On December 21, 2016, a manual of encryption and PC security tips was circulated on the pro-Islamic State (ISIS) channel. The manual was in the form of a PDF labeled “readme.” The guide offers step-by-step instructions on installing and using TrueCrypt – software that creates encrypted files on a computer – and CCleaner – a computer registry and junk-clearing utility – and also briefly covers making a kind of homemade fake weapon that “will weigh about 1-2 kg less than an AK47.”
In its introduction, the manual instructs readers: “Switch off your internet and install truecrypt and cclceaner… the reason for this is because I want you to encrypt the Jihad Trainer files and securely deleted the extracted and downloaded files correctly. This is to ensure you wipe any evidence off your device if you’re arrested.”
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