www.emak.cz

Issued by R3

About this certificate

This digital certificate with serial number 03:f4:e5:7b:77:4d:8a:bc:02:60:a0:07:c2:57:6b:4d:9b:f4 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=www.emak.cz

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:f4:e5:7b:77:4d:8a:bc:02:60:a0:07:c2:57:6b:4d:9b:f4
Serial Number (int): 344670789607288318112412103198863805750260
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 66:7a:1f:08:32:30:67:76:c1:83:83:2b:30:f3:ed:66:89:71:95:3c
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): c4:b7:57:88:90:29:25:c1:ba:47:a4:9c:25:17:29:b0:27:9b:8e:81
Fingerprint (sha256): 5f:4a:e3:bf:df:dc:2f:0f:23:f5:1b:bd:c8:09:57:d4:38:a0:eb:f8:aa:2b:17:b0:9a:4a:58:dc:a2:ba:03:ab

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

Revocation information

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

Check the revocation status for certificate www.emak.cz

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.emak.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

emak.cz
www.emak.cz

Other certificates including the domain name emak.cz

(limited to 100 certificates)
www.emak.cz
www.emak.cz
www.emak.cz
www.emak.cz
www.emak.cz
www.emak.cz
www.emak.cz
www.emak.cz
www.emak.cz
www.emak.cz
www.emak.cz
www.emak.cz
www.emak.cz
www.emak.cz
www.emak.cz
emak.cz
www.emak.cz

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAs9oUs20AFASFPyt7Yi0S
WaGzCDDlfL+FKPtK+xEON9Jjc9U5E+yjRcoynT3HeALmXcS08xHwVJ1DEr3atrjL
H0d42hgnLY7ax+mVi7KxhZ77ffUubv3lFF6QOf+AHoJ34ZTkMtnraq+rqU3S0FkJ
0jmu06X8kNl9vVR4AHCpITs0uY/KZRmDASEgLH88USip/NbZ6qasPBzKThcY7sTY
vlzxfsVXgDK0xgMBE3J6jkMfmwBv3v+v/+1I4HrRqkaaE/0kbl/hfwTgycwOiMn5
+BwFOKzqZS6D+3Grs1ZBvS83D8P4lcU1dWnIA9CzwVe5T6Xlj81YW2cNldd9SUo0
gQIDAQAB
-----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 344670789607288318112412103198863805750260
 . . . . . . . . [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 2023-08-12 23:21:33 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-11-10 23:21:32 +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.emak.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 22704196270439936338385240181237166207025965255536560914157043349877105301414350819767931167480589443074708933284718727649271422556154993358206158110706763130105199453096728557256429400868672755355489118626514859352008880620857153154419549722642021539999952738776278401034636784109204052005494995831088464608596882080039715272736105750624370854626723724235567496469642662990003230883356182096881273161422943126297480398092720380629260847682898216539176988849317267923730550069427080424008046611545709631345338334790423287044550985595202807744443468759546651632540336751202393007571713183340472029428308920111903421569
 . . . . . . . . . . . . . . . . . . . . [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)
							667a1f0832306776c183832b30f3ed668971953c
 . . . . . . . . . . . . . . . . [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 (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'emak.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.emak.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)
							00f0007600b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb49900000189ec45072a0000040300473045022100c45a6000b0a4c3257506d98f7404a7e2936fd112c96c780e2ae88038a38806270220257fa4342751a533683ed9516cf53ef96b558c1d57c989e8547ddb7837ddb37e007600e83ed0da3ef5063532e75728bc896bc903d3cbd1116beceb69e1777d6d06bd6e00000189ec45074b000004030047304502207ff5983b89ee13a6165a7fe300b815a112eb0ef120e53ac209482e5772b51a1b0221008dfb04c8028113e24e5bfdebbbd029c87d6f6e10f85d983c6815cfd7028d9cc5
 . . . . [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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