jcoffey-dev is traveling from Thursday 1 October through Sunday 4 October. Issues and pull requests are welcome, and will get an answer after that. Thanks for your patience.
Phase 2b of the DLP and mail flow rules spec: every identifier in the
§2.3 catalog, each implemented from its issuer's published rules and
tested against published examples.
US (SSN, ITIN, EIN, ABA routing, driver's licenses, MBI, NPI, DEA), UK
(NI number, NHS number, UTR), Canada (SIN), Australia (TFN, Medicare),
the EU (Germany's tax ID and ID card, France's NIR, Spain's DNI/NIE,
Italy's codice fiscale, the Dutch BSN, Belgium's national number,
Poland's PESEL, Sweden's personnummer, Denmark's CPR, Finland's HETU,
Ireland's PPS, Portugal's NIF, Austria's SVNR), Norway, Switzerland,
India (Aadhaar, PAN), China, Japan, Singapore, South Korea, Brazil (CPF,
CNPJ), Mexico (CURP) and South Africa. 49 detectors in all, plus seven
templates named for what they find.
An identifier that is only digits and whose check about one random
number in ten passes counts alone only in its written form
(536-22-1234, 943 476 5919) and as bare digits only beside a word; ABA
routing numbers and NPIs always need one. Spec §2.3 records this.
A test runs every detector over an ordinary business email (order,
invoice and tracking numbers, dates, amounts, an address) and requires
nothing to fire but the contact detectors. 47 unit tests.
All six settled as recommended. Answer 6 ("and any other recognized and protected PII") becomes a catalog of identifiers with published formats and checks, grouped by region, each either checked by its check digit or counted only beside a corroborating word, plus templates named for what they find. Data with no number to find is covered by word lists and not claimed as detection. Office documents are read; PDF counts as can't be inspected.
Phase 1: one native rule engine at DATA, after the system Sieve script,
for both DLP policies and transport rules. DLP checks outgoing mail
with counted detectors (payment cards, IBAN, US SSN, word lists,
patterns) and blocks, warns with an audited override, or holds for
review. Held mail stays in the queue unscheduled, with its own review
record, so the queue's stored format is unchanged. Matches go to the
audit log without the matched text. Six questions for John at the end.
jcoffey-dev