community.cs.hku.hk

Issued by GeoTrust DV SSL CA

About this certificate


This digital certificate with serial number 03:4a:cc was issued on by GeoTrust Inc. .

While the 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.

Cerificate errors/warnings *beta

  • ERROR: localityName is required for [EV] certificates
  • ERROR: businessCategory is required for [EV] certificates
  • ERROR: jurisdictionCountryName is required for [EV] certificates
  • ERROR: localityName or stateOrProvinceName is required if organizationName is set
  • ERROR: stateOrProvinceName is required if organizationName is set

community.cs.hku.hk

Company registration number: -Q/4mm0GMM-lC3-vmuiUY06NLg3UZWKF
Organization: community.cs.hku.hk
Organization unit: GT97736658
Organization unit: See www.geotrust.com/resources/cps (c)11
Organization unit: Domain Control Validated - QuickSSL(R) Premium
Country: HK

GeoTrust Inc.

Organization: GeoTrust Inc.
Organization unit: Domain Validated SSL
Country: HK

Time since certificate expired

This certificate has expire since

Certificate Details

Serial Number (hex): 03:4a:cc
Serial Number (int): 215756
Serial Number lenght: 18 bits, 3 octets

SubjectKeyId: f7:df:36:d1:3b:ba:b4:7e:ed:72:f4:f0:20:92:c2:54:0a:bb:d7:77
AuthorityKeyId: 8c:f4:d9:93:0a:47:bc:00:a0:4a:ce:4b:75:6e:a0:b6:b0:b2:7e:fc

Fingerprint (sha1): 6a:45:84:10:0e:45:d1:52:cd:36:78:60:4c:8d:f7:cb:41:2f:bf:5c
Fingerprint (sha256): 2b:53:a0:2a:e8:9c:d8:57:9b:0e:9d:81:31:90:a5:5c:14:ca:cf:b2:fe:d6:0c:e8:2d:e0:6a:7d:01:fa:07:f8

Issuing Certificate URL: http://gtssldv-aia.geotrust.com/gtssldv.crt

Revocation information

CRL Distribution Point: http://gtssldv-crl.geotrust.com/crls/gtssldv.crl

Check the revocation status for the current certificate on community.cs.hku.hk
1
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details about this certificate


Public Key Algorithm

RSA

Key Size

2048

Signature Algorithm

SHA1 with RSA



Key Usage

Digital Signature
Key Encipherment

Extended Key Usages

Server Authentication
Client Authentication

Extensions

8 extensions
No unhandled critical extensions



CA Certificate

This is not a CA certificate

Subject Alternative Names

This certificate doesn't contain any other subject alternative names besides the common name of the subject: community.cs.hku.hk

Certificate

The complete raw certificate details in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE----- MIIFAzCCA+ugAwIBAgIDA0rMMA0GCSqGSIb3DQEBBQUAMGExCzAJBgNVBAYTAlVT MRYwFAYDVQQKEw1HZW9UcnVzdCBJbmMuMR0wGwYDVQQLExREb21haW4gVmFsaWRh dGVkIFNTTDEbMBkGA1UEAxMSR2VvVHJ1c3QgRFYgU1NMIENBMB4XDTExMTIxOTIx MTYwMVoXDTE0MDIxOTE3NTEwN1owgfUxKTAnBgNVBAUTIC1RLzRtbTBHTU0tbEMz LXZtdWlVWTA2TkxnM1VaV0tGMQswCQYDVQQGEwJISzEcMBoGA1UEChMTY29tbXVu aXR5LmNzLmhrdS5oazETMBEGA1UECxMKR1Q5NzczNjY1ODExMC8GA1UECxMoU2Vl IHd3dy5nZW90cnVzdC5jb20vcmVzb3VyY2VzL2NwcyAoYykxMTE3MDUGA1UECxMu RG9tYWluIENvbnRyb2wgVmFsaWRhdGVkIC0gUXVpY2tTU0woUikgUHJlbWl1bTEc MBoGA1UEAxMTY29tbXVuaXR5LmNzLmhrdS5oazCCASIwDQYJKoZIhvcNAQEBBQAD ggEPADCCAQoCggEBANtaWaqDxt1f1G/hrIdBfyB2/gHsB07Zjjh/d7ZwbZY48qKl TCFzp3zi0ZpFFaDR9yzyM0kdRN7RtxfIWftJHsWB8+LJDtdI++mfzppJriM0UAfb 8Vs9zhA9alpr6FB2ixtwUPesDS41RTTMPbu5Acbl6Dffb+Zl51x/zrg20IgKtzWm 7zO0AaW2oqQlrTy7vfeid0b2i3i1d4akLwTxjMe5v7/Zga0MdnLOoHSJVzETPfMR xUPlwFJ4v1aqEC7MjsD3HJcJJcKU3ajNvBJ6xHTxuss1zAW3Sf+eGoMRVV9YEY4X Es6iOrmlmKte6kkNDTl0hsiWzYvkoB8Y0rCwcgMCAwEAAaOCAS0wggEpMB8GA1Ud IwQYMBaAFIz02ZMKR7wAoErOS3VuoLawsn78MA4GA1UdDwEB/wQEAwIFoDAdBgNV HSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwHgYDVR0RBBcwFYITY29tbXVuaXR5 LmNzLmhrdS5oazBBBgNVHR8EOjA4MDagNKAyhjBodHRwOi8vZ3Rzc2xkdi1jcmwu Z2VvdHJ1c3QuY29tL2NybHMvZ3Rzc2xkdi5jcmwwHQYDVR0OBBYEFPffNtE7urR+ 7XL08CCSwlQKu9d3MAwGA1UdEwEB/wQCMAAwRwYIKwYBBQUHAQEEOzA5MDcGCCsG AQUFBzAChitodHRwOi8vZ3Rzc2xkdi1haWEuZ2VvdHJ1c3QuY29tL2d0c3NsZHYu Y3J0MA0GCSqGSIb3DQEBBQUAA4IBAQBXOYyCwHzPB79c8/tws0cueISQOgoqFYR0 +mkEZ6o/xC+8Jn4JJCwfMjtUrMJaybZ7IRl/70AoF3VCpMnJ/LxmsYhSmmh2TQWC ZEG1cVzGWAXAJDBR3n2zVELy2Bs67+nmQhNs9tEtiEUgQYmXPji9E6INN35xg58p ZG5jUFlbIYMQNrZ9O6xYl0CsmqVkZ28KnRfo+Xcppd1hyZJ+WDT8PKezAEo12+2s 2xj97fK8aR61M4YKcLf6Fx+ZvD9cPHne0TStkqKAKFr8ml+aPYCnbY7mPc8tqYqF ejlN/BDG4mFCLougcRRRu4y8m0NRx+Qd7BzcVNZVudYsiGv9cUcw -----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA21pZqoPG3V/Ub+Gsh0F/ IHb+AewHTtmOOH93tnBtljjyoqVMIXOnfOLRmkUVoNH3LPIzSR1E3tG3F8hZ+0ke xYHz4skO10j76Z/OmkmuIzRQB9vxWz3OED1qWmvoUHaLG3BQ96wNLjVFNMw9u7kB xuXoN99v5mXnXH/OuDbQiAq3NabvM7QBpbaipCWtPLu996J3RvaLeLV3hqQvBPGM x7m/v9mBrQx2cs6gdIlXMRM98xHFQ+XAUni/VqoQLsyOwPcclwklwpTdqM28EnrE dPG6yzXMBbdJ/54agxFVX1gRjhcSzqI6uaWYq17qSQ0NOXSGyJbNi+SgHxjSsLBy AwIDAQAB -----END PUBLIC KEY-----

ASN1 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 215756 . . . . . . . . [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 'GeoTrust Inc.' . . . . . . . . . . . . [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 Validated SSL' . . . . . . . . . . . . [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 'GeoTrust DV SSL CA' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2011-12-19 21:16:01 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2014-02-19 17:51:07 +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 '-Q/4mm0GMM-lC3-vmuiUY06NLg3UZWKF' . . . . . . . . . . . . [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)11' . . . . . . . . . . . . [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(R) Premium' . . . . . . . . . . . . [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 (2160 bits) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 27690742160362227338350152832162079750975965030400859923884469886132061860390154574550881829952635349935094157376327431420560048261762294252747205509141936129233419347820223649396377745048278152789726936008236026190433017363287857337473446718567092214625180896779486857636684847497936661920588704686368073122867819707215171120485311361367645640774793187958553441630824143312961968044702359770345638008887897245418136073757636602685495719092455934599297446843975266910933649366817602114776585811186692671546349445988185294090965102361864485113300401332715288614339059456916512054690122208975790982742063614002354745859 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.35 (authorityKeyIdentifier) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 8cf4d9930a47bc00a04ace4b756ea0b6b0b27efc . . . . . . . . . . . . . . . . [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 (3 bits) 05a0 . . . . . . . . . . . . . . . . [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 2.5.29.17 (subjectAltName) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (23 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'community.cs.hku.hk' . . . . . . . . . . . . . . . . [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 (58 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://gtssldv-crl.geotrust.com/crls/gtssldv.crl' . . . . . . . . . . . . . . . . [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) f7df36d13bbab47eed72f4f02092c2540abbd777 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19 (basicConstraints) . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (2 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1 (authorityInfoAccess) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (59 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2 (caIssuers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://gtssldv-aia.geotrust.com/gtssldv.crt' . . . . [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 (2048 bits) 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