DV SSL/TLS Certificate for projektkawa.pl

Certificate is witin its validity period

Issued by Let's Encrypt (R10)

About the projektkawa.pl DV SSL/TLS Certificate

This certificate with serial number 05:7f:24:b0:13:ab:fe:9a:77:2f:d2:db:25:af:da:06:80:97 for projektkawa.pl 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 projektkawa.pl 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): 05:7f:24:b0:13:ab:fe:9a:77:2f:d2:db:25:af:da:06:80:97
Serial Number (int): 478826056708848371383290815374021898961047
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: e8:ae:b2:dd:68:d7:e1:b9:fc:35:70:48:51:90:5a:fc:4e:3c:52:f7
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): 9c:38:af:24:8b:6c:2f:ac:b4:49:37:8f:6e:be:22:1e:a9:cb:2d:6c
Fingerprint (SHA-256): d9:3e:7e:2f:67:cc:73:a6:10:e0:c5:e8:db:24:76:c9:c0:71:da:9d:e8:68:c2:bd:07:8b:b0:95:5e:9a:a2:64

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

Revocation Information

CRL Distribution Point: http://r10.c.lencr.org/24.crl

Check the revocation status for certificate projektkawa.pl
2
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for projektkawa.pl

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 projektkawa.pl in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvbvylfmDGFaq/zuYU5Ia
Vx4qUYd3Gl2s6Dg9xQoQUXgugNtQ+8exoUUpeFaXGcguVrITcdY+tXz/gsnv3yFh
HPokmDGgnB9JZ9IyvW+kIBcMpNoDlWRntbJhV98cUju0yI+QSbjqXdM9wTVc/X6h
VW/rmzvNpa2QJOkrfVhuwc9RuAWDwjvvFyG7d4LHSKoKzoT5GqeSPEXiqFYDNL6s
x/3ddTATxZPrkdL0CGtCQJKAauHS8FgpCAKXs8/KSMxJJXS8MkPN5Axcx8UAC5gy
QkIgpECc849X04Ouc4yM79g5OqAkJHmsxlKQ8witgOo/Q5S8QuoNNvHdfX6l0S0g
wwIDAQAB
-----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 478826056708848371383290815374021898961047
 . . . . . . . . [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 2025-07-09 10:56:52 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-10-07 10:56:51 +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 'projektkawa.pl'
 . . . . . . . . [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 23951720054850894814050630106458243318719257398137646851020381062296744778034577027182991755848434190562647988792992032395024950011336623796847471166729911157723209820553511985879442979154827572341986131058316536773180460338018465090951357492406566709153774835978115948082245270058182837037537909085269933164364160281663172424387087755135289702516460774003718715385686884389616717237313215119354459730320344806724090401060685148705955460002342684050044840468041323658474089241430866929327755494380022233162313268897120084201983512767799039308403196490870092909951589261689960977991017759013288496296907359336228790467
 . . . . . . . . . . . . . . . . . . . . [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)
							e8aeb2dd68d7e1b9fc35704851905afc4e3c52f7
 . . . . . . . . . . . . . . . . [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 (38 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'projektkawa.pl'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.projektkawa.pl'
 . . . . . . . . . . . . . . . . [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/24.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)
							00ef007500a442c506496061548f0fd4ea9cfb7a2d26454d87a97f2fdf4559f6274f3a845400000197ef0a598d000004030046304402202fe973390d1b8e1d40973ca768b93fc2489fc52ec01b7a32f1cf5342bc772299022071c4870641aad7f9f150d020aaf2257e22d2213b765f0eabfe92f5c511f203cb00760012f14e34bd53724c840619c38f3f7a13f8e7b56287889c6d300584ebe586263a00000197ef0a598a000004030047304502200b65eaa88030060de3e58beee58eaa85c214ee18ed92ffefec94382de73e637f022100e85cf47c57572cdaf7a1526c46ac33431b88fffe58a58196e3cdf898d72c2db8
 . . . . [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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