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yay -Sy xortool

echo "my msg" | xortool-xor -r secretkey -f - > shhh.txt

[ YOU CAN ALSO SET YOURKEY SECRET KEY IN HEX FORM ]

echo "my msg" | xortool-xor -h 01 -f - > shhh.txt

UNHIDE

xortool-xor -r secretkey -f shhh.txt

[ OR ]

xortool-xor -h 01 -f lol.txt