CITS3002 Computer Networks  
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Digital certificate encoding

Today, certificates are defined by the ISO X.509 protocol and appears as an application/x-x509-user-cert MIME type.

The data is encoded using Abstract Syntax Notation (ASN.1), encoding and transmitted in ASCII using base64 encoding.

(18bit data -> 24bit representation).

Early debate centred on whether the certificate itself needed to be encrypted (now not).

CITS3002 Computer Networks, Lecture 12, Cryptography's role in networking, p21, 22nd May 2024.