icas.ajou.ac.kr
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:a0:04:25:c9:98:3b:28:b6:bd:bf:91:f2:a0:b0:07:b6:48 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=icas.ajou.ac.kr
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:a0:04:25:c9:98:3b:28:b6:bd:bf:91:f2:a0:b0:07:b6:48Serial Number (int): 315787549618423119417862623618435505436232
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 6a:95:a0:c5:f7:f6:dd:2f:cd:de:af:7b:b1:08:fe:a7:23:0a:bd:38
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 49:98:48:89:c4:d7:14:9d:48:52:98:d3:24:20:bd:60:71:b4:f4:5c
Fingerprint (sha256): 4b:7d:1a:ae:8b:0f:4f:b2:62:e3:f0:85:3f:de:b4:8d:80:fb:0f:23:3f:fc:ac:94:ce:d4:8b:4c:a5:ee:83:c2
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate icas.ajou.ac.kr
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for icas.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
icas.ajou.ac.kr
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Certificate
The complete raw certificate details for icas.ajou.ac.kr in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFVzCCBD+gAwIBAgISA6AEJcmYOyi2vb+R8qCwB7ZIMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA4MTgxNDM1MTZaFw0x OTExMTYxNDM1MTZaMBoxGDAWBgNVBAMTD2ljYXMuYWpvdS5hYy5rcjCCASIwDQYJ KoZIhvcNAQEBBQADggEPADCCAQoCggEBAL5UWw/l63J1GRoQDyBs1/KYBMeWQhow ytnNdD4qiNT2ruiXzPJp0SsTUly4TzA92ieZJWKqsxVMA1c5BwD584WXNtEBYCIF SP835JzfSFgkmHhUhTe7oKiEb0r05ACy2nX0SFAIOPrIogKkFpFSc194xmgCkHJl OWoizVjc52gkGvZtFSNXJxE55lH5G/h74GcQzB/CSHyN32mZwZDjl4Zd0gKo/TI2 BQljnwd+WZZBLxU78uZ0a4Kbe9qCcElnFfNk3ExkBkxXVDlDTkuzqYhOnI5mKOTe NL48Up86wr2KDgMu0JXC1IZzTbfvqDk9wg2mm72g08OEyd76ogMr3bECAwEAAaOC AmUwggJhMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYB BQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUapWgxff23S/N3q97sQj+pyMK vTgwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo7KEwbwYIKwYBBQUHAQEE YzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMubGV0c2VuY3J5cHQu b3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMubGV0c2VuY3J5cHQu b3JnLzAaBgNVHREEEzARgg9pY2FzLmFqb3UuYWMua3IwTAYDVR0gBEUwQzAIBgZn gQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYaaHR0cDovL2Nwcy5s ZXRzZW5jcnlwdC5vcmcwggEFBgorBgEEAdZ5AgQCBIH2BIHzAPEAdwDiaUuuJujp QAnohhu2O4PUPuf+dIj7pI8okwGd3fHb/gAAAWylXkxUAAAEAwBIMEYCIQD052oj QSUJp61mh8eqC+R1z/IEqzBR2pUfB9mw3RNrNwIhAKl4smmrmQpROFYbTXhmoRBo 5Z/pGvzaIzCMKoZMJnX+AHYAKTxRllTIOWW6qlD8WAfUt2+/WHopctykwwz05UVH 9HgAAAFspV5MRgAABAMARzBFAiEAmEVperYGVMw23b3Ah9lsMJ/Pny1W1hsk3DBv 50B9s+4CIFG+NE4QPq4mycq4F20KgvFx9NcgOJY0crHDq650Zsk2MA0GCSqGSIb3 DQEBCwUAA4IBAQBU5ezHMIIGWnyLb43WcQ0q9pr6eR2TDHua/ViCWWjdRI6zC0wM ftj9p3Vz6aC65kHgmIh7YJeqdg9gjkvNuDaBjg96OHLTzWRzXv3By59p0qaPq5W+ 1efmmFQG0Ch7KOAL8ZUWIjntl4xXFGAU8C+HmQPP5ZBs0EioDdi8BOJGwk+2w61E Uv9/bxsNPKoxu1Czr17CscIo+EHR4id3S4osAltJryLpGtYJJecTyMLyToqI/ays Apjy01cAfRFImzoBM3buhClw2+65RFHSs44v5I/C/HM9MLOaBsTAv+M5YuJUZymz BKdVaciBpQpxdiTVzudATM5mOAasETA4krn3 -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvlRbD+XrcnUZGhAPIGzX 8pgEx5ZCGjDK2c10PiqI1Pau6JfM8mnRKxNSXLhPMD3aJ5klYqqzFUwDVzkHAPnz hZc20QFgIgVI/zfknN9IWCSYeFSFN7ugqIRvSvTkALLadfRIUAg4+siiAqQWkVJz X3jGaAKQcmU5aiLNWNznaCQa9m0VI1cnETnmUfkb+HvgZxDMH8JIfI3faZnBkOOX hl3SAqj9MjYFCWOfB35ZlkEvFTvy5nRrgpt72oJwSWcV82TcTGQGTFdUOUNOS7Op iE6cjmYo5N40vjxSnzrCvYoOAy7QlcLUhnNNt++oOT3CDaabvaDTw4TJ3vqiAyvd sQIDAQAB -----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 315787549618423119417862623618435505436232 . . . . . . . . [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 2019-08-18 14:35:16 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-11-16 14:35:16 +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 'icas.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 24026875295165504578587555333174851633608503032470143300230097707893571777776561237798950631548008673903867642290109528338480756877160040176730420878400871104273601919807888012324443754943185098769881409834852633785057651806238191705960246799771412179591671419455699266573763093956700008761930206004526372242832041245144305361190804611620668919442246781405604275430478887339060861242681119671238720844211296816822325196961584147949265226963338884746386404236110423755779675770855035212937760335694427598010312494312569543271702565302586791248992894119799268519088250082480015853052403786752137592828940452095100444081 . . . . . . . . . . . . . . . . . . . . [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) 6a95a0c5f7f6dd2fcddeaf7bb108fea7230abd38 . . . . . . . . . . . . . . . . [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 (19 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'icas.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) 00f1007700e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016ca55e4c540000040300483046022100f4e76a23412509a7ad6687c7aa0be475cff204ab3051da951f07d9b0dd136b37022100a978b269ab990a5138561b4d7866a11068e59fe91afcda23308c2a864c2675fe007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016ca55e4c4600000403004730450221009845697ab60654cc36ddbdc087d96c309fcf9f2d56d61b24dc306fe7407db3ee022051be344e103eae26c9cab8176d0a82f171f4d72038963472b1c3abae7466c936 . . . . [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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