ess.itsc.cuhk.edu.hk

Issued by Hongkong Post e-Cert CA 1 - 14

About this certificate


This digital certificate with serial number 09:00:50:28:c9:f9:92:bc:ab:78:9a:22:01:88:62:ad:f7:77:e2:78 was issued on by Hongkong Post .

This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com.

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: 0001967473
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

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This certificate will expire on

Certificate Details

Serial Number (hex): 09:00:50:28:c9:f9:92:bc:ab:78:9a:22:01:88:62:ad:f7:77:e2:78
Serial Number (int): 51387899800054458625676247355414870755334677112
Serial Number lenght: 156 bits, 20 octets

SubjectKeyId: 1a:87:94:60:0d:2b:73:fa:b0:f5:eb:83:0a:f2:42:57:1f:e3:40:51
AuthorityKeyId: 5b:37:7d:2d:b2:98:96:27:92:f7:1a:44:fc:37:a6:93:9e:5d:50:e4

Fingerprint (sha1): ee:09:5e:c7:3e:c3:88:5c:de:c3:67:87:72:cb:66:bc:41:14:d6:2e
Fingerprint (sha256): 16:79:d7:97:b9:98:c0:05:c0:ab:6d:aa:03:3f:e8:6a:0a:5d:db:ff:4f:6e:47:7c:cb:1c:a7:fc:e1:79:a1:cf

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 ess.itsc.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: ess.itsc.cuhk.edu.hk

Certificate

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

Certificate (PEM)

-----BEGIN CERTIFICATE----- MIIFXjCCBEagAwIBAgIUCQBQKMn5kryreJoiAYhirfd34ngwDQYJKoZIhvcNAQEL BQAwTjELMAkGA1UEBhMCSEsxFjAUBgNVBAoTDUhvbmdrb25nIFBvc3QxJzAlBgNV BAMTHkhvbmdrb25nIFBvc3QgZS1DZXJ0IENBIDEgLSAxNDAeFw0xNTAxMDgwNzE1 MTFaFw0xODAxMDgwNzE1MTFaMIIBATELMAkGA1UEBhMCSEsxJjAkBgNVBAoTHUhv bmdrb25nIFBvc3QgZS1DZXJ0IChTZXJ2ZXIpMRMwEQYDVQQLEwowMDAxOTY3NDcz MTcwNQYDVQQLEy4wMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDBDVUhLLUNIQVBURVIt MTEwOS1JVFNDMSwwKgYDVQQLEyNUSEUgQ0hJTkVTRSBVTklWRVJTSVRZIE9GIEhP TkcgS09ORzEvMC0GA1UECxMmSU5GT1JNQVRJT04gVEVDSE5PTE9HWSBTRVJWSUNF UyBDRU5UUkUxHTAbBgNVBAMTFGVzcy5pdHNjLmN1aGsuZWR1LmhrMIIBIjANBgkq hkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAp3fhcEPoSavXz/4bMOKaYHcH+Uh9c2E8 j3PPyxbqV23M0jDfJ7/3V0BQO53oJgygYsNgPuuAOLAowm2lL2/ftLRIyfVuQPsG HY086KRsR3dt9MQ0JoGYMLwthC0gwq4+BvTo0JF6/1VKebpPv+AaknvO5RXN3VGP CN2lfXyP8k7rLQpM1V/aFU2n/8/Wxuqx4Qo+nY4N6y91rRctD2CQ8PiY+ADzoqHd tDQTqrCb4YeKgP1t+9mY+wc6C/+elJ0Mc5QhorjW6Pc5HpSrrUvkdpAaXSA8uuyn 32uYoREDLw9C3lEmlVpTzY6RDCtiRnBEg7Deeh8twRmflPbr/yvPfwIDAQABo4IB fTCCAXkwPgYDVR0gBDcwNTAzBgorBgEEAf0eAQEcMCUwIwYIKwYBBQUHAgEWF3d3 dy5ob25na29uZ3Bvc3QuZ292LmhrMB8GA1UdEQQYMBaCFGVzcy5pdHNjLmN1aGsu ZWR1LmhrMAkGA1UdEwQCMAAwUgYIKwYBBQUHAQEERjBEMEIGCCsGAQUFBzAChjZo dHRwOi8vd3d3MS5ob25na29uZ3Bvc3QuZ292LmhrL3Jvb3QvZWNlcnRfY2FfMS0x NC5jcnQwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEF BQcDAjAfBgNVHSMEGDAWgBRbN30tspiWJ5L3GkT8N6aTnl1Q5DBIBgNVHR8EQTA/ MD2gO6A5hjdodHRwOi8vY3JsMS5ob25na29uZ3Bvc3QuZ292LmhrL2NybC9lQ2Vy dENBMS0xNENSTDEuY3JsMB0GA1UdDgQWBBQah5RgDStz+rD164MK8kJXH+NAUTAN BgkqhkiG9w0BAQsFAAOCAQEAUj0Vp1b3KzsN5NumiGXKw/2//v8EU/aMWZNvO2Fk UOz+5TZQT5tvWp5M1ZGsuvlE6c9JrsfwFGhY+WsyqaCjXcRySphM9XEKMH6687lK cOMDVxAJayLetyNasrSeZ82Qc7CtE4PK+adDCAu62P4ak3nkSEzcrBevCDvsKzTd ohBohKSQhXA0MJpwEO8cYTnJz/VxbLv0anHZd4NdoQ0ku3ioiue8xRUqtPVgfnHV xMn34vP3pGZoNK541QhZM+hFrN9eer+5r5yvR1QVGym3k9PSiAnc3RZaqglHcosq X2FgD+yNcieH4T5/oRU3/RUMX6EwiyU07ynac2MoOknYUQ== -----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAp3fhcEPoSavXz/4bMOKa YHcH+Uh9c2E8j3PPyxbqV23M0jDfJ7/3V0BQO53oJgygYsNgPuuAOLAowm2lL2/f tLRIyfVuQPsGHY086KRsR3dt9MQ0JoGYMLwthC0gwq4+BvTo0JF6/1VKebpPv+Aa knvO5RXN3VGPCN2lfXyP8k7rLQpM1V/aFU2n/8/Wxuqx4Qo+nY4N6y91rRctD2CQ 8PiY+ADzoqHdtDQTqrCb4YeKgP1t+9mY+wc6C/+elJ0Mc5QhorjW6Pc5HpSrrUvk dpAaXSA8uuyn32uYoREDLw9C3lEmlVpTzY6RDCtiRnBEg7Deeh8twRmflPbr/yvP fwIDAQAB -----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 51387899800054458625676247355414870755334677112 . . . . . . . . [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 2015-01-08 07:15:11 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-01-08 07:15:11 +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 '0001967473' . . . . . . . . . . . . [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 'ess.itsc.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 21140912265958498065247173053177222440094353455749167291889169028747763037373297116147005739223232089169529255683994381330810652553932545277868960233670148313825511133650111229600706931472409563001976011134796357512020607454200579902699036816999306060145863055689884591246072061516283039593401150832306377923003429742858766963661856805905057188181461190920938968171395414119323474465904333927479195275648480163645587465719507423622352336771927392485233600331918354790938514872016046785230534371809393037569753667114277030292482307087078734188912925741010206327130621951786684812899791447712497173602911776504258744191 . . . . . . . . . . . . . . . . . . . . [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 1.3.6.1.4.1.16030.1.1.28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 (24 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ess.itsc.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) 1a8794600d2b73fab0f5eb830af242571fe34051 . . . . [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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