Internationalization Updates to RFC 5280

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Last updated 2017-05-04
Replaced by draft-ietf-lamps-rfc5280-i18n-update
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


These updates to RFC 5280 provide clarity on the handling of Internationalized Domain Names (IDNs) and Internationalized Email Addresses in X.509 Certificates.


Russ Housley (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)