qs1.itsc.cuhk.edu.hk

Issued by Hongkong Post e-Cert CA 1 - 14

About this certificate


This digital certificate with serial number 4c:5a:94:64:9e:02:1e:b2:22:bd:a0:04:6a:54:7b:80:41:00:34:0a 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: 0001976593
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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Certificate Details

Serial Number (hex): 4c:5a:94:64:9e:02:1e:b2:22:bd:a0:04:6a:54:7b:80:41:00:34:0a
Serial Number (int): 435903292507063183048193743668914395937599665162
Serial Number lenght: 159 bits, 20 octets

SubjectKeyId: 99:21:8e:4b:ff:e1:30:fd:4f:88:55:c7:aa:68:b5:80:94:be:1b:1e
AuthorityKeyId: 5b:37:7d:2d:b2:98:96:27:92:f7:1a:44:fc:37:a6:93:9e:5d:50:e4

Fingerprint (sha1): 91:76:4f:d0:33:6f:14:c2:6c:04:52:72:c4:a8:de:61:b0:c5:5d:aa
Fingerprint (sha256): f5:2d:d1:00:71:09:75:34:9a:cc:b6:21:b9:51:32:e6:ad:56:ba:f7:16:ed:2f:fc:3b:26:ca:86:58:57:30:38

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 qs1.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: qs1.itsc.cuhk.edu.hk

Certificate

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

Certificate (PEM)

-----BEGIN CERTIFICATE----- MIIFXjCCBEagAwIBAgIUTFqUZJ4CHrIivaAEalR7gEEANAowDQYJKoZIhvcNAQEL BQAwTjELMAkGA1UEBhMCSEsxFjAUBgNVBAoTDUhvbmdrb25nIFBvc3QxJzAlBgNV BAMTHkhvbmdrb25nIFBvc3QgZS1DZXJ0IENBIDEgLSAxNDAeFw0xNTA4MjcwNjE3 MDFaFw0xODA4MjcwNjE3MDFaMIIBATELMAkGA1UEBhMCSEsxJjAkBgNVBAoTHUhv bmdrb25nIFBvc3QgZS1DZXJ0IChTZXJ2ZXIpMRMwEQYDVQQLEwowMDAxOTc2NTkz MTcwNQYDVQQLEy4wMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDBDVUhLLUNIQVBURVIt MTEwOS1JVFNDMSwwKgYDVQQLEyNUSEUgQ0hJTkVTRSBVTklWRVJTSVRZIE9GIEhP TkcgS09ORzEvMC0GA1UECxMmSU5GT1JNQVRJT04gVEVDSE5PTE9HWSBTRVJWSUNF UyBDRU5UUkUxHTAbBgNVBAMTFHFzMS5pdHNjLmN1aGsuZWR1LmhrMIIBIjANBgkq hkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0WK/z+uUnRSD4DFidsXZ0OMALqwVCa4e 8NUoH9p7AkdZewffPrKCJLSRrdIoH6QmkXD7hyarJhBRzu3Oz69iF879k+9+JjkU KZgfnR8PSXtagjVKZHEeHm2DQ57keJlHmuLiL20VMbShahCzZvlEu/dOWj1cFaA3 fByhME5YDVEfef6/mlg4jE2hakv1hXunYz75TruKM/bMyiuaOTYghfymmf4bQXUr hqEn0MRx0p2pndLyG+6PsQGXxWYzHYQbPTnbdeOr+WnVvebNvj6K47MXbdDPjFZ+ n6AC8a3SKnbL5sJ+cI8v8irkwCi6ubnzPyv5Z/Yj1E4wbPKKVRsgdQIDAQABo4IB fTCCAXkwPgYDVR0gBDcwNTAzBgorBgEEAf0eAQEeMCUwIwYIKwYBBQUHAgEWF3d3 dy5ob25na29uZ3Bvc3QuZ292LmhrMB8GA1UdEQQYMBaCFHFzMS5pdHNjLmN1aGsu ZWR1LmhrMAkGA1UdEwQCMAAwUgYIKwYBBQUHAQEERjBEMEIGCCsGAQUFBzAChjZo dHRwOi8vd3d3MS5ob25na29uZ3Bvc3QuZ292LmhrL3Jvb3QvZWNlcnRfY2FfMS0x NC5jcnQwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEF BQcDAjAfBgNVHSMEGDAWgBRbN30tspiWJ5L3GkT8N6aTnl1Q5DBIBgNVHR8EQTA/ MD2gO6A5hjdodHRwOi8vY3JsMS5ob25na29uZ3Bvc3QuZ292LmhrL2NybC9lQ2Vy dENBMS0xNENSTDEuY3JsMB0GA1UdDgQWBBSZIY5L/+Ew/U+IVceqaLWAlL4bHjAN BgkqhkiG9w0BAQsFAAOCAQEAg5Fqq55f68+lTyCik0hosnCiUnEBAWkYztaH086H v8jjmFfD92c7YEaItbjC3Bucc/5QUf8qnkpT9ZDHtPMAV+1Xx2oQLeUWNFbwiSBM aUOIx8PPKh+cfrm8hTQrehxxD/5Q+wXN5Mdf/lA9y47DBR1QzYOUdjHWjR2A6gFu SCB0df9iphoCWDAUqyV1YKcddI5B0gmCKuDztH/ivCHi7Z09hmkT67uV96idsprf K0JnKOnOMNTZ/+OPPZiiZqNhGnkSFBqdVf4cB5ytu3zKnnRls/yvO4oW0ZI6V81h OuhtTZTs0X6GUVYM77DBjirjwLB3TNnF6/RfuYl1DC7ktQ== -----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0WK/z+uUnRSD4DFidsXZ 0OMALqwVCa4e8NUoH9p7AkdZewffPrKCJLSRrdIoH6QmkXD7hyarJhBRzu3Oz69i F879k+9+JjkUKZgfnR8PSXtagjVKZHEeHm2DQ57keJlHmuLiL20VMbShahCzZvlE u/dOWj1cFaA3fByhME5YDVEfef6/mlg4jE2hakv1hXunYz75TruKM/bMyiuaOTYg hfymmf4bQXUrhqEn0MRx0p2pndLyG+6PsQGXxWYzHYQbPTnbdeOr+WnVvebNvj6K 47MXbdDPjFZ+n6AC8a3SKnbL5sJ+cI8v8irkwCi6ubnzPyv5Z/Yj1E4wbPKKVRsg 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 435903292507063183048193743668914395937599665162 . . . . . . . . [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 2015-08-27 06:17:01 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-08-27 06:17:01 +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 '0001976593' . . . . . . . . . . . . [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 'qs1.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 26432500816039291763091358317982241064017380399060237451039463021659773213988279508344769472137875978923356446810907312370835199600552127505832923749283994627887601000918083452084634730661354419962969109685053249585438853430727777010999887353880775612191207047383264613322451539838352785115335409696162881867816580961709513616179593601165059182790062827100757703296983015214659775494523491496673650284954013195305843754864164238628510041845054471587165543304846675093248343787601120219146605034877257074303452632410720907713566500213113536058575043825321060803258229151209931227393229448961176828163835084815529091189 . . . . . . . . . . . . . . . . . . . . [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 1.3.6.1.4.1.16030.1.1.30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 'qs1.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) 99218e4bffe130fd4f8855c7aa68b58094be1b1e . . . . [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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