ISO IEC 19785-2 pdf – Information technology — Common Biometric Exchange Formats Framework — Part 2: Biometric registration authority
1 Scope
This document describes the identification scheme used by the Biometric Registration Authority(BRA) in preparing, maintaining and publishing registers of identifiers for biometric organizationsand biometric objects,and provides a description of BRA responsibilities and services. Proceduralrequirements and recommendations are not within the scope of this document and are maintainedseparately on the ISO/IEC JTC 1/sC 37 website1 .
2Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references,only the edition cited applies. Forundated references, the latest edition of the referenced document(including any amendments) applies.ISO/IEC 2382-37,Information technology – Vocabulary— Part 37: Biometrics
ISO/IEC 19785-1, Information technology -Common Biometric Exchange Formats Framework —Part 1:Data element specification
3Terms and definitions
For the purposes of this document,the terms and definitions given in ISO/IEC 2382-37 andISO/IEC 19785-1 and the following apply.
lSO and IEC maintain terminology databases for use in standardization at the following addresses:- ISO online browsing platform: available at https://www.iso .org/obp
—IEC Electropedia: available at https://www.electropedia .org/
3.1
applicant
organization requesting registration as a CBEFF biometric organization, or a registered CBEFFbiometric organization requesting registration of a biometric object
3.2
open standard
standard that is subject to vetting procedures that ensure that it is technically correct and accurate andhas wide-spread approval
3.3
register
record of assigned identifiers for CBEFF biometric organizations and biometric objects
4Abbreviated terms
.o一the Purposes of this cocumnt. theanuorn.n..m.nryent…apply.
ASN.1
Abstract Syntax Notation One
BDBbiometric data block
BIR
biometric information record
BRA
biometric registration authority
CBEFF
common biometric exchange formats framework
PAD
presentation attack detection
SB
security block
5 General
5.1 Identifiers for biometric organizations and biometric objects5.1.1 Biometric organization identifiers
Biometric organization identifiers shall be expressible as 16-bit positive integers (see 5.2.4).The valuezero (0000 hex) and the values in sequence beginning from 61440 (F000 hex) to 65535 (FFFF hex) arereserved and are not valid biometric organization identifiers.
5.1.2 Biometric object identifiers
For a given biometric organization, biometric objects of the same type shall have unique identifiers.As with biometric organization identifiers, biometric object identifiers shall be expressible as 16-bitpositive integers.
5.2 ASN.1 object identifier components
5.2.1 ASN.1 object identifier components are assigned to:
a) organizations: any organization concerned with the specification of biometric formats or with
biometric products that either directly, or through the data that they produce, claim conformanceto or can be used in conjunction with any international standard that uses registered biometricorganization identifiers;
b) biometric objects: objects of various biometric categories and subcategories(see
subelauses 5.2.7-through 5.2.11), including BlR formats,BDB formats,SB formats, and biometricproducts. Subcategories of specialized biometric products are defined for: capture device, featureextraction algorithm, comparison algorithm, quality algorithm, compression algorithm and PADmechanism.
5.2.2 ASN.1 object identifiers are a form of worldwide unambiguous identification based on ahierarchical tree structure and independent hierarchical registration authorities. The ASN.1 objectidentifier tree has a root arc, arcs beneath that root arc, arcs beneath each of those arcs, and so on, to anydepth. Arcs are identified by non-negative integer values (zero or greater) that provide unambiguousidentification of an arc within the superior arc.Arcs can also be given names, but these are auxiliary tothe numerical values and are not required. Names shall consist of an arbitrary number (one or more) ofletters, digits, and hyphens.The first character shall be a lowercase letter. The last character shall not be a hyphen. A hyphen shall not be immediately followed by another hyphen.An object is identified bythe sequence of arc values (numerical, or for early arcs, arc names) from the root to the object.
NOTE For a comprehensive description of the ASN.1 object identifier tree, see ISO/IEC 8824-1.
5.2.3 lt is possible in representations of an object identifier to imply (by the context of thatrepresentation) identification of part of the path from the root to a node in the object identifier tree.Ilnthe extreme case, only a single object identifier component from that implied node need be represented.When context of the object identifier arc is not obvious, the full object identifier value should be given.EXAMPLE ISO/IEC19785-1 and the ISO/IEC19784 series use a 16-bit field to provide the identification of anobject identifier arc beneath an arc that is implied by the context.
5.2.4 Components of ASN.1 object identifiers are non-negative integer values (zero or greater)of unlimited magnitude.However, object identifier values used for registration purposes shall berestricted to positive integers, with a minimum value of 1 and a maximum value of 65535.This approachallows the use of zero to encode the abstract value NO VALUEAVAILABLE in CBEFF patron formats andsupports standards which restrict the ASN.1 object identifiers components to 16-bit positive integers.
5.2.5 Successful registration as a biometric organization provides that biometric organization witha CBEFF biometric organization identifier. This is a 16-bit binary value (that can be interpreted as apositive integer) for an ASN.1 object identifier arc under
{iso(1) registration-authority(1) cbeff(19785) biometric-organization (0)
The allocated object identifier value is unambiguous worldwide, but the CBEFF biometric organizationidentifier can also be used alone in contexts where the preceding arcs are implied.
5.2.6 A biometric organization that is a recognized standards development organization (standardsbody,working group, or industry consortium) and is a producer of open standards as defined inISO/IEC 19785-1 is a CBEFF patron.Any biometric organization may register BDB formats (see 5.2.8),SB formats (see 5.2.9), and biometric products (see 5.2.10-and 5.2.11), but only a CBEFF patron canregister a BIR format, or a CBEFF patron format (see 5.2.7).