artedu.cz
Issued by R3
About this certificate
This digital certificate with serial number 04:c3:7b:af:b3:4e:73:91:77:19:ec:65:25:b4:68:65:45:6f was issued on by Let's Encrypt.
With 2 subject alternative names this certificate can be used to secure multiple fqdn's. 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=artedu.cz
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:c3:7b:af:b3:4e:73:91:77:19:ec:65:25:b4:68:65:45:6fSerial Number (int): 414968612608822657571630544713538530002287
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: 69:f9:ef:1c:e8:5d:60:6e:f4:82:25:85:80:45:de:6a:04:da:64:e8
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): 00:99:4d:7f:73:8c:e4:72:09:95:0f:b3:fe:7a:ed:ee:3e:5b:e2:0c
Fingerprint (sha256): bc:95:d5:44:de:97:ec:6b:a5:56:08:8c:05:f2:fa:2f:76:2a:05:84:85:7a:4b:0b:e4:78:50:b4:a9:6f:ea:97
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate artedu.cz
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for artedu.cz
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
artedu.cz
www.artedu.cz
www.artedu.cz
Other certificates including the domain name artedu.cz
(limited to 100 certificates)
Certificate
The complete raw certificate details for artedu.cz in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGJjCCBQ6gAwIBAgISBMN7r7NOc5F3GexlJbRoZUVvMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yMzA1MjcxNDI1MjhaFw0yMzA4MjUxNDI1MjdaMBQxEjAQBgNVBAMT CWFydGVkdS5jejCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAKayG5G6 zd/xl53wEnFzgE2Z3JCpgxND7o9tN4F1w0Gt9/OlufRr8cChcBAvznl9QiCvDIAS 4ISq8EjKUSkOx/8cZDiniBVNQ5vFjvUCh3u7aIP5CHZyFZABd5OexZe1tDR8I5jw LKK0fb4kOs+n/tYEcqCEnSo6Nw49i0VFrAhrAtFVOOpvq9dUr6ieM+2VccUTKCM7 Ycba2+bE4bSiQ/9iEHKRzgEYpEtHt7cJRQj2hw8VlRzZUPZnPoXh4MTDmVizYjYe a/9AVF6Cf32EjOV+HB7/MNwZ4cop1+8GMpP9d87nSY88uuXUONrVoPDLhequd9fc 6ygK3xCvKvjjLzwA6Q/EGZpmYXhcL4tRpUaA1xMDL+IN414YHw5Bkn0YK1jQdeV6 ouMUgxPc91HFQOaM1Fui5OzhEl9IIZW2ZBUlQrqYDVCKEr3wZ+DxqSqGNVD6I6/Z 0LXg3mg+3tdn6Et9xxm0DWULOWMBmrxg6bcxbYlVYiezYYKWDaCnb2Z/GtytuYa4 0VhiDomc/5STawkANEAVzBMujZ0rRt0yxKGs3aPcZ9n8+yFGvp0diey8fmT0UoUm c3Ay7VUzxP4fC7j9pIprZvP6AsSZuh211YiSsLRJPMBD2TBmmB7r/NAnXQx9fGjk tQGatqsF0GimJXXFkD9A5Dwz4UXKrhvvTPUxAgMBAAGjggJSMIICTjAOBgNVHQ8B Af8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB /wQCMAAwHQYDVR0OBBYEFGn57xzoXWBu9IIlhYBF3moE2mToMB8GA1UdIwQYMBaA FBQusxe3WFbLrlAJQOYfr52LFMLGMFUGCCsGAQUFBwEBBEkwRzAhBggrBgEFBQcw AYYVaHR0cDovL3IzLm8ubGVuY3Iub3JnMCIGCCsGAQUFBzAChhZodHRwOi8vcjMu aS5sZW5jci5vcmcvMCMGA1UdEQQcMBqCCWFydGVkdS5jeoINd3d3LmFydGVkdS5j ejBMBgNVHSAERTBDMAgGBmeBDAECATA3BgsrBgEEAYLfEwEBATAoMCYGCCsGAQUF BwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCCAQMGCisGAQQB1nkCBAIE gfQEgfEA7wB2ALc++yTfnE26dfI5xbpY9Gxd/ELPep81xJ4dCYEl7bSZAAABiF3Q jf0AAAQDAEcwRQIhALzmoVOkQg2OmMyGRTVu3djeyEsMJZWIxe5NaMVrDGGQAiB9 +xNAj5+xHrRCJk02+ynfZU7WiEfBspjJb4uf2uPTuwB1AHoyjFTYty22IOo44FIe 6YQWcDIThU070ivBOlejUutSAAABiF3QjgoAAAQDAEYwRAIgNP0J8E9RGywzs3BY ffqIxvYaPaX6a3z700QKS7NBX5MCIG+BN/jJxxxxHUXRzCtCRNdMMS9+JB4Urp/w /zP6tfuZMA0GCSqGSIb3DQEBCwUAA4IBAQBW6J3cTM/5aRvUuuFhI356ws3VBdLN ywZ/fJSHPQFeaLdGEGsfIvCnpMfxajXnliRkwtzqvVt+inLI44/LL1Qdac7uRYUe n5YiwZuR+TIhxLQXeJMy+aMMsThG7tq3tVVWUAs8aQ2OlRCasOu0xGvTOpzo94rB 8ZAYMzp5EroU/s3ejPsPHd6dhXdeWMRoglgBS3cO8mC5PHh42fL9/dRCpMGvNCH5 4pehKQI8hKqqLUXBd+dvtPHaXVr//fqhRpEi8V4K06UQJC5dx4Jw+OZA+YDbK7G+ VmoCVanIeyFRBgIusOkT+xFuEjVL+jCtG3TOoX7K8voQ6vI81UdywR9B -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAprIbkbrN3/GXnfAScXOA TZnckKmDE0Puj203gXXDQa3386W59GvxwKFwEC/OeX1CIK8MgBLghKrwSMpRKQ7H /xxkOKeIFU1Dm8WO9QKHe7tog/kIdnIVkAF3k57Fl7W0NHwjmPAsorR9viQ6z6f+ 1gRyoISdKjo3Dj2LRUWsCGsC0VU46m+r11SvqJ4z7ZVxxRMoIzthxtrb5sThtKJD /2IQcpHOARikS0e3twlFCPaHDxWVHNlQ9mc+heHgxMOZWLNiNh5r/0BUXoJ/fYSM 5X4cHv8w3BnhyinX7wYyk/13zudJjzy65dQ42tWg8MuF6q5319zrKArfEK8q+OMv PADpD8QZmmZheFwvi1GlRoDXEwMv4g3jXhgfDkGSfRgrWNB15Xqi4xSDE9z3UcVA 5ozUW6Lk7OESX0ghlbZkFSVCupgNUIoSvfBn4PGpKoY1UPojr9nQteDeaD7e12fo S33HGbQNZQs5YwGavGDptzFtiVViJ7NhgpYNoKdvZn8a3K25hrjRWGIOiZz/lJNr CQA0QBXMEy6NnStG3TLEoazdo9xn2fz7IUa+nR2J7Lx+ZPRShSZzcDLtVTPE/h8L uP2kimtm8/oCxJm6HbXViJKwtEk8wEPZMGaYHuv80CddDH18aOS1AZq2qwXQaKYl dcWQP0DkPDPhRcquG+9M9TECAwEAAQ== -----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 414968612608822657571630544713538530002287 . . . . . . . . [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 2023-05-27 14:25:28 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-08-25 14:25:27 +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 'artedu.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 (4208 bits) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 680059259005420621783068819062395687097155167726999060414628498038027369363674190681627844304508674025510173123205698968346146063394190423825602852214377377718598790624516130379560348711693609637094062800292368140148043509465864117358987490591977607920281133129893577196116547385947948667289797624034904717816455094484704249485334587814380750839647483913753753355816111692179364986351506188048302851638850122216288623605661584980580172891371562931741412997745297078065125748755110356112020222155929404576394263564253955602207036634694350355737610390457937674983917577590338832393476456546965378585576525458134390193709508876320593939225526151996153582884526760332824396306618928586143629287561836130065621481209827850752260962163144734861705483973940939568693262578437968849496257789821309621551506708556159077372272947471104002411729075551514885024586017638339534321341257713579044071014648670821989724602675397998018345755254329524222625231781033136021157238932294178369678589994558389396926017256858917581832259433123087045210777632055179905339690950712086263328069206102614583467791654602546180114665472699557401150783733287216545063256047642000512148706563757615735908652832245103061561988268215234027599142750162399316379759921 . . . . . . . . . . . . . . . . . . . . [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) 69f9ef1ce85d606ef48225858045de6a04da64e8 . . . . . . . . . . . . . . . . [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 (28 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'artedu.cz' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.artedu.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 (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) 00ef007600b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb499000001885dd08dfd0000040300473045022100bce6a153a4420d8e98cc8645356eddd8dec84b0c259588c5ee4d68c56b0c619002207dfb13408f9fb11eb442264d36fb29df654ed68847c1b298c96f8b9fdae3d3bb0075007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb52000001885dd08e0a0000040300463044022034fd09f04f511b2c33b370587dfa88c6f61a3da5fa6b7cfbd3440a4bb3415f9302206f8137f8c9c71c711d45d1cc2b4244d74c312f7e241e14ae9ff0ff33fab5fb99 . . . . [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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