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Attribute glossary

eHerkenning gets you access to several numbers to identify different types of business entities. This page aims to provide additional information about the characteristics of these numbers.

idpId​

The raw (unhashed) value of the subject ID. We return the first existing (not-null) value of the following attributes with the following order:

  1. Specific pseudonym (see Pseudo attribute)
  2. Encrypted BSN (eIDAS)
  3. Encrypted pseudonym (eIDAS)
  4. Pseudonym (eIDAS)

Note that to receive the raw value of the subject (idpId), you must request it in your authentication request using the idpId (idp-id for OIDC) parameter. To learn more, see the attributes reference documentation.

KvK number​

The Chamber of Commerce (KvK) number of the organisation. Every new company in the Netherlands must register in the Business Register (Handelsregister) of the Netherlands Chamber of Commerce KVK.

When a company registers, they receive a KvK number that serves as a proof that they are a registered business. You can search for companies in the Business Register at https://www.kvk.nl/zoeken/.

The KvK number consists of 8 digits, for example 12345678.

EORI​

The Economic Operators Registration and Identification number (EORI number) is a registration and identification number for businesses that trade goods into and out of the European Union (EU). The number applies to organisations that are based in the EU and undertake customs activities in the EU.

LEI​

The Legal Entity Identifier (LEI) is a unique number that the Dutch Financial Authority AFM uses to trace global transactions.

Companies that are legal entities (for instance private or public limited companies) are required to have a LEI if:

  • They trade shares (including their own) or derivatives on the stock exchange.
  • They are a foreign legal entity, but registered in the Dutch Business Register (Handelsregister) and trading on the stock exchange.

PROBAS​

The PROBAS number is issued by the Tax Authorities to organisations/persons that are not registered in the Business Register (Handelsregister), such as embassies and consulates. The PROBAS number is registered in the PROBAS register which is managed by the Ministry of Foreign Affairs.

Pseudo​

The Specific pseudonym is a unique identifier for each different combination of user, represented service consumer, intermediary and service provider.

The format is a 32 bytes integer in hexadecimal format (which contains information about the user) followed by the @ sign and a 16 bytes integer in hexadecimal format (represented with 32 digits) such that 64digitsHex@32digitsHex.

For example:

ABCDEF1234567890ABCDEF1234567890ABCDEF1234567890ABCDEF1234567890@ABCDEF1234567890ABCDEF1234567890

Pseudo ID​

The PseudoID is a service provider-specific persistent pseudonym that is encrypted specifically per service provider (your organisation) for privacy reasons. The PseudoID is identical for the end-user, regardless of the eHerkenning provider used for authentication. It is hashed and Base64 encoded.

RSIN​

The Legal Entities and Partnerships Identification Number (RSIN stands for Rechtspersonen en Samenwerkingsverbanden Informatienummer in Dutch) is a unique identification number for legal entities and partnerships. Sole proprietorship (self-employed) organisations do not have an RSIN. It is intended for (government) organisations to easily exchange information with each other.

The number consists of 9 digits.

SEED​

The Single European Electronic Data (SEED) number is a unique identifier assigned to authorised operators and warehouses within the EU to facilitate the movement of excisable goods, such as alcohol, tobacco, and energy products, between member states. It is stored in the Single European Electronic Data (SEED) system, which allows authorities to verify the status of traders and prevent fraud.

Service ID​

When you register a new service in the service catalogue, the service is assigned:

  • Service ID
  • Service UUID

The Service ID is string to uniquely identify a service in the context of your organisation. It is an URN with the following format:

urn:etoegang:DV:<ORGANISATION_IDENTIFICATION_NUMBER>:services:<SERVICE_INDEX>

where:

  • ORGANISATION_IDENTIFICATION_NUMBER is your Organization Identifying Number (OIN).
  • SERVICE_INDEX is the number you provided when creating the service in the Signicat Dashboard.

For example:

urn:etoegang:DV:0000000X123456780000:services:1010

Service UUID​

The ServiceUUID is an identifier of a service that is unique in the context of the eHerkenning network.

SIC​

The Standard Industrial Classification (SIC) is a four-digit code to classify the type of business of an organisation. It is used for statistical purposes across agencies.

Subject ID​

The Subject ID identifies the end-user that performed the authentication transaction. After an authentication transaction, you always receive the subject in hashed form in the response.

In the case of eHerkenning, Signicat returns the hashed value of the idpId (raw subject) as subject in the response.

Read more about the subject.

Vestigingsnummer​

Branch number (Vestigingsnummer in Dutch). Any legal entity that has a branch must officially register this branch. Each branch of a business or legal entity in the Business Register (Handelsregister) has a unique 12-digit branch number. For example, 321654871234.

Additional resources​

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