kmp.techbook.de

Issued by R3

About this certificate

This digital certificate with serial number 04:c5:56:3b:1c:6d:0b:25:d5:f3:75:56:76:67:10:89:f2:ac was issued on by Let's Encrypt.

This certificate has already expired and will cause a warning or error message in the browser it's still listed on this site to allow you to look back on previously issued certificates. If we have found any compliance issues with this certificate they will be shown below. I hope this certificate review is providing you the detailed information in a simple form you where looking for.


We have idenified some issues with this certificate:
  • DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
  • 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)

Certificate Subject

CN=kmp.techbook.de

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:c5:56:3b:1c:6d:0b:25:d5:f3:75:56:76:67:10:89:f2:ac
Serial Number (int): 415599390540164808900700226322592600552108
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: cd:45:b7:78:25:2a:6a:6e:de:df:e8:77:6b:d9:3c:3a:24:37:f1:0b
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 2a:cf:3d:6b:9c:56:35:4d:b8:f6:fe:b3:11:19:81:d7:8f:11:e7:dd
Fingerprint (sha256): 1d:1b:48:32:13:d8:b7:ee:b5:3e:c7:d9:8d:e7:74:fe:86:f9:9c:dc:1a:87:2e:32:ca:5a:0f:93:9f:b6:7b:12

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate kmp.techbook.de

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for kmp.techbook.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 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

kmp.techbook.de

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Certificate

The complete raw certificate details for kmp.techbook.de in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwEHU6ImhQ+ZtDZQXcGs8
pWH1J81nYWKrwpORb8L/kN17pqAvOKHQVjHQmnk+SpvMrx+JbHXMWC5XP8kbTaAP
ZzY5T70jZ9LhBaLUSXEG6MKXkm7NcHUA5aHKhk26YyaHeFrOGN+MntcATAix2QDS
HhbW0iQr6TM+wDDH/Atymfphz9VKMdFwe5ZirekkwncJioZR4g2+u6ohcOuzjtLB
txplBnu5djpgphgTNuSIXSJNVYlARp8S1OsFNdpzClGrWaV+CMBqO1IkpeXmADHq
Yf0sHsIvq517xcqz8Dt30j90+Wml+dr1xFqM5u11/2IYUAq7cgYEavRsqC8RUpHp
nQIDAQAB
-----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 415599390540164808900700226322592600552108
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption)
 . . . . . . . . . . . . [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 (countryName)
 . . . . . . . . . . . . . . . . . . . . [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 (organizationName)
 . . . . . . . . . . . . . . . . . . . . [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 (commonName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'R3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-12-05 22:46:18 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-03-04 22:46:17 +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 (commonName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'kmp.techbook.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 (rsaEncryption)
 . . . . . . . . . . . . . . . . [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 24270217361464528366689489636398988266387364659691973936208101251834357629794666141420242595995018362469877605244934358560956081424348727166553784063298136755749463457763710687491649700247986896820052719586904195067012430541888306273205666842462047924308641297065888023890438508829009294859189551725001144582444564552297711028264886315868706448202045033097508555747149423504233011766259616334149211088519743463096124538554663612647747095257222223883295686275253052443408139430590303329153680166623687555088537200691902178061966214673158477147666681698757931004966179899338070114162921949448231878156014432714717522333
 . . . . . . . . . . . . . . . . . . . . [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 (keyUsage)
 . . . . . . . . . . . . . . . . . . . . [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 (extKeyUsage)
 . . . . . . . . . . . . . . . . . . . . [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 (serverAuth)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2 (clientAuth)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19 (basicConstraints)
 . . . . . . . . . . . . . . . . . . . . [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 (subjectKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							cd45b778252a6a6ededfe8776bd93c3a2437f10b
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35 (authorityKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 142eb317b75856cbae500940e61faf9d8b14c2c6
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1 (authorityInfoAccess)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (73 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.1 (ocsp)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r3.o.lencr.org'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2 (caIssuers)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r3.i.lencr.org/'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17 (subjectAltName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (19 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'kmp.techbook.de'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32 (certificatePolicies)
 . . . . . . . . . . . . . . . . . . . . [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 (Domain Validation Certificates Policy)
 . . . . . . . . . . . . . . . . [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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f00076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018c3c601511000004030047304502207d153383d7eb4212989d4b83638916649035f8c8733191ce6977dbb8b164bf36022100ce224f9a2bdb5b7bd77e4e964ae0099927515ed75ab5ceb73faa290c2f62e0e3007600a2e2bfd61ede2f2f07a0d64e6d37a7dc6543b0c6b52ea2dab78af89a6df517d80000018c3c60158700000403004730450220070d62d4676ddee015636cd22459a01be48eb0d959192f82a516e863674fbc5e022100880846493fab0a8403b2b318bd2744611932693d51fc3392d436d6bad8933e5a
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption)
 . . . . . . . . [c:0|t:5|false] NULL 
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		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