DV SSL/TLS Certificate for www.katharina-luedemann.de

Certificate is witin its validity period

Issued by Sectigo Limited (Sectigo Public Server Authentication CA DV R36)

About the www.katharina-luedemann.de DV SSL/TLS Certificate

This certificate with serial number c8:8c:45:5c:f2:ae:62:54:bf:02:34:3b:a8:95:c1:1b for www.katharina-luedemann.de was issued on by Sectigo Limited.

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 www.katharina-luedemann.de 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)

Sectigo Limited

Organization: Sectigo Limited
Country: GB

This X.509 certificate will expire on

Certificate Details

Serial Number (hex): c8:8c:45:5c:f2:ae:62:54:bf:02:34:3b:a8:95:c1:1b
Serial Number (int): 266573927567537843550917888875204821275
Serial Number Length: 128 bits, 16 octets

Subject Key Identifier: 4c:d1:83:d5:5d:ac:f7:0e:18:5b:46:02:87:1d:7b:2f:51:e6:af:75
Authority Key Identifier: 68:c0:12:16:18:0e:af:ce:f6:87:a6:32:57:a3:46:51:5d:cb:07:27

Fingerprint (SHA-1): 93:6d:45:93:fd:56:b4:59:52:b1:db:3e:d2:2a:cd:dd:6b:46:92:13
Fingerprint (SHA-256): 41:8f:af:dd:ca:d4:ef:75:ef:86:52:f6:b7:0d:5c:29:da:e5:27:68:f3:35:bf:ed:4a:7c:f1:20:f2:52:c3:0b

Issuing Certificate URL: http://crt.sectigo.com/SectigoPublicServerAuthenticationCADVR36.crt

Revocation Information

OCSP Server: http://ocsp.sectigo.com

Check the revocation status for certificate www.katharina-luedemann.de
2
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for www.katharina-luedemann.de

Public Key Algorithm
RSA
Key Size
2048
Signature Algorithm
SHA384 with RSA
Key Usage
Digital Signature
Key Encipherment
Extended Key Usages
Server Authentication
Client Authentication
Extensions
9
CA Certificate
This is not a CA certificate

Subject Alternative Names

X.509 Certificate

The complete raw X.509 certificate details for www.katharina-luedemann.de in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1RXlVaA7nZ4p/2rcd0p3
79bWTbuhFa6mqQoYITd7DupAOXA07Qz7NoWeKHYJKsln55ZPOnc2HvGkQqELhxnP
R+Mi1+n5UTxamNvWkgTtj7Y2iZADCjzxQl5L4M84FBgK/T9th5hNXu9jQFpsKuI5
luIUhIA9pf42IswjWlWINxvOzeiCaHmuyDg9fTyHc0eLpmZKaczU+Ep42z0ihAN3
KWNX7SovBNUMvURLwe9hfGK7W1SY/UraYasR0+r4R9qOesqrShpG5K1hTOXAtTR9
ye3wTWovKXsJKXeDqQQPehRvzBCcLdsHdF8dxrYdK96rqNTFnFQSBHary0yfyRDl
7QIDAQAB
-----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 266573927567537843550917888875204821275
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.12
 . . . . . . . . . . . . [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 'GB'
 . . . . . . . . . . . . [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 'Sectigo Limited'
 . . . . . . . . . . . . [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 'Sectigo Public Server Authentication CA DV R36'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-06-17 00:00:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2026-01-07 23:59:59 +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 'www.katharina-luedemann.de'
 . . . . . . . . [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 26899556197807176496318482995015789889323492600258839347517169777253329065719691265307194306156426990079937990872063728141507351701243312343507735043867688016367805221470906078057367081925410451709859416362434892810030278857244697719220234894897195496201378978297573068110346053446718905695552759286898339510345652549717049040471345477918131825956821536314184430538741314009164147576150679064353041191249784368532151771700973680076163847688549705121479711177841157254193871834590344560391143581322475827327154544773141190435326998830472752197733322508429605952978596501509240164226184052257516576343968062483712763373
 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.35
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 68c01216180eafcef687a63257a346515dcb0727
 . . . . . . . . . . . . . . . . [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)
							4cd183d55dacf70e185b4602871d7b2f51e6af75
 . . . . . . . . . . . . . . . . [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 2.5.29.19
 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.37
 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.32
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (66 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.6449.1.2.2.7
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:22|false] IA5String 'https://sectigo.com/CPS'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 1.3.6.1.5.5.7.1.1
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (120 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://crt.sectigo.com/SectigoPublicServerAuthenticationCADVR36.crt'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.1
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://ocsp.sectigo.com'
 . . . . . . . . . . . . . . . . [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 (54 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.katharina-luedemann.de'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'katharina-luedemann.de'
 . . . . . . . . . . . . . . . . [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 (363 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (359 bytes)
							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
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.12
 . . . . . . . . [c:0|t:5|false] NULL []
 . . . . [c:0|t:3|false] BIT STRING (3072 bits)
		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