This digital certificate with serial number
53:8b:ab:f4:05:c9:f9:75 was issued on
by National Institute of Informatics.
This certificate has already expired and will cause a warning
or error message in the browser it's still listed on this site to allow you to look back on previously issued certificates.
If we have found any compliance issues with this certificate they will be shown
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We have idenified some issues with this certificate:
Subscriber Certificate: authorityInformationAccess MUST contain the HTTP URL of the Issuing CA's OSCP responder.
Subscriber Certiifcate: authorityInformationAccess MUST be present, with the exception of stapling.
Subscriber Certificate: commonName is deprecated.
Subscriber certificates authorityInformationAccess extension should contain the HTTP URL of the issuing CA’s certificate
Organization:Hokkaido University Organization unit: eng
National Institute of Informatics
Organization:National Institute of Informatics Organization unit: UPKI
Organization unit: NII Open Domain CA - G2
Time since certificate expired
This certificate has expire since
Serial Number (hex): 53:8b:ab:f4:05:c9:f9:75
Serial Number (int): 6020094391468292469
Serial Number lenght: 63 bits, 8