link.mailer.techbook.de

Issued by R3

About this certificate

This digital certificate with serial number 04:0a:8c:a4:0b:4e:cf:17:60:83:b4:b9:cf:fb:b5:39:62:af 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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=link.mailer.techbook.de

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:0a:8c:a4:0b:4e:cf:17:60:83:b4:b9:cf:fb:b5:39:62:af
Serial Number (int): 352038911081695453129451547133318205629103
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 20:28:a8:89:01:76:ab:5f:de:06:0d:c1:36:1d:9a:78:ef:90:bd:69
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 27:eb:7f:9b:0a:7f:71:75:f6:ea:51:9e:6f:de:3f:00:44:dd:25:ac
Fingerprint (sha256): 1b:0c:4e:df:ca:6a:fb:99:38:0c:bb:da:57:03:45:c2:a1:b4:86:e1:58:52:86:a2:c2:b3:0c:92:f4:6c:4c:77

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

Revocation information

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

Check the revocation status for certificate link.mailer.techbook.de

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for link.mailer.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

link.mailer.techbook.de

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static.techbook.de
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static.techbook.de
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techbook.de
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static.techbook.de
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techbook.de
link.mailer.techbook.de
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static.techbook.de
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businessinsider-fr.businessinsider.fr
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link.mailer.techbook.de

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvekIK/cPekWymCVoURH2
H0ysMJuw7g6oDwC4MROTRlsZYy2Dlq6rIcs55fJgBxP6O8WMvgp4Yu6C/mxzm7GL
5ahvYxTGUm1xrVCMaKpMFM+hxDSJeAy9WYlIQ9epWWGyJctjZl+YnC7O+DxsZJoO
XE7ziO34AH8ZYGw0GzO1oantyk4lPfgScCdbfC3U3hia4IMXS5OsKr+dfl+02GWl
RzBQpq+bfxFkEkDVx9eLL55X8Ist9Pc2Obn6V7A9mpo1GU5xZdcLCgzCeCKs/1Ie
wjo0VnFpBrS0m1PuMaACcu0Ss0SORzbJ30p99tnKMNEIG9PlZCJjh/YoVIGE73up
WQIDAQAB
-----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 352038911081695453129451547133318205629103
 . . . . . . . . [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 2022-08-21 20:29:09 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2022-11-19 20:29:08 +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 'link.mailer.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 23973951961599058580463444881948408215361729580306316720082838402104588872925965533815714648852789517584857166771782210032068634940507156089291444802273615691976744689556983132538067028051214027509691236687817430194525689123304798704034698602708042964233518361502008949255075297000444716279576919779394221017243023607426792852973290567168777366308547181369830325405843512005824383322135497762023356338617571410750792846209410584124810738952628461362249908493415570949085599867263596354651436955368307740293861799055197049659848500827986639537130089901602326145925835742541865406498118843708122000156392183968558721369
 . . . . . . . . . . . . . . . . . . . . [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)
							2028a8890176ab5fde060dc1361d9a78ef90bd69
 . . . . . . . . . . . . . . . . [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 (27 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'link.mailer.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 (69 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 1.3.6.1.4.1.44947.1.1.1
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 (cps)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:22|false] IA5String 'http://cps.letsencrypt.org'
 . . . . . . . . . . . . . . . . [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)
							00f00076002979bef09e393921f056739f63a577e5be577d9c600af8f94d5d265c255dc78400000182c24f40b90000040300473045022100cea58d7a407f71edfca35c1d0c289419403514912e0f247b6329c3e75be90d3802204f7288ea823bb6f58d05989dabe168c94506dd64a5b2833f270d220a5f3e8d380076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d91300000182c24f42d0000004030047304502203ea9a6cab725298db377465b59e79b11f94ae03eb3e267879770fa00e5e1a31d022100c0a36cca5532f1f56c28871c8bc6facba4e4143c92667c4cf2af59fda83dfa18
 . . . . [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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