Application Protocol Data Unit

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Abbreviations / Acronyms / Synonyms:

APDU

NIST SP 1800-12b, NIST SP 800-101 Rev. 1, NIST SP 800-157, NIST SP 800-73-4, NIST SP 800-96, NISTIR 8347

Definitions:

A part of the application layer in the Open Systems Interconnection Reference model that is used for communication between two separate device's applications. In the context of smart cards, an APDU is the communication unit between a smart card reader and a smart card. The structure of the APDU is defined by [ISO 7816-4].
Sources:
NIST SP 800-157

Glossary Comments

Comments about specific definitions should be sent to the authors of the linked Source publication. For NIST publications, an email is usually found within the document.

Comments about the glossary's presentation and functionality should be sent to secglossary@nist.gov.

See NISTIR 7298 Rev. 3 for additional details.