"I honestly think that the general "script kiddie" crowd is more familiar and comfortable on an Intel processor versus a PowerPC," said Finisterre. Simply moving from the 4-byte instructions that PowerPCs use to the 1-byte instructions Intel processors use lowers the bar for exploits, he added. Certain techniques that couldn't be used on PowerPC Macs, such as exploiting unicode-based buffers, are commonly used to target Intel-based machines, said Finisterre.
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News source: CRN