# ISM password policy — minimum length, applicability NC, OS, P # # Source: ACSC ISM OSCAL catalogue v2026.09.4 # ism-0421 single-factor passwords are a minimum of 15 characters (NC, OS, P) # # This is a pure character count: debian-13-pwquality-no-complexity sets every # credit to 0, so no character class can earn back a character against it. Without # that component, credits could let a shorter password satisfy this minimum. # # Exactly one minimum may be live: pwquality.conf.d is read in ASCII sort order and # a second minlen would silently win. The apply script removes the other two. # # Install to /etc/security/pwquality.conf.d/50-ism-minlen-nc-os-p.conf minlen = 15