DV SSL/TLS Certificate for studienseminar-gym-os.de

Certificate is witin its validity period

Issued by Let's Encrypt (E5)

About the studienseminar-gym-os.de DV SSL/TLS Certificate

This certificate with serial number 05:3d:bc:f7:22:93:68:fa:7e:ce:7a:3d:44:86:05:e1:f1:54 for studienseminar-gym-os.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 studienseminar-gym-os.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): 05:3d:bc:f7:22:93:68:fa:7e:ce:7a:3d:44:86:05:e1:f1:54
Serial Number (int): 456569832102791057475972501303373838020948
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: 60:f0:09:c9:16:a7:07:e1:b4:f2:b8:90:a2:40:72:f1:c3:7e:b7:31
Authority Key Identifier: 9f:2b:5f:cf:3c:21:4f:9d:04:b7:ed:2b:2c:c4:c6:70:8b:d2:d7:0d

Fingerprint (SHA-1): 10:e5:ed:3f:cd:c4:82:2b:3d:ee:7c:e8:43:80:d4:79:73:41:14:72
Fingerprint (SHA-256): ba:5c:8e:01:b2:10:23:3a:b1:c2:87:d6:67:b4:2e:3b:67:d5:af:2c:74:9d:ae:61:c7:bd:97:15:70:c3:64:63

Issuing Certificate URL: http://e5.i.lencr.org/

Revocation Information

CRL Distribution Point: http://e5.c.lencr.org/85.crl

Check the revocation status for certificate studienseminar-gym-os.de
2
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for studienseminar-gym-os.de

Public Key Algorithm
ECDSA
Key Size
256
Signature Algorithm
ECDSA with SHA384
Key Usage
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 studienseminar-gym-os.de in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEBiBNs7gTch4CQyL1CkSWKvK95Kab
6SkVQcXSxysWAp37mR4zATblSqSQinDWmMU8fv5SPw5UoaZ8lZlFBhQl4g==
-----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 456569832102791057475972501303373838020948
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.4.3.3
 . . . . . . . . [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 'E5'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-06-16 20:23:45 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-09-14 20:23:44 +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 'studienseminar-gym-os.de'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.2.1
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.3.1.7
 . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (520 bits)
				000406204db3b813721e024322f50a44962af2bde4a69be9291541c5d2c72b16029dfb991e330136e54aa4908a70d698c53c7efe523f0e54a1a67c959945061425e2
 . . . . . . . . [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 (1 bits)
							0780
 . . . . . . . . . . . . . . . . [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)
							60f009c916a707e1b4f2b890a24072f1c37eb731
 . . . . . . . . . . . . . . . . [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 9f2b5fcf3c214f9d04b7ed2b2cc4c6708bd2d70d
 . . . . . . . . . . . . . . . . [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 (38 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://e5.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 (56 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.studienseminar-gym-os.de'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'studienseminar-gym-os.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://e5.c.lencr.org/85.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)
							00ef007500ed3c4bd6e806c2a4a20057dbcb24e23801df512fedc486c5700f20ddb73e3fe0000001977a9f15210000040300463044022066021a397b98d94a0214fea1f012d994c612a83c638c1b6f59508779786b6fbc02200250e64c408e45c58e81697ae3f8c928f73d7aac904bf465a71a73a02351b37e007600ccfb0f6a85710965fe959b53cee9b27c22e9855c0d978db6a97e54c0fe4c0db0000001977a9f152f0000040300473045022100b8e79a3a905dc1901e9c33528caced208e873f5ca63a800066f2c17226893db402207e0e8f3b81aaf38a7683fc426c201d755036bbe7debb688d662b8545fc656bdc
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.4.3.3
 . . . . [c:0|t:3|false] BIT STRING (816 bits)
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:2|false] INTEGER 4629547283346737573248520109023498874701587557751666928605884340567594614990423537307582920768426802648150366105725
 . . . . . . . . . . . . [c:0|t:2|false] INTEGER 1248418715311766937774587298787043834234097440416803450494393867974129653232651025008858779975234588974618281648440