LDC: http://www.ldc.lu.se/tjanster/it-sakerhet

SUNET: https://www.sunet.se/policy-for-tillaten-anvandning/

Make sure the password fullfills these criteria:

• must be at least 10 characters
• must contain one or more one lowercase and one uppercase letter
• must contain one or more number and/or symbol
• suggestion: use a passphrase along the lines of this comic: https://xkcd.com/936/
  DO NOT USE THE SAME PASSWORD IN THE COMIC STRIP AT THE LINK
• CERN has very good suggestions regarding passwords: https://security.web.cern.ch/recommendations/en/passwords.shtml

Read this nice infographic (credit: https://www.teamsid.com/the-importance-of-having-a-secure-password-infographic/)