Defense in Depth

digraph dd {
  graph [bgcolor=transparent];
  node [shape=ellipse, style=filled, fontname=Inter, fontsize=10];

  Data [label="Data\n(encryption, DLP, RBAC)", fillcolor="#fee2e2"];
  App  [label="Application\n(WAF, SAST, RASP)", fillcolor="#fef3c7"];
  Host [label="Host\n(EDR, patching, hardening)", fillcolor="#dbeafe"];
  Net  [label="Network\n(segmentation, IDS, firewalls)", fillcolor="#ede9fe"];
  Per  [label="Perimeter\n(VPN, MFA, IAM)", fillcolor="#dcfce7"];
  Phy  [label="Physical\n(badges, CCTV, locks)", fillcolor="#fce7f3"];
  Pol  [label="Policies & training", fillcolor="#fde68a"];

  Pol -> Phy -> Per -> Net -> Host -> App -> Data;
}