sslab.ajou.ac.kr
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:ee:af:e7:5d:56:b4:1d:49:19:5d:0f:c9:5a:5f:f9:43:56 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=sslab.ajou.ac.kr
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:ee:af:e7:5d:56:b4:1d:49:19:5d:0f:c9:5a:5f:f9:43:56Serial Number (int): 342557877335434233888744532904402619024214
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 4d:6c:23:13:95:e6:a0:0a:bd:14:b3:09:4c:51:7f:f1:f9:f6:13:a6
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 85:4a:14:f1:15:a8:d1:42:ef:b6:09:c4:a8:62:39:ae:88:55:e6:cc
Fingerprint (sha256): 52:c9:27:74:bb:4c:d8:58:b3:de:fc:48:2a:f6:b1:61:a0:ea:98:26:c5:92:7c:b5:ea:97:db:34:ec:13:bb:c1
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate sslab.ajou.ac.kr
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for sslab.ajou.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
sslab.ajou.ac.kr
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Certificate
The complete raw certificate details for sslab.ajou.ac.kr in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFWTCCBEGgAwIBAgISA+6v511WtB1JGV0PyVpf+UNWMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTEwMjUyMzE2NDdaFw0y MDAxMjMyMzE2NDdaMBsxGTAXBgNVBAMTEHNzbGFiLmFqb3UuYWMua3IwggEiMA0G CSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDG3UXjHD1jjuIloNc7eM3L8yn+/JMu pOUDArWoCcoehsVaMrmTMw2jn4V3m+m69oqVHD3FsdWswazXqzC/gg3yUERGpIIa FBOow/ZegyW6thApPMxznZbWHOz1XBakgaOYVGK2kbAFVn4sEtIvWTRfaMSaPPE+ Ak/pXMQN1s63fMlUD2ipiZ8JPgQiOWDQ22fDw67ZXrt3GInA1O8QMMAOUF3Zi+Gq L6m1iygD2MOBFLU7XLZgyoV7rdF4EVfG2o65BkDiP3uC9su1AYAzZ8ZsCoLyQxu9 MYMex9yvkl/PrSUmlz9Ht9Jyq/lhsvycXfqF9IBP1r1MBO7lVfIfm4mDAgMBAAGj ggJmMIICYjAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsG AQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFE1sIxOV5qAKvRSzCUxRf/H5 9hOmMB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsGAQUFBwEB BGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNlbmNyeXB0 Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNlbmNyeXB0 Lm9yZy8wGwYDVR0RBBQwEoIQc3NsYWIuYWpvdS5hYy5rcjBMBgNVHSAERTBDMAgG BmeBDAECATA3BgsrBgEEAYLfEwEBATAoMCYGCCsGAQUFBwIBFhpodHRwOi8vY3Bz LmxldHNlbmNyeXB0Lm9yZzCCAQUGCisGAQQB1nkCBAIEgfYEgfMA8QB3APCVpFny ANGCQBAtL5OIjq1L/h1H45nh0DSmsKiqjrJzAAABbgVsM1IAAAQDAEgwRgIhAIGZ geFonwIbDEwb9YzlP5UXaBgDdylxqk6rNAZWxwW1AiEAgnt4FQ0l3OP6HkyOMBaM o4IgJ1svZOOMFxMr7giH1sAAdgAHt1wb5X1o//Gwxh0jFce65ld8V5S3au68YToa adOiHAAAAW4FbDN1AAAEAwBHMEUCIQDAW2A/xCONRPgevcoA7yOs+/aXRTQQVozP o1vKYRIkIgIgQpbqZ1jS3jPcJDPh7jGyg+kRv9sny6+SNojCws5Y2jQwDQYJKoZI hvcNAQELBQADggEBAHFezCsZvV2uKsyGXQMB3cHSAbh1qRcTfb7wtLg4kBqmcEKV qBGjfueHdLVMgzY61B/WTU0ylhKdg/rXmDQXK2b3nw5iklsbmCEEq9yudYizzbR0 nSdKT9oIBOAej2NdWxj/syg96btdO5Gh1gjwU/ZKHEcWpFwpAFoZWkY8aCWFUWDn aP1MPFzu+J95+RUx+TNqVlVRKcNQdTnEjajkk8CjX6XmTP+2irbwyUpBRZU0d2Lv uLcRORRhziPFe+dkvXoVQElKUOF9z4DCnpwLjRylH4+8n0EYpYGoWlIEZG3METNu YiKQl7wrl7xM2pXtuZlU5K/0T1V6V9KLSTWHXKk= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxt1F4xw9Y47iJaDXO3jN y/Mp/vyTLqTlAwK1qAnKHobFWjK5kzMNo5+Fd5vpuvaKlRw9xbHVrMGs16swv4IN 8lBERqSCGhQTqMP2XoMlurYQKTzMc52W1hzs9VwWpIGjmFRitpGwBVZ+LBLSL1k0 X2jEmjzxPgJP6VzEDdbOt3zJVA9oqYmfCT4EIjlg0Ntnw8Ou2V67dxiJwNTvEDDA DlBd2Yvhqi+ptYsoA9jDgRS1O1y2YMqFe63ReBFXxtqOuQZA4j97gvbLtQGAM2fG bAqC8kMbvTGDHsfcr5Jfz60lJpc/R7fScqv5YbL8nF36hfSAT9a9TATu5VXyH5uJ gwIDAQAB -----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 342557877335434233888744532904402619024214 . . . . . . . . [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 2019-10-25 23:16:47 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-01-23 23:16:47 +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 'sslab.ajou.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 25104298164668021346951381473653007555626058543506604952964263089008627536595216856541014002775340182720510709528400834927882223248155834715639316375055076576451096481224222292308379863997565916041592642667776577239653010907955410003162909994943395179874786742957877209572355550184145908689678349743179592933592299772909361740212655264314710351604913403176775894862255110965216916180136052288895613532247321877103259286594663969057789274347662487223841473286035385790872923788444860695861821879237852914214577689015639563189006904700059141778576675581660075962188259596760522507722789783803325703606137401194980280707 . . . . . . . . . . . . . . . . . . . . [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) 4d6c231395e6a00abd14b3094c517ff1f9f613a6 . . . . . . . . . . . . . . . . [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 (20 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'sslab.ajou.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 (246 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes) 00f1007700f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016e056c33520000040300483046022100819981e1689f021b0c4c1bf58ce53f9517681803772971aa4eab340656c705b5022100827b78150d25dce3fa1e4c8e30168ca38220275b2f64e38c17132bee0887d6c000760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016e056c33750000040300473045022100c05b603fc4238d44f81ebdca00ef23acfbf697453410568ccfa35bca6112242202204296ea6758d2de33dc2433e1ee31b283e911bfdb27cbaf923688c2c2ce58da34 . . . . [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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