robotics.ssu.ac.kr

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:b7:11:64:05:50:4b:59:b5:cd:c4:32:ea:6a:69:90:77:8b 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:b7:11:64:05:50:4b:59:b5:cd:c4:32:ea:6a:69:90:77:8b
Serial Number (int): 323631647155200296654349568701079206524811
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 4e:db:9a:7a:24:df:ef:9b:68:72:8d:50:da:99:55:86:76:66:a0:83
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 38:c5:6e:74:f8:02:38:35:83:d8:f7:7c:3e:48:72:e8:c8:89:37:46
Fingerprint (sha256): c0:90:f6:7f:ff:8f:32:3a:2a:9b:a7:df:ab:36:e8:dc:26:96:40:34:e3:5b:cc:b8:28:82:e3:06:87:9f:ae:f1

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

4096

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-----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-----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 323631647155200296654349568701079206524811
 . . . . . . . . [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 2020-01-10 01:22:29 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-04-09 01:22:29 +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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 909374581876986738610726917315255734925428112673031218884439407367495429111485537973893114377954965502853855218600999963106812093745968062945997149009542636371244558212232076354882410626308895577206382897891892004274125536295124858748637699984464312274710643780019788680299388133471790952054450711130626098090286499521475548675476262673456297296715010273862338490784953366615289720421908373291531314689393390481298136522753276870793483228432117955954886579854061431259920224476880200956541969053245768018847581350008756225603147585901772825542229183437040828430493513608316621314526373470241815028314713633757049501143070486571788025199940616632509803399519086465441393483595352135702890774297935357789113097760649776661957320097798357092169978786373229941724454644635404232983020168649747245296721428018897504880435025792200556275471278291097746018894942211765168671905769217477863444116496648441529312100875771531805106909822188901589763180685060605756998455661323815940953060852363660458577255497776006462906909374529258170583450965818068289838809987800033169141569828404380706983320928438009891607159330875708760812907998359994709269781903098192297949809878917691339600732808465021417422536337453732368100186678110647640387949503
 . . . . . . . . . . . . . . . . . . . . [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)
							4edb9a7a24dfef9b68728d50da9955867666a083
 . . . . . . . . . . . . . . . . [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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007500b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016f8d429862000004030046304402206877e0abf14d061b15548b24173dd825c3d35d6ed289098204dfd0201718e1210220380bdcfcee8bc5f61dbe73132ceaee5f74a114375b3dc9ce7148903a42a2475d0076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016f8d4298990000040300473045022065a748ccb356c51f008c08626def3b2061ed3257a8fe1d235c77a1e90879f942022100ae94d6b8c431543756b45e6d50f0e33e544da636a6aaa7873b05672ca37ef164
 . . . . [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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