osantd.osa.cuhk.edu.hk

Issued by Hongkong Post e-Cert CA 1 - 14

About this certificate


This digital certificate with serial number 03:99:7c:ff:a6:49:ec:2b:63:5e:15:33:c0:03:18:45:c9:ce:c2:8f was issued on by Hongkong Post .

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 or stateOrProvinceName is required if organizationName is set
  • ERROR: stateOrProvinceName is required if organizationName is set

Hongkong Post e-Cert (Server)

Organization: Hongkong Post e-Cert (Server)
Organization unit: 0001969311
Organization unit: 000000000000000000000000CUHK-CHAPTER-1109-ITSC
Organization unit: THE CHINESE UNIVERSITY OF HONG KONG
Organization unit: INFORMATION TECHNOLOGY SERVICES CENTRE
Country: HK

Hongkong Post

Organization: Hongkong Post
Country: HK

Time since certificate expired

This certificate has expire since

Certificate Details

Serial Number (hex): 03:99:7c:ff:a6:49:ec:2b:63:5e:15:33:c0:03:18:45:c9:ce:c2:8f
Serial Number (int): 20549875244341482080446043403346570546412176015
Serial Number lenght: 154 bits, 20 octets

SubjectKeyId: f7:fd:77:21:0f:97:ed:7b:32:ac:c3:5e:5b:16:2e:c1:dd:70:bc:1f
AuthorityKeyId: 5b:37:7d:2d:b2:98:96:27:92:f7:1a:44:fc:37:a6:93:9e:5d:50:e4

Fingerprint (sha1): a9:23:e8:9c:ae:a9:65:38:12:f4:56:3d:4d:d8:fd:65:20:a9:b2:7a
Fingerprint (sha256): 74:fb:2a:b4:3f:e1:46:91:ca:4f:ac:ee:a3:cd:a1:54:ff:fd:1a:7c:98:a9:9f:93:77:97:99:e5:82:24:e1:87

Issuing Certificate URL: http://www1.hongkongpost.gov.hk/root/ecert_ca_1-14.crt

Revocation information

CRL Distribution Point: http://crl1.hongkongpost.gov.hk/crl/eCertCA1-14CRL1.crl

Check the revocation status for the current certificate on osantd.osa.cuhk.edu.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

SHA256 with RSA



Key Usage

Digital Signature
Key Encipherment

Extended Key Usages

Server Authentication
Client Authentication

Extensions

9 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: osantd.osa.cuhk.edu.hk

Certificate

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

Certificate (PEM)

-----BEGIN CERTIFICATE----- MIIFYjCCBEqgAwIBAgIUA5l8/6ZJ7CtjXhUzwAMYRcnOwo8wDQYJKoZIhvcNAQEL BQAwTjELMAkGA1UEBhMCSEsxFjAUBgNVBAoTDUhvbmdrb25nIFBvc3QxJzAlBgNV BAMTHkhvbmdrb25nIFBvc3QgZS1DZXJ0IENBIDEgLSAxNDAeFw0xNTAzMTAwNzU5 NThaFw0xNjAzMTAwNzU5NThaMIIBAzELMAkGA1UEBhMCSEsxJjAkBgNVBAoTHUhv bmdrb25nIFBvc3QgZS1DZXJ0IChTZXJ2ZXIpMRMwEQYDVQQLEwowMDAxOTY5MzEx MTcwNQYDVQQLEy4wMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDBDVUhLLUNIQVBURVIt MTEwOS1JVFNDMSwwKgYDVQQLEyNUSEUgQ0hJTkVTRSBVTklWRVJTSVRZIE9GIEhP TkcgS09ORzEvMC0GA1UECxMmSU5GT1JNQVRJT04gVEVDSE5PTE9HWSBTRVJWSUNF UyBDRU5UUkUxHzAdBgNVBAMTFm9zYW50ZC5vc2EuY3Voay5lZHUuaGswggEiMA0G CSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDbqL66+x/ME7usHplh8jezq/Q7XAwr EqHvXwoch5AlLdHoCjh9gWB4IlAG2qHqHVnH7A4x0AYk8SdgzgPxlL3xkgH0kVjo H+/ECG+Z2sP7UcVYOMSZ8u5rAIZ9bIaWoFlvOnE6D0/iqokROvtXO3K5M+bY7Zmo PKD1LISpT9LoOqag3m2yB0+rojYVtZF0RvKKyLKbqWxkUyUbcpn3KuE46SBiq1B/ k/PhbISqzlrz9vnjiERuZg/YNIwb8gtNOFvzbIhcbdKAqtWu9qRpVPIyOWhl3lJQ 9Ubkufh6Hcn2deJIAmptvacRNNICXVsa0gm/zCM5LsSzU+yljS6FHoZ1AgMBAAGj ggF/MIIBezA+BgNVHSAENzA1MDMGCisGAQQB/R4BAR0wJTAjBggrBgEFBQcCARYX d3d3Lmhvbmdrb25ncG9zdC5nb3YuaGswIQYDVR0RBBowGIIWb3NhbnRkLm9zYS5j dWhrLmVkdS5oazAJBgNVHRMEAjAAMFIGCCsGAQUFBwEBBEYwRDBCBggrBgEFBQcw AoY2aHR0cDovL3d3dzEuaG9uZ2tvbmdwb3N0Lmdvdi5oay9yb290L2VjZXJ0X2Nh XzEtMTQuY3J0MA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYI KwYBBQUHAwIwHwYDVR0jBBgwFoAUWzd9LbKYlieS9xpE/Demk55dUOQwSAYDVR0f BEEwPzA9oDugOYY3aHR0cDovL2NybDEuaG9uZ2tvbmdwb3N0Lmdvdi5oay9jcmwv ZUNlcnRDQTEtMTRDUkwxLmNybDAdBgNVHQ4EFgQU9/13IQ+X7XsyrMNeWxYuwd1w vB8wDQYJKoZIhvcNAQELBQADggEBAGArFeLnqbHCdVeh8zd6aKD3F3c9vNczv1mD JbYcnEQUWV4KnqCJdLjLbayTrKuzRURhJW2dmBzsnmqNkeen+S3886by9YIg1W47 aCb6ok2riNStU/z+LERJiaD6ISWZPQrA0GMcm/0g9kCiI5W/DWNjB+73AoL4ngnK 98LzCEi8ywEINns6y86gT54s+MBmN/O9OV5qSHHiH3fZcGAYMEAzuUhLIhAHybuG m/Gjbcs8S06QItRh6gY+YRNvtvrdZW6fvqKDiFYtotpalWFxHJO72TudnrZJ2LlM r3fdx9+pdq/UT3F9V+KonZM9apFC/+EbBb+a5IyQqXWMd85oENk= -----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA26i+uvsfzBO7rB6ZYfI3 s6v0O1wMKxKh718KHIeQJS3R6Ao4fYFgeCJQBtqh6h1Zx+wOMdAGJPEnYM4D8ZS9 8ZIB9JFY6B/vxAhvmdrD+1HFWDjEmfLuawCGfWyGlqBZbzpxOg9P4qqJETr7Vzty uTPm2O2ZqDyg9SyEqU/S6DqmoN5tsgdPq6I2FbWRdEbyisiym6lsZFMlG3KZ9yrh OOkgYqtQf5Pz4WyEqs5a8/b544hEbmYP2DSMG/ILTThb82yIXG3SgKrVrvakaVTy MjloZd5SUPVG5Ln4eh3J9nXiSAJqbb2nETTSAl1bGtIJv8wjOS7Es1PspY0uhR6G dQIDAQAB -----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 20549875244341482080446043403346570546412176015 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption) . . . . . . . . . . . . [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 '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 'Hongkong Post' . . . . . . . . . . . . [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 'Hongkong Post e-Cert CA 1 - 14' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2015-03-10 07:59:58 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2016-03-10 07:59:58 +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 2.5.4.6 (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 'Hongkong Post e-Cert (Server)' . . . . . . . . . . . . [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 '0001969311' . . . . . . . . . . . . [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 '000000000000000000000000CUHK-CHAPTER-1109-ITSC' . . . . . . . . . . . . [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 'THE CHINESE UNIVERSITY OF HONG KONG' . . . . . . . . . . . . [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 'INFORMATION TECHNOLOGY SERVICES CENTRE' . . . . . . . . . . . . [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 'osantd.osa.cuhk.edu.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 27729400068415054021372409897194755623914943465151494900776019449863329338688315845052153646174928085153378201858618888289666191090904123582233113532561350293912158246456470257361932515349988785067619495175006069305116590700782567316967599101946932483409783207253000212749403455688884491817826845108897374759131058291991993172229780604769354914400867591055405803211724442939831880394891177455332510313968572640175460211876296857596738959612406467782177405119965090206673774203188548848589510058369957222157810738533121969616698894241120387077724412000450158459405198755837837764345394173814690593804968032255973688949 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.32 (certificatePolicies) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (55 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.16030.1.1.29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.1 (cps) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:22|false] IA5String 'www.hongkongpost.gov.hk' . . . . . . . . . . . . . . . . [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 (26 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'osantd.osa.cuhk.edu.hk' . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19 (basicConstraints) . . . . . . . . . . . . . . . . . . . . [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 (70 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://www1.hongkongpost.gov.hk/root/ecert_ca_1-14.crt' . . . . . . . . . . . . . . . . [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 2.5.29.35 (authorityKeyIdentifier) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 5b377d2db298962792f71a44fc37a6939e5d50e4 . . . . . . . . . . . . . . . . [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 (65 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://crl1.hongkongpost.gov.hk/crl/eCertCA1-14CRL1.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) f7fd77210f97ed7b32acc35e5b162ec1dd70bc1f . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption) . . . . . . . . [c:0|t:5|false] NULL . . . . [c:0|t:3|false] BIT STRING (2048 bits) 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