ctihe.edu.hk

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:3b:77:41:ca:6b:f2:9b:e3:bb:f5:0e:0f:da:f0:7e:0d:82 was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. 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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=ctihe.edu.hk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:3b:77:41:ca:6b:f2:9b:e3:bb:f5:0e:0f:da:f0:7e:0d:82
Serial Number (int): 281572037180009556194869114224329638153602
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: d8:7f:57:fa:f0:0a:bd:fc:51:ae:9b:38:cf:8f:bd:15:38:12:63:e2
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 71:3f:d1:ef:75:90:12:16:88:08:ed:00:02:5a:43:1f:61:51:21:f3
Fingerprint (sha256): b2:5a:28:e3:8e:e7:a4:f2:37:2c:17:3b:3c:71:7c:51:cd:f4:43:55:de:85:9f:01:90:9e:1e:32:ed:45:bc:92

Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x3.letsencrypt.org

Check the revocation status for certificate ctihe.edu.hk

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for ctihe.edu.hk

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

ctihe.edu.hk
www.ctihe.edu.hk

Other certificates including the domain name ctihe.edu.hk

(limited to 100 certificates)
www.ctihe.edu.hk
exmail.hkct.edu.hk
ctihe.edu.hk
*.ctihe.edu.hk
ctihe.edu.hk
enrol.ctihe.edu.hk
enrol.ctihe.edu.hk
enrol.ctihe.edu.hk
enrol.ctihe.edu.hk
www.ctihe.edu.hk
exmail.hkct.edu.hk
ctihe.edu.hk
ctihe.edu.hk
www.ctihe.edu.hk
www.ctihe.edu.hk
*.ctihe.edu.hk
enrol.ctihe.edu.hk
exmail.hkct.edu.hk
exmail.hkct.edu.hk
exmail.hkct.edu.hk

Certificate

The complete raw certificate details for ctihe.edu.hk in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAgqVXWrd4AyrfWgcz09aq
pBBqZEATFMlVNjDh66ZFky0TgJ2779zESZCi7qAoPDBC8iZRAtBRhqzAtTk5guYL
BIrR44pf1qPuqC2xvq6VlUJaB472BwgniWiXVcg0e9F0P7bRt3kaS895AizUHULY
+zL+1/RiRLOmZLj/bNV1aOvMpnYVKmQnBCy9NISWIThkIgzuxqy88XFCAqbiVz8W
Dx11cava09UZBPFE13UY2eZCsfJb/FU26d3v4AOqcLCBXtl5mclxGvNSW35Dn0LS
bWRvsPl+qg9xTocqKmULWP3DJLtu69Lj/vn/KEtyzuYFebMQC9bVpDt7GoPEfbfy
LwIDAQAB
-----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 281572037180009556194869114224329638153602
 . . . . . . . . [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 '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 'Let's Encrypt'
 . . . . . . . . . . . . [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 'Let's Encrypt Authority X3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-12-05 13:11:54 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-03-05 13:11:54 +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 2.5.4.3 (commonName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'ctihe.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 16492512443871893109080838924666904816886767636944983985483468938296933568784897282511149710755751143047167729887778889764075930666463227315388675860089422441572368435108890824115321546924025408681404940726324495254890024082319725024732702333387535750463530532377602580985145314647674719791029612798403848601482030719714249724053771606398882926031698274231866144610057462364757068631326473094690583981082515080439024610513559260064914945517401405468737131828982283714944172607739253892227982761364685209391138307647781224997768508464925919487101611901133082012906424181888294951462130470359856113549321352777653809711
 . . . . . . . . . . . . . . . . . . . . [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 (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 2.5.29.19 (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 2.5.29.14 (subjectKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							d87f57faf00abdfc51ae9b38cf8fbd15381263e2
 . . . . . . . . . . . . . . . . [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 a84a6a63047dddbae6d139b7a64565eff3a8eca1
 . . . . . . . . . . . . . . . . [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 (99 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.1 (ocsp)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://ocsp.int-x3.letsencrypt.org'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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://cert.int-x3.letsencrypt.org/'
 . . . . . . . . . . . . . . . . [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 (34 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ctihe.edu.hk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.ctihe.edu.hk'
 . . . . . . . . . . . . . . . . [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 (69 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.23.140.1.2.1 (Domain Validation Certificates Policy)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.44947.1.1.1
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 'http://cps.letsencrypt.org'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007600747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc56000001677eb5f9b6000004030047304502207581aa1422005c90bf6314f5cab3b5d45bcac928c10d0ad3627307885f78b867022100cad275c89356570f8933ab577b7ae06a11f2834df3200213405a49aca8c7de51007500293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f478000001677eb5fbe50000040300463044022046fd789973caec1d13e08fe19a89218818d0d45869ce815889d163f9f2c0485802207de81443690c5dfd3281f93e79f2a16b7dbbf35b1c71fdc9602094ed1dd69684
 . . . . [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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