ss.ssu.ac.kr

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:b8:a5:2d:fb:08:6a:17:35:c3:0e:0e:cc:21:d1:c7:0a:e6 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=ss.ssu.ac.kr

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:b8:a5:2d:fb:08:6a:17:35:c3:0e:0e:cc:21:d1:c7:0a:e6
Serial Number (int): 411280660604708278336930794297997729925862
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 64:2e:e7:9d:b8:fb:0e:56:78:82:70:51:bc:40:9f:f4:c3:5d:4b:ee
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): f3:c7:f0:c0:a0:ce:cd:0f:9f:f9:ff:93:e1:81:23:02:08:c7:33:41
Fingerprint (sha256): 55:74:ea:fd:5f:94:38:69:57:28:5d:5c:e8:b3:4d:96:8f:67:26:13:7f:a7:d0:2b:f5:49:b3:07:d1:cd:9d:b8

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 ss.ssu.ac.kr

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for ss.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

ss.ssu.ac.kr

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tls.automattic.com
lleoffice.ssu.ac.kr
ss.ssu.ac.kr
anda.ssu.ac.kr
ssl-i.nurimedia.net
robotics.ssu.ac.kr
lleoffice.ssu.ac.kr
anda.ssu.ac.kr
oslab.ssu.ac.kr
tls.automattic.com
soc.ssu.ac.kr
ssl-i.nurimedia.net
anda.ssu.ac.kr
anda.ssu.ac.kr
*.ssu.ac.kr
lleoffice.ssu.ac.kr
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soc.ssu.ac.kr
bmil.ssu.ac.kr
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lle.ssu.ac.kr
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job.ssu.ac.kr
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oasis.ssu.ac.kr
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ssl-i.nurimedia.co.kr
anda.ssu.ac.kr
robotics.ssu.ac.kr
ssl-i.nurimedia.net
camp.ssu.ac.kr
robotics.ssu.ac.kr
anda.ssu.ac.kr
robotics.ssu.ac.kr
educamp.ssu.ac.kr
*.ssu.ac.kr
soc.ssu.ac.kr
robotics.ssu.ac.kr
ssl-i.nurimedia.net
robotics.ssu.ac.kr
sw.ssu.ac.kr
lleoffice.ssu.ac.kr
*.ssu.ac.kr
tls.automattic.com
lleoffice.ssu.ac.kr
oasis.ssu.ac.kr
*.openlink.ssu.ac.kr
bksit.ssu.ac.kr
educamp.ssu.ac.kr
openlink.ssu.ac.kr

Certificate

The complete raw certificate details for ss.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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxjNnI5oCj2o4+eQAaV0A
shdLRePVM00KXV6lL4OiuBemOWpq98coVZklKbow8Jr2j6pc5N99CFUMZQ50T8gm
yHXk214Iq7s83fObWVNN2Mqe/q4zTxD/7kM1IR5bKmGcslYJ4GuIghieaiyKHM6V
FCZJA1mkTKGzilEhNHDJkd7K5sS0sZ+XybvsahBCwVgc6qcUwVB+6OiTv1qnfJww
qp+5bbECh0x12HQZZR/ZVOdSP5hRmPnku47l2AvpKHIAZ9SID76QsTYowzrOLbzQ
YT4W+13qxNny1Vt/DmSqiIVVwnty+kK6Ic5OvTr9gpB/9GAi0ZRf6+F+EPkdSHXu
JQIDAQAB
-----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 411280660604708278336930794297997729925862
 . . . . . . . . [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 2019-12-30 07:37:40 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-29 07:37:40 +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 'ss.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 25020532091575084676050776084435566512885486812083544613975389458652217775737378688062102357577881427861968228096146412364080581080677069203962774859295541131589748485121069107750408045868044295912459264119613358069875908427317417537169005901591872965627653526030463639632693954343075632136112953322541577905479508855437604654371054051457309155643071973575245620590126463448919064175098534536176104167152581303809913146498109751987095707990444996212046900454582367709263390797623763818605124739565888303219262663060072922235001238804446115734799054276668159010148802744095047308230913242745971085666777064439301926437
 . . . . . . . . . . . . . . . . . . . . [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)
							642ee79db8fb0e5678827051bc409ff4c35d4bee
 . . . . . . . . . . . . . . . . [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 (16 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ss.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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef0075006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016f55f4224e0000040300463044022023a0b90ed89cb4d5f23abc621af28df1dc63b203ee803ac533597a89f026cbb1022041366de1faff6b99059d05c3bf3992090515afba4b775005b91d8facfa7fa4bc00760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016f55f4224e000004030047304502205223d669fbf4b89867505790121557a97c123ba8c760f861afb92e16b9691140022100c38e2aecfa2dd1d86019a27ef2666945f8fc72f69e266c93755e146ef6ae5c53
 . . . . [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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