secure.jcu.edu.sg

Issued by R3

About this certificate

This digital certificate with serial number 04:a6:dd:3f:e2:ac:53:2f:03:e2:21:73:cd:5a:eb:c7:f2:fc was issued on by Let's Encrypt.

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=secure.jcu.edu.sg

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:a6:dd:3f:e2:ac:53:2f:03:e2:21:73:cd:5a:eb:c7:f2:fc
Serial Number (int): 405230107735164884094866271137121840919292
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 8f:5b:c1:bb:51:57:bf:da:d6:ff:96:60:08:ba:44:24:4d:61:9f:55
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 82:7a:32:cb:4f:c7:34:10:e3:41:c1:97:04:b7:71:72:bb:ca:a8:af
Fingerprint (sha256): 03:7b:da:72:bc:cc:68:78:af:c8:8b:d1:22:47:5c:d2:a8:42:7a:a6:f0:d5:77:e8:af:e5:dd:46:c6:f4:48:08

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate secure.jcu.edu.sg

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for secure.jcu.edu.sg

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

secure.jcu.edu.sg

Other certificates including the domain name jcu.edu.sg

(limited to 100 certificates)
secure.jcu.edu.sg
studygrant.jcu.edu.sg
webmail.jcu.edu.sg
afm.jcu.edu.sg
afm.jcu.edu.sg
grc.jcu.edu.sg
aquaculture.jcu.edu.sg
studygrant.jcu.edu.sg
tourism.jcu.edu.sg
earlychildhood.jcu.edu.sg
abc.jcu.edu.sg
openhouse.jcu.edu.sg
grc.jcu.edu.sg
*.jcu.edu.sg
grc.jcu.edu.sg
grc-dev.jcu.edu.sg
grc-dev.jcu.edu.sg
secure.jcu.edu.sg
portal.jcu.edu.sg
secure.jcu.edu.sg
twmtest.jcu.edu.sg
afm.jcu.edu.sg
edockets.jcu.edu.sg
grc.jcu.edu.sg
evserver1.jcu.edu.sg
careers.jcu.edu.sg
enquiry.jcu.edu.sg
psychology.jcu.edu.sg
www.jcu.edu.au
environmentalscience.jcu.edu.sg
www2.jcu.edu.sg
www.jcu.edu.sg
afm.jcu.edu.sg
secure.jcu.edu.sg
grc.jcu.edu.sg
secure.jcu.edu.sg
secure.jcu.edu.sg
secure.jcu.edu.sg
grc-dev.jcu.edu.sg
afm.jcu.edu.sg
grc.jcu.edu.sg
grc.jcu.edu.sg
afm.jcu.edu.sg
psychology.jcu.edu.sg
psychology.jcu.edu.sg
webservices.jcu.edu.sg
enquiry.jcu.edu.sg
secure.jcu.edu.sg
earlychildhood.jcu.edu.sg
www.jcu.edu.au
*.jcu.edu.sg
WEBMAIL.JCU.EDU.SG
afm.jcu.edu.sg
openhouse.jcu.edu.sg
secure.jcu.edu.sg
grc-dev.jcu.edu.sg
webservices.jcu.edu.sg
counselling.jcu.edu.sg
afm.jcu.edu.sg
grc.jcu.edu.sg
secure.jcu.edu.sg
parentsforum.jcu.edu.sg
studentweb.jcu.edu.sg
afm.jcu.edu.sg
webservices.jcu.edu.sg
www.jcu.edu.au
aquaculture.jcu.edu.sg
grc-dev.jcu.edu.sg
grc-dev.jcu.edu.sg
psychology.jcu.edu.sg
abc.jcu.edu.sg
secure.jcu.edu.sg
grc.jcu.edu.sg
secure.jcu.edu.sg
www2.jcu.edu.sg
www.jcu.edu.au
edockets.jcu.edu.sg
www.jcu.edu.au
grc.jcu.edu.sg
clinicalpsychology.jcu.edu.sg
careers.jcu.edu.sg
twmtest.jcu.edu.sg
clinicalpsychology.jcu.edu.sg
tourism.jcu.edu.sg
secure.jcu.edu.sg
grc.jcu.edu.sg
afm.jcu.edu.sg
www2.jcu.edu.sg
web.jcu.edu.sg
afm.jcu.edu.sg
twmtest.jcu.edu.sg
environmentalscience.jcu.edu.sg
webservices.jcu.edu.sg
*.jcu.edu.sg
webservices.jcu.edu.sg
grc-dev.jcu.edu.sg
jcu.edu.sg
virtualopenhouse.jcu.edu.sg
edockets.jcu.edu.sg
afm.jcu.edu.sg

Certificate

The complete raw certificate details for secure.jcu.edu.sg in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAw2zP/hIQ+Q5SdiQGtrVE
/VI05quPXpfa0DNW22LrcsEgunyyYoC5SXKuNHCkIO8DtLEchDXXogH5TKjs6irz
ugto8KlFz1xfDTBA/JFxIgzfNg3WniwYpqMW8MJucUdYbyPStIs9TXB8vSdtUVQp
NC9R3ISeOoF0MRM7LgNtcrCaZBvgSxlRYm+E/IFF2Do4oVvRK1jr16nBY0fiUO69
Obk6BKcfwCosuqf6s8cxIa3RRIU1mg68Ieon/QjgHUh2xc82dyHEoD7LvVaAC9Kt
1V5nskFutIk7iZ+43RbPQxlmZ7zId/0B+cAKSbv0UdwyFSG9tH9YCvYL9grGNH8R
owIDAQAB
-----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 405230107735164884094866271137121840919292
 . . . . . . . . [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 'R3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-07-27 03:36:15 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-10-25 03:36:14 +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 'secure.jcu.edu.sg'
 . . . . . . . . [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 24670126897453969610773450820645910746575529087956143517832764387139960293189472862191558801832128877804327036715959633412393895130287493936236666523895790966396304136329771765563101204821532597600216294087802559158829298400742213939879070082722266957465133134110749871630067756942012073335090560711857611786393322285279854301550001258599899200460999127906928641337217690865064771043654801884505570332897959538436144546762122154528801109513750198244964582643179750667086396106375143836556924166785295817314580432082662783358431079599828919894056615848780645279175679733453829641835872934063643137448818264521207386531
 . . . . . . . . . . . . . . . . . . . . [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)
							8f5bc1bb5157bfdad6ff966008ba44244d619f55
 . . . . . . . . . . . . . . . . [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 142eb317b75856cbae500940e61faf9d8b14c2c6
 . . . . . . . . . . . . . . . . [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 (73 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://r3.o.lencr.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://r3.i.lencr.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 (21 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'secure.jcu.edu.sg'
 . . . . . . . . . . . . . . . . [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 (12 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007600b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb4990000018995a217b20000040300473045022100a6be7a690de706f72de034e105bf810f3e0b85c738b4ecc76689de84ee25f14f0220677573880a30ca6ae151314fd62c4eca43a5fd311c39b1906c5caf00cd97047d007600adf7befa7cff10c88b9d3d9c1e3e186ab467295dcfb10c24ca858634ebdc828a0000018995a2181800000403004730450220347eba35cf535aecd7b0312a9a9c78a565dc91763ce8f2cd59c308b402d58fe9022100d35af0fe4edf046ff8c506d0a2f9d3b4b52ec5ac6bd98abd3a4f619866820c3b
 . . . . [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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