DV SSL/TLS Certificate for www.garten-goeggelmann.de

Certificate is witin its validity period

Issued by Sectigo Limited (Sectigo RSA Domain Validation Secure Server CA)

About the www.garten-goeggelmann.de DV SSL/TLS Certificate

This certificate with serial number 1e:c1:8d:ab:1e:9c:f4:47:bc:72:03:28:ea:64:00:db for www.garten-goeggelmann.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.garten-goeggelmann.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
State / Province: Greater Manchester
Locality: Salford
Country: GB

This X.509 certificate will expire on

Certificate Details

Serial Number (hex): 1e:c1:8d:ab:1e:9c:f4:47:bc:72:03:28:ea:64:00:db
Serial Number (int): 40881826544488899047371905598946017499
Serial Number Length: 125 bits, 16 octets

Subject Key Identifier: aa:0a:63:0c:7f:55:5b:32:6d:6e:f3:47:3b:a1:1a:9f:49:51:47:ae
Authority Key Identifier: 8d:8c:5e:c4:54:ad:8a:e1:77:e9:9b:f9:9b:05:e1:b8:01:8d:61:e1

Fingerprint (SHA-1): 4c:dd:cd:97:d0:2d:c7:0f:36:b7:6c:80:66:26:e6:f4:b5:c9:a0:39
Fingerprint (SHA-256): 1c:77:d3:78:b1:db:25:ab:ee:fe:3a:1e:a4:e4:a1:0d:91:7c:e2:b7:96:6a:50:15:cc:39:c8:81:4c:64:b3:43

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

Revocation Information

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

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

Advanced Certificate Properties

Technical details of the X.509 certificate for www.garten-goeggelmann.de

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
CA Certificate
This is not a CA certificate

Subject Alternative Names

X.509 Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0ll1z4Y9YEnpnimjPWsQ
g6HTYV2JTLqQo8ZadcD1G0hJ26u4ofzv4fN1UX/YhEoj/Jo1Y7Q7OYkqFmvBZAig
uJYZSGMxr4eXOau62o4+F2hozsrFQTN9F0hlb0PocCLG6GydkjFSWMcV102KSFU6
97MMrjiS+81KL1rPhW+T5xv4ZOAxDJn9wJ3IZuc0VVMrsn3m9JS3PHCo7MwkjLp6
8ikXikvJsyt9umPfXopnBrr4F4q9TKwONnknBYoRl6/cCjEnmi3yR0SNnqHmB5zC
maEhSwapQYMzbL0V2ZKKlCrAD47QWV9FTqK16Ct5Z5z/m3pX7Z8DzeRkLxyQUmyt
owIDAQAB
-----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 40881826544488899047371905598946017499
 . . . . . . . . [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 'GB'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.8
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Greater Manchester'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.7
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Salford'
 . . . . . . . . . . . . [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 RSA Domain Validation Secure Server CA'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-12-17 00:00:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2026-01-01 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.garten-goeggelmann.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 26554158510586400396945635467157212344547543999476795136049758413635152835255537184832687004712791981566752794336147847718906875041228076156839586060744073484844572586861620816893294927325580095954538155636070264272706741727138564400555568828818338357821745163883080522810823085194895316168850193165039028844852404067114575911289382916240714588385217057673364203910472292779899664167437704874492835314266127084824620768387087280575814451515146809549343842197294400839951606087291957556140156352284091824723555507743526718757967222566373852208544474447891777150252056590496831546271398035303140656630056662071237193123
 . . . . . . . . . . . . . . . . . . . . [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 8d8c5ec454ad8ae177e99bf99b05e1b8018d61e1
 . . . . . . . . . . . . . . . . [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)
							aa0a630c7f555b326d6ef3473ba11a9f495147ae
 . . . . . . . . . . . . . . . . [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/SectigoRSADomainValidationSecureServerCA.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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (368 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (364 bytes)
							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
 . . . . . . . . . . . . . . . . [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 (52 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.garten-goeggelmann.de'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'garten-goeggelmann.de'
 . . . . [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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