#security
Protect your financial data with security best practices and tools
PCI DSS 4.0's transition period ended March 31, 2025, so every merchant assessment from 2026 onward now enforces mandatory payment-page script monitoring, MFA for all cardholder-data access, and authenticated internal vulnerability scans — noncompliance risks $5,000-$100,000 monthly fines from acquiring banks plus an average $173,692 added breach cost per IBM's research.
The FBI logged over 22,000 reports of AI voice or video fraud with nearly $893 million in losses in a single recent year; callback verification on a separate channel, a rotating code word, and a dollar-threshold second approver are the three no-cost controls that stop deepfake wire-transfer fraud.
Every US state has its own data breach notification law, with individual-notice deadlines ranging from 30 days (California, Colorado, Florida, New York, Washington) to 60 days (Connecticut, Texas), and small businesses must comply with the law of every state where an affected person lives, not just their home state.
Business email compromise cost U.S. victims over $3 billion in reported losses in 2025, and 86% of it moves by wire or ACH. Six accounts payable controls — callback verification, dual approval, vendor master file locks — stop fraudulent transfers before the money leaves.
Connect your Beancount.io ledger to Claude, Cursor, and compatible AI clients. Query spending, reconcile accounts, and preview ledger edits.
A 72-hour response playbook for small business owners facing EIN-based tax fraud, registered agent hijacking, or payroll account takeover — including how to file IRS Form 14039-B, place fraud alerts at Dun & Bradstreet, Experian Business, and Equifax Small Business, and harden IRS, Secretary of State, banking, and payroll footprints year-round.
California's SB 53 (Transparency in Frontier AI Act) took operative effect on January 1, 2026, requiring foundation model developers training above 10^26 FLOPs to publish safety frameworks, report critical incidents to Cal OES within 15 days (24 hours for imminent threats), maintain anonymous whistleblower channels, and face civil penalties up to $1 million per violation enforced by the California Attorney General.
A 2026 operating guide to SEC Item 1.05 Form 8-K cybersecurity disclosure — when the four-business-day clock starts, how to make the materiality call without unreasonable delay, when the Attorney General can grant a delay, the Item 1.05 vs. Item 8.01 trap, and what Regulation S-K Item 106 requires in your annual 10-K.
A founder's guide to SOC 2 Type II in 2026 — what it actually tests, realistic cost ($20K–$35K first year) and timeline (3–12 month observation window), which Trust Services Criteria to scope, the seven controls that trip startups up, and how to keep enterprise deals moving with Type I bridge letters while the audit runs.
PCI DSS v4.0.1 governs every 2026 assessment, and FAQ 1588 has narrowed who qualifies for SAQ A. This guide walks small merchants through the new script-tampering rules (6.4.3 and 11.6.1), the 12-character password and MFA requirements, what non-compliance actually costs, and a 12-step checklist for getting it right.
A 2026 guide for solo tax preparers and small bookkeeping firms to build a Written Information Security Plan that satisfies the FTC Safeguards Rule's nine elements, the IRS PTIN attestation, and the 30-day breach notification requirement — using IRS Publication 5708 as the scaffold and a 90-day rollout.
A practical guide to building a Written Information Security Plan that satisfies the FTC Safeguards Rule and IRS Publication 5708 — covering the nine required elements, technical controls like MFA and encryption, penalty exposure up to $46,517 per violation per day, and a six-week roadmap for tax preparers, CPAs, and bookkeepers.
