community.cs.hku.hk

- community.cs.hku.hk -

Issued by

About this certificate

This digital certificate with serial number 0d:e7:ec was issued on by Equifax.

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 below. I hope this certificate review is providing you the detailed information in a simple form you where looking for.


We have idenified some issues with this certificate:
  • KeyUsage [ContentCommitment DataEncipherment DigitalSignature KeyEncipherment] (00001111) inconsistent with multiple purpose ExtKeyUsage [clientAuth serverAuth] The certificate MUST only be used for a purpose consistent with both key usage extension and extended key usage extension. (RFC 5280, Section 4.2.1.12.)

community.cs.hku.hk

Company registration number: j8pysXrHAL26/9GAUMq4fvbKS2eWdm1T
Organization: community.cs.hku.hk
Organization unit: GT97736658
Organization unit: See www.geotrust.com/resources/cps (c)09
Organization unit: Domain Control Validated - QuickSSL Premium(R)
Country: HK

Equifax

Organization: Equifax
Organization unit: Equifax Secure Certificate Authority
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 0d:e7:ec
Serial Number (int): 911340
Serial Number lenght: 20 bits, 3 octets

SubjectKeyId: 4c:09:05:7b:36:c9:bb:3a:9d:37:af:f3:11:44:df:d7:56:34:d7:dc
AuthorityKeyId: 48:e6:68:f9:2b:d2:b2:95:d7:47:d8:23:20:10:4f:33:98:90:9f:d4

Fingerprint (sha1): 1a:9f:a4:f3:1b:23:72:e7:93:4f:8d:09:f9:44:bd:86:9a:04:b5:79
Fingerprint (sha256): 00:cf:4b:2a:26:83:1a:85:56:26:2d:ee:e8:ac:ad:af:fd:42:d0:c6:73:a3:b2:a6:1f:6b:d4:63:5c:94:4f:e6


Revocation information

CRL Distribution Point: http://crl.geotrust.com/crls/secureca.crl

Check the revocation status for certificate community.cs.hku.hk

0

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for community.cs.hku.hk

Public Key Algorithm

RSA

Key Size

1024

Signature Algorithm

SHA1 with RSA

Key Usage

Digital Signature
Content Commitment
Key Encipherment
Data Encipherment

Extended Key Usages

Server Authentication
Client Authentication

Extensions

5 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

This certificate doesn't contain any subject alternative names.

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Certificate

The complete raw certificate details for community.cs.hku.hk in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDQsVL1tgLBXzW6hoxY2ZlfVS2K
eikcsgp1+MHYeeh4TwMfm49TJlxtdFf7kkaCpJTi7lDXjvb80ZllRRS9LmaLOUnQ
uWhSF5fJ7E5XSuvWnFIh9XbQ3FitabmnZTYN/RMLT8hkcevyIgDkpzt0FCPMHybN
mftio2xKlo1BjYSqAQIDAQAB
-----END PUBLIC KEY-----

ASN.1 decoded

 [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . [c:0|t:2|false] INTEGER 2
 . . . . . . . . [c:0|t:2|false] INTEGER 911340
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.5 (sha1WithRSAEncryption)
 . . . . . . . . . . . . [c:0|t:5|false] NULL 
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.6 (countryName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'US'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.10 (organizationName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Equifax'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.11 (organizationalUnitName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Equifax Secure Certificate Authority'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2009-11-15 09:22:46 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2012-01-16 10:23:48 +0000 UTC
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.5 (serialNumber)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'j8pysXrHAL26/9GAUMq4fvbKS2eWdm1T'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.6 (countryName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'HK'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.10 (organizationName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'community.cs.hku.hk'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.11 (organizationalUnitName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'GT97736658'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.11 (organizationalUnitName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'See www.geotrust.com/resources/cps (c)09'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.11 (organizationalUnitName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Domain Control Validated - QuickSSL Premium(R)'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3 (commonName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'community.cs.hku.hk'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.1 (rsaEncryption)
 . . . . . . . . . . . . . . . . [c:0|t:5|false] NULL 
 . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (1120 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 146548978109140140009713607546548817449758312981544832166363486442913951580083145795180873924825343788510742356289796270939927729890931615187173789459348833159100286331681081901901147521233472367425826489708770932597175379296932028083239986336113887000679278498106527834622474610613885165264371904923983718913
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 65537

 . . . . . . . . [c:2|t:3|true] ORAddress 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.15 (keyUsage)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (4 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (4 bits)
							04f0
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.14 (subjectKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							4c09057b36c9bb3a9d37aff31144dfd75634d7dc
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.31 (cRLDistributionPoints)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (51 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://crl.geotrust.com/crls/secureca.crl'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35 (authorityKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 48e668f92bd2b295d747d82320104f3398909fd4
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.37 (extKeyUsage)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.1 (serverAuth)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2 (clientAuth)
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.5 (sha1WithRSAEncryption)
 . . . . . . . . [c:0|t:5|false] NULL 
 . . . . [c:0|t:3|false] BIT STRING (1024 bits)
		002ad61027499e6a380cdd3d06f33a36e2c3124cefbdca5b12ebdbea83c61c7a90b208d34b3f40c651341c23da8c04671ea20f07bcf415a6a1c41b8ea38fbff41dd77a004b26c5d5f2cb64404c9893c0b1c099d5d581c49ee416013ff0ed7d86fdf4225d7fc04d7dbe6d90786fbf87b9a3a2ac989c86bbf95b957e7454a59a2cda