DV SSL/TLS Certificate for projektyporsenna.cz

Certificate is witin its validity period

Issued by Let's Encrypt (R10)

About the projektyporsenna.cz DV SSL/TLS Certificate

This certificate with serial number 05:85:29:2e:5b:fe:b4:e6:44:45:b8:58:a0:55:54:b8:a6:ba for projektyporsenna.cz was issued on by Let's Encrypt.

With 2 subject alternative names, this certificate can be used to secure multiple FQDNs. This DV SSL/TLS Certificate is currently within its validity period but we haven't checked the revocation status of this certificate, you can do this simply on revocationcheck.com. We have found some issues with the compliance of this certificate, they are be shown below. We hope this DV SSL/TLS Certificate review for projektyporsenna.cz provides you with the detailed information you were looking for.


We have identified some issues with this certificate:
  • 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)

Let's Encrypt

Organization: Let's Encrypt
Country: US

This X.509 certificate will expire on

Certificate Details

Serial Number (hex): 05:85:29:2e:5b:fe:b4:e6:44:45:b8:58:a0:55:54:b8:a6:ba
Serial Number (int): 480873723518647935914646822318042911385274
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: 38:14:ef:f2:77:7a:6d:92:46:d5:a8:ae:b8:12:27:24:b2:74:4a:b4
Authority Key Identifier: bb:bc:c3:47:a5:e4:bc:a9:c6:c3:a4:72:0c:10:8d:a2:35:e1:c8:e8

Fingerprint (SHA-1): 65:0a:f1:79:dc:3f:db:69:f7:2a:d7:4a:29:b3:3e:3e:53:f1:d4:5d
Fingerprint (SHA-256): 0f:d0:bb:32:e4:c5:0f:19:0f:67:de:d7:4a:b6:51:17:5f:0f:a5:63:80:e2:9c:78:be:35:b1:8e:68:0a:01:e5

Issuing Certificate URL: http://r10.i.lencr.org/

Revocation Information

CRL Distribution Point: http://r10.c.lencr.org/59.crl

Check the revocation status for certificate projektyporsenna.cz
2
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for projektyporsenna.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
10
CA Certificate
This is not a CA certificate

Subject Alternative Names

X.509 Certificate

The complete raw X.509 certificate details for projektyporsenna.cz in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApT1nVQ3Ujph5loQW0TON
Tu+zI+BduPlJAnr+o70urIliw1E4GuVAQ9MnZWwdiiqfmmxrk3xlenvOYSzags0D
6+K/wcb/cVdLZqHg4FysQHlxz6W/DLI/IW3hZMwzs9MofFNw/RoUvYeUqLouMtIv
/8HxoyfIS2k7Eil3qii6KWEwINkG/U5IcppdfeevvGkR+5+nV3t6V1+fSZEGG72t
Qu56SuTJcnBHYuY3k1xJ8tu9oockEIRQFyXNnku/gq9NwXbky+A7dQwvYx9ZtYwN
m5oTxyGt+yezRrsiIIasSIPXXwZPkgKIDgtP5E2OiR+Z7kbcQs4sCnGHfoC9r31S
+wIDAQAB
-----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 480873723518647935914646822318042911385274
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'R10'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-07-03 16:26:17 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-10-01 16:26:16 +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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'projektyporsenna.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
 . . . . . . . . . . . . . . . . [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 20859599583582170853073289792691399030810747154316723704973078914778289228885055316875035454678300046198611620883039713532755091170158235580245269508452051878024712783308161967489388285479212274721968750713464590028413013104353855404810260221804830153026129464263618457950190993963114263621094518813058717703251687437774086063558362581067697416572926367460626112108560460571760127847675555454161564632725381094252809008101317914851826427197659989298877080121605065333823622141137077357108283046607722242991731749039240120242394966215805004807006953092369398838308007947344031314475119314416535733359885829250423280379
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							3814eff2777a6d9246d5a8aeb8122724b2744ab4
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName bbbcc347a5e4bca9c6c3a4720c108da235e1c8e8
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r10.i.lencr.org/'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (48 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'projektyporsenna.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.projektyporsenna.cz'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.31
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r10.c.lencr.org/59.crl'
 . . . . . . . . . . . . . . . . [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)
							00ef007600a442c506496061548f0fd4ea9cfb7a2d26454d87a97f2fdf4559f6274f3a845400000197d151c8920000040300473045022100f7fb74cde636f9deae8801d12a66b39b221a6a71c4bc0d220229fe190143451e022034988b78b5aedf8d3fd220ac46e221f47e25a994a7e131df68863f5af06512db00750012f14e34bd53724c840619c38f3f7a13f8e7b56287889c6d300584ebe586263a00000197d151d0600000040300463044022013d0c0755a93cdd7c56bd7a07b87d7709c6ce3486cb898b3377859ce585b736302202d6645df68be60860e47e6c7c339c099b6224a8b6620a7b5d7ed2e412b1764c2
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . [c:0|t:5|false] NULL []
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		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