DV SSL/TLS Certificate for spfau.de

Certificate is witin its validity period

Issued by Let's Encrypt (R11)

About the spfau.de DV SSL/TLS Certificate

This certificate with serial number 06:ff:7e:b8:ad:81:ab:6e:cb:5a:e8:59:a8:04:a3:29:15:03 for spfau.de 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 spfau.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)

Let's Encrypt

Organization: Let's Encrypt
Country: US

This X.509 certificate will expire on

Certificate Details

Serial Number (hex): 06:ff:7e:b8:ad:81:ab:6e:cb:5a:e8:59:a8:04:a3:29:15:03
Serial Number (int): 609614160784622008146089487306618999215363
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: 50:c7:0a:ec:fa:58:2e:94:d2:a3:15:cc:44:ae:2a:5e:13:da:35:01
Authority Key Identifier: c5:cf:46:a4:ea:f4:c3:c0:7a:6c:95:c4:2d:b0:5e:92:2f:26:e3:b9

Fingerprint (SHA-1): 87:04:39:95:e6:5c:e8:42:d2:e8:95:63:0f:65:5d:d8:0f:3e:4a:59
Fingerprint (SHA-256): d7:34:28:d5:c1:44:4c:43:6b:63:09:ae:2d:01:97:04:fe:a1:ce:b4:e1:b8:3f:76:de:8d:0a:15:d1:7a:8a:e2

Issuing Certificate URL: http://r11.i.lencr.org/

Revocation Information

CRL Distribution Point: http://r11.c.lencr.org/4.crl

Check the revocation status for certificate spfau.de
2
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for spfau.de

Public Key Algorithm
RSA
Key Size
2048
Signature Algorithm
SHA256 with RSA
Key Usage
Key Encipherment
Digital Signature
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 spfau.de in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4MEyq9Clzsa6hQE0Czaa
N5q+ZT8F+b0lewxWN10yimmbOdV/giI9EI9ueVmoXXgNixLYSOvIqkV075U3yUmP
QqoEAmyWIMSG8vGshZMN8lCWdk61qcY6WTpM360hAkzMDmeF2TO+8Rg5wz2Bgrf6
vUxnvNhzNQihuu0mC7zIVts5KCnDadj132fcnMDi06pW/wYnnJzqZ2LM2XEzvU/Z
Pi1HvOspa5AlM9GvVxb8RE68CwipA0cFffEfA9CCyAlWEoqAbykT9DfdBctMaAUD
nKS/D9ZMH3YxKH7SbW1AEr0LQvywO9p7qNijfQxoEPShaBlU3K+6WeZ9C3M700JF
TwIDAQAB
-----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 609614160784622008146089487306618999215363
 . . . . . . . . [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 'R11'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-06-24 17:58:51 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-09-22 17:58:50 +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 'spfau.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 28372649764486980970461189897558145056643680535969652978885382544553186680277357607553036226687856084580105051154633390658090744183574544219685958633872462519125598700746337566948059739257417398063507261728973500861530849918924985159887413175977623965756865912112830694234762476468720313144326831571356998666516972012937144429574047860393234100652109305898042173104187209065511582611921493215546526868776054287400600509242538230927242880106768976916778563077722602337816183318676822716438397786884153796601248039392469750561750915907791243864568219338119708556749200482473449669576032761496082934671884505661682369871
 . . . . . . . . . . . . . . . . . . . . [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)
							50c70aecfa582e94d2a315cc44ae2a5e13da3501
 . . . . . . . . . . . . . . . . [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 c5cf46a4eaf4c3c07a6c95c42db05e922f26e3b9
 . . . . . . . . . . . . . . . . [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://r11.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 (26 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'spfau.de'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.spfau.de'
 . . . . . . . . . . . . . . . . [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 (38 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://r11.c.lencr.org/4.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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f10076000de1f2302bd30dc140621209ea552efc47747cb1d7e930ef0e421eb47e4eaa3400000197a34d4c7e0000040300473045022020866ab02c9e07fa139c49eb630beafc9508e66442109ad7cc08017ece3f8b68022100dee58daa2e2abea585a5a1d980867f52d831632ca47b6db8bc4e68cd068e849d007700a442c506496061548f0fd4ea9cfb7a2d26454d87a97f2fdf4559f6274f3a845400000197a34d4c790000040300483046022100c33e95654a402d020dc5ef69e780603495bc05294bd9b5b9cb9c60369bace380022100913b6f5fbffb497739bb3fb7cccbe29204107f21dd481e2b8ea365ca76ab3478
 . . . . [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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