www.masojicin.cz

Issued by R3

About this certificate

This digital certificate with serial number 03:2f:42:ad:de:8e:7d:45:b7:d9:59:6b:22:b9:d9:4a:9c:0c 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:
  • 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=www.masojicin.cz

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:2f:42:ad:de:8e:7d:45:b7:d9:59:6b:22:b9:d9:4a:9c:0c
Serial Number (int): 277418760869627279693449736807324769229836
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: eb:ca:cf:75:7d:11:3c:79:20:75:54:5b:48:ef:6d:a2:2e:d8:db:df
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): c3:22:99:72:4a:dd:80:e1:94:c3:90:30:b2:48:d1:55:c0:8c:5f:c4
Fingerprint (sha256): 4b:af:05:04:b6:c0:a0:12:b5:0f:fe:31:ff:0a:72:51:c3:e8:4d:38:1b:88:7e:01:70:c5:d8:df:09:d0:ad:ad

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

Revocation information

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

Check the revocation status for certificate www.masojicin.cz

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.masojicin.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

masojicin.cz
www.masojicin.cz

Other certificates including the domain name masojicin.cz

(limited to 100 certificates)
mail.masojicin.cz
mail.masojicin.cz
mail.masojicin.cz
www.masojicin.cz
www.masojicin.cz
mail.masojicin.cz
www.masojicin.cz
mail.masojicin.cz
www.masojicin.cz
www.masojicin.cz

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA099hhizEe94UZ8wDsy7b
/cDwkZ1J71gzsmujexi7mLz7uW/yixFlX0P3tpNBmHQ7yt6gzc1ERBgVahhHvzMD
B5kJlNuDd8I3DfbL7CBT3kIr2P/LVo+MsKWXNQb6DJj5ABkdXUSj67GxF/AJ/26j
i9Hc8xlRriwkYrDqseOFzDDTqC/joZoTAF7ZAlUUmxAw0LO5Jp369ZsFTMcK/CQe
7KR67YZ8d8V2HENHbQwNoN3yZELGW6fW7zXhDY/iHwHuf0yTDQ0Z2lYnFLdRa9LT
dM+W8CMdmBZSIEpwO+J/0cGntpoZqFGo1wpi0nZSyI+KMrA+GrIQVUPkfT6ZK/1a
NQIDAQAB
-----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 277418760869627279693449736807324769229836
 . . . . . . . . [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 2023-10-19 05:38:36 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-01-17 05:38:35 +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 'www.masojicin.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 26746435601524586955750522724456228602024022590498321796908010744184101739848293183468307834492361223996797249870810302964827177604725211313517572264261593531789711272594967729492042465673699537929880073573465118867810873892901339128100278349277481876081921856491169257269437155738894595756839596552130042462319676997451846032910313033184766545889197969576249939213551897310406247823402818475071385573847628337680842524512642027189346197990888818832229048050318792333413958412753306230761916691261068036428229304894010892497465324797793576790371654527933370834353106217731819904851271085490246360995761814886984538677
 . . . . . . . . . . . . . . . . . . . . [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)
							ebcacf757d113c792075545b48ef6da22ed8dbdf
 . . . . . . . . . . . . . . . . [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 'masojicin.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.masojicin.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)
							00f0007600dab6bf6b3fb5b6229f9bc2bb5c6be87091716cbb51848534bda43d3048d7fbab0000018b46a84c2c000004030047304502204fb17f7a5194844f215de5dd67403ff7fb6098b0eb70512a4980aa6033d66f1e022100862c566bc4c7ece3387da26ff21b0a02d10711874182c68b9ad5a8f67046c9370076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018b46a84e130000040300473045022100914f297c638c54340329c5673405446f6ba2c5eb1e668e8e5ec52b24b8b489b80220660ba263384d7b3e5854561c6e9fba32ac2277a8d7dd28d289dded473a0c11c8
 . . . . [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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