onlinelearn.sim.edu.sg

Issued by R3

About this certificate

This digital certificate with serial number 03:ae:ef:b6:51:55:f2:3a:33:d9:26:f4:da:4d:37:41:85:76 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=onlinelearn.sim.edu.sg

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:ae:ef:b6:51:55:f2:3a:33:d9:26:f4:da:4d:37:41:85:76
Serial Number (int): 320864621778229418259169800027606507160950
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: f5:98:25:2d:5d:f3:c9:bc:d2:9b:a7:db:8a:d2:33:97:93:46:6a:64
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): b8:2e:0b:a0:17:fa:1f:27:1e:3b:3b:b1:ba:bc:1b:51:6b:52:97:02
Fingerprint (sha256): 19:c0:4d:70:95:33:26:af:58:db:76:a1:97:ca:18:9f:8b:68:02:93:f3:69:20:88:f8:27:67:a4:60:62:7e:32

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

Revocation information

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

Check the revocation status for certificate onlinelearn.sim.edu.sg

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for onlinelearn.sim.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

onlinelearn.sim.edu.sg

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Certificate

The complete raw certificate details for onlinelearn.sim.edu.sg in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA09MLdVHjeCM1ArbP3KQ0
X5TdKjb79YAPBOebm6JqCi5UJPDwL7G0E6zCM2urf9WihLl8IXUNkhaDFeuwp/BR
nLdZhe0UOZ7VpWLVieyWraECbRWiuqP9OXHCubSkjgUIas65giV2aOAQOwQJKMZY
s86efAuakGf6Vc9Xfl0svjk5evWJVtTGsZQXB0q9Zi1Kb6XnltUZC/77hpkXJU7s
yDH2TIYDe7W3A4WDARF99B5js8gRpmpK3UKIwhIcEWNkh15hZkxYfl5NAneehv1r
2u1RQwJH6I+BGVij5+Ru2s8Qfa2gn8j2HizjfLd0yPaGPJMTyllqPmDFUCVSH5lX
4wIDAQAB
-----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 320864621778229418259169800027606507160950
 . . . . . . . . [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 2023-09-09 00:54:10 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-12-08 00:54:09 +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 'onlinelearn.sim.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 26740352397200382088774816297581598245165408830831544523919699145978087506035561112969631368856371513573492880391613856071545522793178950257615306769868303688707684619726889007097464088923993642604107613304319751959785624345271347010034219395912487025887536083669324466813384960602914825451355267311282024615624290703052104972391115601369333919063362004266985476886961587471901194509607198322176793636805082006191365041866432723083620711473798319959413997400803080584919498090687532743271341046083607087561899862940913532069054442005583752646896963259975605028213858351413106217967279191694957438243512360546330040291
 . . . . . . . . . . . . . . . . . . . . [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)
							f598252d5df3c9bcd29ba7db8ad2339793466a64
 . . . . . . . . . . . . . . . . [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 (26 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'onlinelearn.sim.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)
							00f0007600b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb4990000018a77a583e200000403004730450220624192f51b783df553163955b618549cc51db9787ce2d9c77a9e4ed84852dc85022100edf05263be3c4cd557ecba3a832e7941420ee6d290677a7c3bcab4f2e941392d0076007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb520000018a77a583ea000004030047304502210083eaef5e957e361910840f1357821789a9d8e8498bd659c35abc8425ebecfc22022004f1bd83437807be0409b3180692ee4cba6165e2825010a91e8336920a75d32c
 . . . . [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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