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'''Extended Access Control''' ('''EAC''') is a set of advanced security features for [[Biometric passport|electronic passports]] that protects and restricts access to sensitive personal data contained in the [[Radio-frequency identification|RFID]] chip. In contrast to common personal data (like the bearer's photograph, names, date of birth, etc.) which can be protected by basic mechanisms, more sensitive data (like [[fingerprint]]s or [[iris images]]) must be protected further for preventing unauthorized access and skimming. A chip protected by EAC will allow that this sensitive data is read (through an encrypted channel) only by an authorized passport inspection system.<ref>
{{cite web
| title = Security and privacy issues in machine readable travel documents (MRTDs)
| url = http://domino.watson.ibm.com/library/CyberDig.nsf/papers/751B6341BFB9015485256FDB005DB216/$File/RC23575.pdf
| work = RC 23575 (W0504-003)
|author1=G. S. Kc |author2=P. A. Karger | publisher = IBM
| accessdate = 4 Jan 2012
| date = 1 April 2005
}}</ref><ref>
{{cite book
| title = Public key infrastructure: 4th European PKI Workshop : theory and practice, EuroPKI 2007
|author1=Javier López |author2=Pierangela Samarati |author3=Josep L. Ferrer | publisher = Springer
| year = 2007
| isbn = 978-3-540-73407-9
| page = 41
| url = https://books.google.com/books?id=cNanimitjLwC&pg=PA41
}}</ref>

EAC was introduced by [[International Civil Aviation Organization|ICAO]]<ref>{{cite book
| title = ICAO Doc 9303, Machine Readable Travel Documents, Part 1: Machine Readable Passports, Volume 2: Specifications for Electronically Enabled Passports with Biometric Identification Capability
| publisher = International Civil Aviation Organization ([[ICAO]])
| year = 2006
| edition = Sixth
| page = 84
| section = 5.8 Security for additional biometrics
| url = http://www.icao.int/Security/mrtd/Pages/Document9303.aspx
}}</ref><ref>{{cite journal|title=Temporat Secure Digital Identity|journal=EPassport Extended Access Control|volume=White Paper|url=http://www.securitydocumentworld.com/client_files/eac_white_paper_210706.pdf|accessdate=19 June 2013|archive-url=https://web.archive.org/web/20061021005853/http://www.securitydocumentworld.com/client_files/eac_white_paper_210706.pdf|archive-date=21 October 2006|url-status=dead}}</ref> as an optional security feature (additional to [[Basic Access Control]]) for restricting access to sensitive [[Biometrics|biometric]] data in an electronic [[Machine-readable passport|MRTD]]. A general idea is given: the chip must contain chip-individual keys, must have processing capabilities and additional key management will be required. However, ICAO leaves the actual solution open to the implementing States.

There are several different proposed implementations of the mechanism, all of which must retain [[Backward compatibility|backward-compatibility]] with the [[Legacy system|legacy]] [[Basic Access Control]] (BAC), which is mandatory in all [[European Union|EU]] countries. The European Commission described that the technology will be used to protect fingerprints in member states' e-passports. The deadline for member states to start issuing fingerprint-enabled e-passports was set to be 28 June 2009. The specification selected for EU e-passports was prepared by the German [[Federal Office for Information Security]] (BSI) in their technical report TR-03110.<ref name="tr-03110">
{{cite web
| website = BSI
| title = Advanced Security Mechanisms for Machine Readable Travel Documents – Extended Access Control (EAC)
| url=https://www.bsi.bund.de/cae/servlet/contentblob/532066/publicationFile/44792/TR-03110_v202_pdf
|format=PDF| accessdate = 2009-11-26 }}
</ref> Several other countries implement their own EAC.

==EAC as defined by the EU==

EAC as defined by the [[European Union|EU]] has two requirements: chip and terminal authentication.<ref>{{cite web|first=Dennis |last=Kugler|title=Extended Access Control; Infrastructure and control|date=1 June 2006|volume=|url=http://www.interoptest-berlin.de/pdf/Kuegler_-_Extended_Access_Control.pdf|accessdate=19 June 2013}}</ref>

===Chip authentication (for strong session encryption)===

The chip authentication specification defines a handheld device (CAP reader) with a smart card slot, a decimal keypad, and a display capable of displaying at least 12 characters. ''[[Chip Authentication Program|Chip authentication]]'' (CA) has two functions:
* To authenticate the chip and prove that the chip is genuine. Only a genuine chip can implement communication securely.
* To establish a strongly secured communication channel, using a chip-specific key pair with strong encryption and integrity protection.
Chip authentication has an add-on [[Basic access control|Basic Access Control]] (BAC) with protection against skimming and eavesdropping.

===Terminal authentication (access restricted to authorized terminals)===

''Terminal authentication'' (TA) is used to determine whether the ''inspection system'' (IS) is allowed to read sensitive data from the e-passport. The mechanism is based on [[digital certificates]] which come in the format of ''card verifiable'' certificates.
* Each inspection system is granted a ''[[Card Verifiable Certificate|card verifiable certificate]]'' (CVC) from a ''document verifier'' (DV). The inspection system's certificate is valid only for a short time period, typically between 1 day and 1 month.
* An inspection system may have several CVCs installed at any time, one for each country that allows it to read sensitive data.
* The CVC allows the inspection system to request one or more items of sensitive data, such as data for [[iris recognition|iris]] or [[fingerprint recognition]].<ref name="eac-protocol">{{cite web
| first = Dennis
| last = Kügler
| title = Extended Access Control: Infrastructure and Protocol
| url = http://parallels.googlecode.com/svn/trunk/msifakis/WIRELESS/Kuegler_-_Extended_Access_Control.pdf
| accessdate = 2016-05-03
}}{{Dead link|date=August 2019 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>

A document verifier certificate is granted from the ''country verification certificate authority'' (CVCA). These certificates can be for domestic or foreign document verifiers. The certificates are typically issued for medium amounts of time, between half a month and 3 months. The CVCA is generated by each country and is typically valid for 6 months to 3 years.<ref name="eac-protocol" />

==External links==
{{reflist}}

==External links==
* [http://www.openscdp.org/scripts/icao/eacpki.html OpenSCDP.org] – Open Source EAC-PKI for development and testing
* [http://www.ejbca.org/ EJBCA.org] – Open Source PKI (BAC and EAC)
* [https://www.bsi.bund.de/EN/Service-Navi/Publications/TechnicalGuidelines/TR03110/BSITR03110.html EAC specifications from BSI] {{Webarchive|url=https://web.archive.org/web/20211227120500/https://www.bsi.bund.de/EN/Service-Navi/Publications/TechnicalGuidelines/TR03110/BSITR03110.html |date=2021-12-27 }}

{{DEFAULTSORT:Extended Access Control}}
[[Category:International travel documents]]
[[Category:Passports]]
[[Category:Biometrics]]
[[Category:Data security]]
[[Category:Information sensitivity]]

Extended Access Control - Revision history

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