IdeaWell

Project ideas from Hacker News discussions.

`123456' password used in Danish CPR data breach

Original Article

Hacker News Discussion

📝 Discussion Summary (Click to expand)

Prevalent themes in the discussion

  • Weak authentication practices – Many commenters pointed out the use of trivial passwords and missing multi‑factor authentication as the immediate cause of the leak.

    “If your job title implies even a smidgen of security responsibility, you deserve to be fired for ‘123456’ as your password.” – giveaccountpls

  • Systemic misuse of the CPR number as a secret – The core problem is treating a public‑facing identifier as a confidential credential.

    “Having a unique number that is needed for identifying individuals, but also often used for authentication and thus meant to be kept secret, is bound to go wrong.” – ptnpzwqd

  • Privatization and cost‑driven outsourcing – The breach occurred at a tiny firm hired under a “cheapest offer” rule, highlighting how procurement policies undermine security.

    “It was run by DXC Technology, the Danish branch of a US software house. When doing a contract on such programs the Danish government must take the cheapest offer by rule.” – LarsKrimi

  • Diffuse accountability and blame‑shifting – Participants noted a tendency to scapegoat individuals rather than fix organizational or systemic failures.

    “Everyone is responsible… from the press… to the people who OKed the company for 3rd party access, to the team responsible for regulation…” – ionwake

🚀 Project Ideas

CPRAccessGuard – Real‑time Anomaly Detection for National ID Lookup APIs

Summary

  • Detects abnormal spikes in CPR lookup volume per API key and can auto‑throttle or suspend access.
  • Provides real‑time dashboards, alerts, and immutable audit logs to stop mass‑exfiltration before financial damage occurs.

Details

Key Value
Target Audience Danish government agencies, healthcare providers, and any organization with licensed access to the CPR registry
Core Feature Streaming analytics that flags > X lookups/minute per credential, triggers Slack/email alerts, and optionally enforces rate‑limits or account lockout
Tech Stack Apache Kafka (ingest), Flink/Spark Streaming (analytics), Prometheus + Alertmanager, Grafana, AWS Lambda/Azure Functions for auto‑response
Difficulty Medium
Monetization Revenue-ready: Subscription tiered by monthly lookup volume (e.g., $0.001 per 1k lookups) + flat fee for alerting

Notes

  • Commenters lamented the lack of monitoring: “Why was there no monitoring on a company suddenly looking up 600 people a minute…” (jamescontrol) and “The account with the weak password was a former employee… it’s not on her/him that the account remained active” (zweifuss).
  • Would give administrators the early‑warning capability that prevented the leak from being discovered only via an inflated invoice.

SmallBizVault – Enforced Password Manager & MFA for Micro‑IT Teams

Summary

  • Centralized password vault that enforces strong passwords, mandatory MFA, and automatic rotation for all service accounts.
  • Includes off‑boarding workflow to immediately revoke departing employee credentials, eliminating weak passwords like “123456”.

Details

Key Value
Target Audience Small IT firms, startups, and any organization with ≤ 10 privileged admins (e.g., Pays ApS)
Core Feature Policy‑driven vault (password generation, MFA enforcement via YubiKey/WebAuthn, scheduled rotation) + automated de‑provisioning on employee exit
Tech Stack HashiCorp Vault (backend), React + TypeScript (admin UI), Go microservices for automation, LDAP/AD sync, WebAuthn for MFA
Difficulty Medium
Monetization Revenue-ready: $5 per active user per month (tiered discounts for > 5 users)

Notes

  • HN thread highlighted the root cause: “The account with the weak password was a former employee… the admin password wasn't changed” (zweifuss) and “If only they had insisted on a secure 8 character password!” (mattlondon).
  • SmallBizVault directly addresses the credential‑management gap that allowed the breach to persist.

PublicIDAuth – Token‑Based Authentication Using Public CPR Numbers

Summary

  • Treats the CPR number as a public identifier; authentication relies on a user‑signed cryptographic challenge (private key) so the CPR itself need not be secret.
  • Provides an API that validates CPR + signature, removing the temptation to use CPR as a password‑like secret.

Details

Key Value
Target Audience Danish businesses, fintechs, and developers building services that currently rely on CPR for authentication
Core Feature Issue a short‑lived nonce to the user; user signs it with their private key (stored on a smartcard/YubiKey or mobile app); service verifies signature against the public key bound to the CPR in a registry
Tech Stack Ed25519 signatures, JWT for token exchange, API Gateway (Kong/Envoy), PostgreSQL for CPR‑public‑key mapping, optional integration with MitID
Difficulty High
Monetization Revenue-ready: Pay‑per‑verification (e.g., $0.0005 per auth) + optional enterprise support contract

Notes

  • Several commenters argued the CPR should be public: “RR808: At this stage all SSN, NI numbers, CPR etc should just be made public.” and “Tuwtuwtuwtuw: In Sweden, this data is public by design…”.
  • PublicIDAuth would satisfy the desire to keep the identifier usable for lookup while eliminating its use as a secret authenticator.

OffboardSafe – Automated Employee Off‑boarding & Credential Revocation

Summary

  • Integrates with directory services (AD/LDAP) and SaaS platforms to instantly disable accounts, rotate secrets, and log actions when an employee leaves.
  • Includes an approval workflow and immutable audit trail to prevent dormant accounts from being abused.

Details

Key Value
Target Audience HR departments and IT admins of mid‑size companies that manage multiple internal and cloud services
Core Feature Orchestrates off‑boarding: disables AD/LDAP account, revokes OAuth tokens, rotates API keys, removes access from SSO/idP, and generates a compliance report
Tech Stack Python orchestrator, Temporal.io workflow engine, Azure AD / Google Workspace / Okta APIs, Slack/Teams notifications, PostgreSQL for audit logs
Difficulty Medium
Monetization Revenue-ready: $200 per organization per month (covers up to 200 employees) + $1 per additional employee

Notes

  • The breach was made possible because “the account with the weak password was a former employee… the admin password wasn't changed” (zweifuss) and “Why was the former employee's account still enabled?” (IceDane).
  • OffboardSafe would automatically close that gap, ensuring former employee credentials cannot be leveraged for unauthorized CPR access.

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