jake Bilardi.
Its veracity could not be confirmed; however references to aspects of the writer’s upbringing and personal life appear to match accounts given by his family and former acquaintances.
The writer describes his life growing up in Melbourne’s working class suburbs, and says he had "dreamed of becoming a political journalist."
He describes how his fascination with Islamic groups after the September 11 attacks drove him to extensive "research" online. He even credits the Victorian government’s laptops-in-schools programme with allowing him to continue his "research" in "otherwise boring classes".
Through his reading, the writer claims he came to see violent Islamist militant groups as oppressed freedom fighters, and became certain that "violent global revolution was the answer to the world’s ills".
"Finally, I made contact with a brother online who promised to bring me across the border, it was a risky decision to trust someone online but I was desperate to leave and was confident the brother was genuine," he wrote.
"Fearing possible attempts by the increasingly-intrusive authorities in Australia to prevent my departure I began drawing up a Plan B, [which] involved launching a string of bombings across Melbourne, targeting foreign consulates and political/military targets as well as grenade and knife attacks on shopping centres and cafes and culminating with myself detonating a belt of explosives."
The writer claims he began collecting materials for explosives, but says he was concerned the purchase of chemicals needed for bomb-making would attract the attention of Australian authorities.
"I ceased the planning of Plan B and sat waiting until everything was prepared and I could exit the country undetected," he said.
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