digital certificate
Last modified: Friday, January 09, 2004
An attachment to an electronic message used for security purposes. The most common use of a digital certificate is to verify that a user sending a message is who he or she claims to be, and to provide the receiver with the means to encode a reply.
An individual wishing to send an encrypted message applies for a digital certificate from a Certificate Authority (CA). The CA issues an encrypted digital certificate containing the applicant's public key and a variety of other identification information. The CA makes its own public key readily available through print publicity or perhaps on the Internet.
The recipient of an encrypted message uses the CA's public key to decode the digital certificate attached to the message, verifies it as issued by the CA and then obtains the sender's public key and identification information held within the certificate. With this information, the recipient can send an encrypted reply.
The most widely used standard for digital certificates is X.509.
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PKI Key
Click here if you want to import the root certificate into Microsoft Internet Explorer
Root Certificate (PEM Format)
Root Certificate (DER Format)
GPG Key
CAcert's GPG Key
PKI finger/thumb print signed by the CAcert GPG Key
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
For most software, the fingerprint is reported as:
A6:1B:37:5E:39:0D:9C:36:54:EE:BD:20:31:46:1F:6B
Under MSIE the thumbprint is reported as:
135C EC36 F49C B8E9 3B1A B270 CD80 8846 76CE 8F33
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.2 (GNU/Linux)
iD8DBQE/VtRZ0rsNAWXQ/VgRAphfAJ9jh6TKBDexG0NTTUHvdNuf6O9RuQCdE5kD
Mch2LMZhK4h/SBIft5ROzVU=
=R/pJ
-----END PGP SIGNATURE-----
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
pub 1024D/65D0FD58 2003-07-11 CA Cert Signing Authority (Root CA)
Key fingerprint = A31D 4F81 EF4E BD07 B456 FA04 D2BB 0D01 65D0 FD58
sub 2048g/113ED0F2 2003-07-11 [expires: 2033-07-03]
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.5 (GNU/Linux)
iD8DBQFCEDLN0rsNAWXQ/VgRArhhAJ9EY1TJOzsVVuy2lL98CoKL0vnJjQCfbdBk
TG1yj+lkktROGGyn0hJ5SbM=
=tXoj
-----END PGP SIGNATURE-----
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