006 Cryptii-Online-Encryption
https://cryptii.com/

006 How-the-Enigma-Machine-Works
https://www.youtube.com/watch?v=G2_Q9FoD-oQ&ab_channel=Numberphile

006 The-Flaw-in-the-Enigma-Machine
https://www.youtube.com/watch?v=V4V2bpZlqx8&ab_channel=Numberphile

007 Plain-Text-Offenders
https://plaintextoffenders.com/

007 -have-i-been-pwned-
https://haveibeenpwned.com/Passwords

007 Most-Common-Passwords
https://en.wikipedia.org/wiki/List_of_the_most_common_passwords

007 Password-Complexity-Checker
http://password-checker.online-domain-tools.com/

012 Course-Fixes-Report-an-Issue
https://forms.gle/fpNEQooYBX25gcG67