diff --git a/.DS_Store b/.DS_Store new file mode 100644 index 0000000..5aebb0f Binary files /dev/null and b/.DS_Store differ diff --git a/unit00_introduction/esecurity_introduction.pdf b/unit00_introduction/unit01_introduction.pdf similarity index 100% rename from unit00_introduction/esecurity_introduction.pdf rename to unit00_introduction/unit01_introduction.pdf diff --git a/unit00_introduction/esecurity_introduction.pptx b/unit00_introduction/unit01_introduction.pptx similarity index 100% rename from unit00_introduction/esecurity_introduction.pptx rename to unit00_introduction/unit01_introduction.pptx