oltkorea.org

Issued by R3

About this certificate

This digital certificate with serial number 04:06:fb:c2:c3:fe:93:e3:d2:3e:c2:30:e2:f9:b5:8d:32:b8 was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com. 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:
  • DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Certificate Subject

CN=oltkorea.org

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate will expire on

Certificate Details

Serial Number (hex): 04:06:fb:c2:c3:fe:93:e3:d2:3e:c2:30:e2:f9:b5:8d:32:b8
Serial Number (int): 350825485436338782714092953276338706133688
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 58:98:7a:9f:a1:1e:68:2e:dd:12:16:89:8a:74:4a:6a:f6:62:46:2e
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): c2:e9:75:81:16:c8:7c:11:fc:19:64:84:dc:91:c2:98:41:89:d7:1f
Fingerprint (sha256): d7:aa:29:7a:ef:55:41:0d:45:45:81:0e:01:8d:9f:80:d7:23:d8:3f:0d:21:b2:5a:21:53:78:9e:3e:57:72:7e

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate oltkorea.org

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for oltkorea.org

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

oltkorea.org
www.oltkorea.org

Other certificates including the domain name oltkorea.org

(limited to 100 certificates)
oltkorea.org
connect.oltkorea.org

Certificate

The complete raw certificate details for oltkorea.org in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAoAfjIRQg+2/UgdDwflZS
I+LOq35l1aZAl8yxWq6gnq70xN+Ra0EGkYUHWsvnAR5ihtODGKtQfOZ1qNgDl26t
HcWBBb3gO/GXwRWCSs5U8mfthz6Ct6ms2h29NFHvf0RqLdeaxnr78v8tQ749KJ45
dWBnC7HldJ99k9AEtB1qiLxmK07uvtiAomtH5Hm/+I7eqSRE+EAvMq+vg+AJEo0I
Czm+VhvyTRDtXCNjC+GcOtavLWIwKfIVd3nVuiy8iA4O8uuscdJesIXmSkGLTnMc
POd7L6KesHjlNjVb3htLizUJy927K49JdOKY9fN1DkB6/pw9fFKvEsFmHWtetU0G
hwIDAQAB
-----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 350825485436338782714092953276338706133688
 . . . . . . . . [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 'R3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-05-03 05:37:08 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-08-01 05:37:07 +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 'oltkorea.org'
 . . . . . . . . [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 20202018129429700851362107941051356375630795908872324553047894586117576389451431379910354821365712288914814538339821101992701795982095611895730083414968394066078454508548311493634979997550137758199200363758414618543325017723085022450622296564226963458161488585196297897513982749066853717701801629520994222475862051534253916648637333324020049885636988248000380750752583164640223810666145171340951910865785857222881733405570631549355276589684868110346319493902142761508089371082914815670004098407470349168520593860231855383367385663207514451666784351704163601530885129586262492044214994145274098467249832038526125672071
 . . . . . . . . . . . . . . . . . . . . [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)
							58987a9fa11e682edd1216898a744a6af662462e
 . . . . . . . . . . . . . . . . [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 142eb317b75856cbae500940e61faf9d8b14c2c6
 . . . . . . . . . . . . . . . . [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 (73 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://r3.o.lencr.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://r3.i.lencr.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 (34 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'oltkorea.org'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.oltkorea.org'
 . . . . . . . . . . . . . . . . [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 (12 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f000760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018f3d2bbff8000004030047304502206c60ac2b8c7962b5833118156a2fec806f5127efb13f7131a139f818d91b43ec02210081a299110ce0bd9b935e98ede3784ef2fb82149097780279f3713f7937a694300076001998107109f0d6522e3080d29e3f64bb836e28ccf90f528eeedfce4a3f16b4ca0000018f3d2bc00c0000040300473045022100dcb51e2e61037b26e438dc479944f83b3a623d11f52624e5ba39b9c859694f2f022056244f451a2213fb919a05137eba36c4569427b3bb39ff0dba76cdb777c07def
 . . . . [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)
		00764b7e7853824faeb4eafc5d240e0b34d085b5f7bf975dc55de4e19739b7218c239f7a1a25f760fae313ba71158b4db75a6ab6133157c9b188088f992d8547532904112194b1e3ecf532067625b9d5f535121649b07342fe1ef52582bd44bd24590f04ee6d34d6650d593ebc8d4bc84e8b614425028d6101ea9fc0d7ae2a853048f8af1aff5fdec904c8807be17687a877a27634d5be8b796fc8dbf9cd04588379191d2bc4196508314210ed1828e69a055f1fbb9f4b3d195c8c688bcfe5f019c8cf38b8aa3b776653b3306077eddb2b29c18a21f2fd108d99bf0b8ecc3193b8adf04d354e3b2e14de8a0d6ed2e8fd4eedeffae262c2f9e5efc4be86a10fb443