MB of free space was required. However, version 3.0 was not compatible with Mac OS X 10.4, or "Tiger". Version 4.0 Version 4.0 was released on December 18, 2008. Symantec marketed a bundle of Version 4.0 and the 2009 version for Windows, intended for users with both Microsoft Windows and Mac OS X installed. iClean was dropped from this release. The firewall now blocked access to malicious sites using a blacklist updated by Symantec. To prevent attackers from leveraging insecurities in the Mac or installed software, exploit protection was introduced* ". Phishing protection was introduced* " as well. Mac OS X 10.4.11 or higher was supported. A PowerPC or Intel Core processor, 256 MB of RAM and 150 MB of free space were required. Criticism of versions before 2009 FBI cooperation Symantec, in compliance with the Federal Bureau of Investigation (FBI), whitelisted Magic Lantern, an FBI keylogger. The purpose of Magic Lantern was to obtain passwords to encrypted e-mail as part of a criminal investigation. Magic Lantern was first reported on November 20, 2001. Magic Lantern was deployed as an e-mail attachment. When the attachment was opened, a trojan horse was installed on the suspect's computer. The Trojan horse was activated when the suspect used PGP encryption, often used to increase the security of sent e-mail messages. When activated, the trojan horse will log the PGP password, which allowed the FBI to decrypt user communications. Symantec and other major antivirus vendors whitelisted Magic Lantern. Concerns included uncertainties about Magic Lantern's full potential and whether hackers could subvert it for purposes outside the law. Graham Cluley, a technology consultant from Sophos, said, "We have no way of knowing if it was written by the FBI, and even if we did, we wouldn’t know whether it was being used by the FBI or if it had been commandeered by a third party". Another reaction came from Marc Maiffret, chief technical officer and cofounder of eEye Digital Security, "Our customers are paying us for a service, to protect them from all forms of malicious code. It is not up to us to do law enforcement's job for them so we do not, and will not, make any exceptions for law enforcement malware or other tools." FBI spokesman Paul Bresson, in response to the question of whether Magic Lantern needed a court order to be deployed, said, "Like all technology projects or tools deployed