sejong.cz

Issued by R3

About this certificate

This digital certificate with serial number 03:72:fa:0b:08:86:f7:68:07:9a:a5:6c:a7:1e:ac:99:8f:aa was issued on by Let's Encrypt.

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=sejong.cz

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate will expire on

Certificate Details

Serial Number (hex): 03:72:fa:0b:08:86:f7:68:07:9a:a5:6c:a7:1e:ac:99:8f:aa
Serial Number (int): 300461411911431816793771450191374076972970
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: d2:97:c6:9e:eb:24:2a:57:fa:8c:6f:a0:cf:03:9a:59:24:ef:0f:0d
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): e0:c6:d0:dc:1b:df:6e:d7:04:62:8b:6c:1a:b6:92:f8:20:f7:8a:fd
Fingerprint (sha256): 1e:15:c4:1d:d5:d4:61:4b:23:a3:66:f7:fa:a9:20:40:32:56:80:4c:87:e2:4d:4f:9b:4d:b4:4f:72:1c:0c:b2

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

Revocation information

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

Check the revocation status for certificate sejong.cz

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for sejong.cz

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

sejong.cz

Other certificates including the domain name sejong.cz

(limited to 100 certificates)
sejong.cz
www.ayanengenharia.com
sejong.cz
www.andrijakostic.com
chiin.org
sejong.cz
sejong.cz
chiin.org

Certificate

The complete raw certificate details for sejong.cz in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAur8BFHqMtAudXvejmmmp
C72czQGEobAYxlMZs4FonQN1u7S1LfhZMm+hib1kMcT1dyADBqJh09u2Xgt9XtPK
AstiY32LoU7+j3E0jFrN/VdUxlFrpzMVyCO9Kdd/KbEfddgqrkLv3p/QOXFPKcN6
7UTTzAKr8R6iMLh7e4NbgC3/hKrmt2HXBF8Xr8KMDMtGPe9Vnj5kLYg2PcZpkjAH
evxuhVL1GV13+Ufnl3BaNGWbCkuSsaTYFRndkapQ6NloqG2UPN+RwjpaPwbpd0c5
AVccQ4d/e38NPa8tMqxUX/IKHhTB4HSLQN206XJb1XLgTDAn5hdLnzpf+mqs6boC
pwIDAQAB
-----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 300461411911431816793771450191374076972970
 . . . . . . . . [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 2024-05-13 03:33:46 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-08-11 03:33:45 +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 'sejong.cz'
 . . . . . . . . [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 23574512414366123983257404422654626818017123983262569393238769209196822311766046743112770969479013628872723556176519359131454980450127852373544559515743764636197872744354955181403351907046115316107941523690495508586619619318657694030816498453258584445169319900354522739103114156074785779251887263323831146544327476207056099706593280305324024452150976059768359562287562993025588305853449586255622901233241522443368589909699904121921468946006659527637580017911977593323193009309207127850636877838345068990998078997356821217719247110551024762893626006332884858066253318843335748087462636266291963513466694276052747420327
 . . . . . . . . . . . . . . . . . . . . [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)
							d297c69eeb242a57fa8c6fa0cf039a5924ef0f0d
 . . . . . . . . . . . . . . . . [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 (13 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'sejong.cz'
 . . . . . . . . . . . . . . . . [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)
							00f000770048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018f703a64710000040300483046022100e314031cd7054ee7cc1cb7b3055396b3f06cb08b7939c98ffe1899f2b7e7a8a6022100b63764cd63f6711b3205566906aa5e20793425ad719e5a0a1198d94f85079e7500750076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018f703a64c500000403004630440220594311aad5d93518338be222e7c5717bb25a26edd650f99aa9e9ba5184f98fa902206b21bf4e05a279ceba184c9ee1f06b2541b39379c62a42d8f43fd53ca92d3099
 . . . . [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)
		00867c212acf690d4867c13340d7945bc6ba8c7197864983b1de7241040abdf1cd3dfef76e65169c3942760384790afcbf1b31c9320d07f2a7757082a3e784110e33ed8d50e411e654d4a78750b848b10bfc928f3273bed7c3e0725462b2f9715acc6a1dd888a72663e84fd9de31e6941e0aa6d7dbf621df170a7902bd50122a100fc1fda51eac5f7f2f9e3212fae758948484a4e7fd9e85bd5d9f987c09b7c90eacc9335e323ff6fcc60ae1106b8a909283f3847d9b4625eedd9ea32ee0d14f7642b6eca55037d4a7dafbe78241b00db22bcb6b4a9abd02576b6825b7912e78f5f7d15356e16e8d5d4c2b76dc23e1dc947e35d8e18a72834fc057acf718981f38