robotics.ssu.ac.kr

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:33:ec:5c:5d:ad:5c:c5:5f:11:a9:8b:9b:09:3e:06:aa:ca 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=robotics.ssu.ac.kr

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:33:ec:5c:5d:ad:5c:c5:5f:11:a9:8b:9b:09:3e:06:aa:ca
Serial Number (int): 279005435906564103409464661968301712648906
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 53:5a:e6:31:61:7e:87:e9:ff:43:26:65:f8:ee:6e:1d:fa:53:f9:3b
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): c5:f2:a1:d1:04:a2:33:1d:b5:8a:8c:41:07:31:8f:74:36:d8:be:d1
Fingerprint (sha256): 97:e8:73:50:de:fa:6a:95:67:b3:c9:30:77:57:b6:da:c6:12:b1:73:9c:08:0c:8d:15:b9:59:ba:9f:35:ff:60

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 robotics.ssu.ac.kr

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for robotics.ssu.ac.kr

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

robotics.ssu.ac.kr

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openlink.ssu.ac.kr

Certificate

The complete raw certificate details for robotics.ssu.ac.kr in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAueb3+7t850JAtCnm+KXn
Nhjy6qwF5Kg/Aq+c9AISun9rcgCisrWezJf5TLgN3gc1LJanKgW0CmsyPfUiB9qV
TeFQXikkzLXZjCQIOn7iCg+A5vjxscd61Tt4OdJvWrN5xYhRX9RFUNKFSx5LTWVv
IW7dqrGNy7AcCIU4Epl2JpIGvGSOxScCKmnS+sX+uUw8Jx6n2yEibDcWAhx+E2DO
lZ6ZUhhDboJu3ZBdl36pKpigxGFo+9722E+58GwDgsAvFX0gGA3a7X5nNlDbeB9b
YcwdsgpiLkkkaosT2YYxqENbrDRGfqy83edOVtbm91MfqUVqHVM/GyT76qnb1pQj
+QIDAQAB
-----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 279005435906564103409464661968301712648906
 . . . . . . . . [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 2020-01-01 02:37:54 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-31 02:37:54 +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 'robotics.ssu.ac.kr'
 . . . . . . . . [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 23467981322156950581732833243468771144005920621664621706145043115846131966833696259519234347946348927273806587500232387210167607259361386304889484227143562152509585055040610462738970641974356933069438593698256525577377561946320651191467909113782873293623587307716221287652606863860521627439267899629721386310740796599061362713462358538731127557353748226260196601643408470230247434018030317627833639894592925882488524741710779125780154166323248712538671459951500998769463706949785842292462279768004923047005839571834750170462655462114251921816737449547121362083385248163811923084998081602249666190221616831598460937209
 . . . . . . . . . . . . . . . . . . . . [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)
							535ae631617e87e9ff432665f8ee6e1dfa53f93b
 . . . . . . . . . . . . . . . . [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 (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'robotics.ssu.ac.kr'
 . . . . . . . . . . . . . . . . [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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f00077005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016f5f2e67e40000040300483046022100eb0e5f3912161a4ef4925ff7d2db18c344e93dc3c1a5dbb5d94ceb41f15265a8022100a54a975454dfbd848706c78ea66be726d38b7a34586684a996f2127d72a4fdad00750007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016f5f2e68100000040300463044022017737fbf098940aa88d65afa06858e85f86a423a959722bb176ea92635c903c502200c15d55e7672ae2c093c38b5fd4e7c36d173b7ed4090c23211801dd43a292900
 . . . . [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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