DV SSL/TLS Certificate for kang-fu.ch

Certificate is witin its validity period

Issued by Let's Encrypt (R11)

About the kang-fu.ch DV SSL/TLS Certificate

This certificate with serial number 06:86:5a:8c:1f:b7:93:1c:38:b9:17:25:fb:ef:c4:f4:2c:5c for kang-fu.ch 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 kang-fu.ch 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): 06:86:5a:8c:1f:b7:93:1c:38:b9:17:25:fb:ef:c4:f4:2c:5c
Serial Number (int): 568391910842447051155810613883247632067676
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: 5c:b4:1f:61:1d:55:ed:65:d8:78:ba:f9:6e:be:53:87:47:77:ea:35
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): a5:68:39:be:22:8c:08:e4:d5:bd:94:55:c4:5a:3a:b5:50:64:6f:9b
Fingerprint (SHA-256): 4a:01:99:b7:74:e1:31:c5:0f:2f:d2:c8:a5:76:0d:ef:1a:7e:ac:c2:d3:42:25:16:1a:39:77:cc:4e:dc:4f:c1

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

Revocation Information

CRL Distribution Point: http://r11.c.lencr.org/93.crl

Check the revocation status for certificate kang-fu.ch
2
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for kang-fu.ch

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 kang-fu.ch in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1edZEQOI5ty+wvL2TK0V
VO0BC+d+w0zqrhLj00A3kKqFrgQeanrMALiOdQ64PCwfbEEKa7BySZv5crzidM0f
JS/vIDNNg8sBJ56yQnsXuxuswafE1K7hIF1iNEky9ZA+chCVI/5crv5Zn/IttVCC
rzpz2n+QEzxIVDO2RPrmOasxt2L/v/FNWYaWKVsCRN6Ncs9fuhNDJuKyWv2GHtx7
AK+MkmoWCYkNlP1OaKXfwRdEHJaeZKqKuPNXlV9hyw/95YeVR8/peJ4z3HneNhd9
yG7ltDo4HfNUmWDEMmvr8R2/J4yjqZjkTwcSZs0X2xOlSCcCbjuU1IusIwlwYm7n
vwIDAQAB
-----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 568391910842447051155810613883247632067676
 . . . . . . . . [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 2025-06-07 02:08:47 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-09-05 02:08:46 +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 'kang-fu.ch'
 . . . . . . . . [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 27002840866972087106886508971965153925943592418427337192201097842628497361800623993218441349849954736331359159257749861561125028169058585453058613047933404119067657044793151656612479770595299473902707439354154627291646411111591888131467200089751375605405513661862151947782158408190596340369571605404712761824238182160342339953502996011936946784144889913163013880245410159032200598851264109870880725639178776819256195662920174438604052495755733994642745836136402819791201347996959535320938750944989021806639884282387858860652722108660529119953331906201714329780621511676160086988689166190722037419691933381064852957119
 . . . . . . . . . . . . . . . . . . . . [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)
							5cb41f611d55ed65d878baf96ebe53874777ea35
 . . . . . . . . . . . . . . . . [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 (30 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'kang-fu.ch'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.kang-fu.ch'
 . . . . . . . . . . . . . . . . [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://r11.c.lencr.org/93.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)
							00ef007600a442c506496061548f0fd4ea9cfb7a2d26454d87a97f2fdf4559f6274f3a845400000197485b62e80000040300473045022100e61b4042ad7e15ae1fd7b295b961e6d1c10874e90ca1ebf013ea6f4b58d4f16f022006a0e876541b5d19cb83e7ca55a778321eb286c7972e54dc3f7676c711339ac100750012f14e34bd53724c840619c38f3f7a13f8e7b56287889c6d300584ebe586263a00000197485b6a1b00000403004630440220343607ba3a820d99b0b717fd73a87d55cdee83081812411e411eb55b09d6be620220695d61850c5194241f7d417ae23f15e7903b47b80fcc9f828d882ddecbc4bb82
 . . . . [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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