link.mailer.techbook.de

Issued by R3

About this certificate

This digital certificate with serial number 04:a1:b7:7d:87:1a:91:83:a6:53:cb:72:e8:52:fa:58:89:f9 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:a1:b7:7d:87:1a:91:83:a6:53:cb:72:e8:52:fa:58:89:f9
Serial Number (int): 403478505301878298861805293322074959940089
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 33:59:52:86:12:35:62:f9:1d:48:c1:26:be:bc:90:98:a8:cc:9f:0b
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 61:30:b7:b9:da:29:ef:c6:42:9b:be:8e:32:9c:2f:5e:34:e6:8e:d2
Fingerprint (sha256): 31:27:6e:2b:79:db:cd:67:6a:e1:fc:44:3f:d5:dc:fb:70:60:39:ae:2b:45:a0:95:c2:a2:c1:6d:bc:27:40:ec

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
static.techbook.de
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static.techbook.de
static.techbook.de
static.techbook.de
*.myhomebook.de
techbook.de
pur.techbook.de
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static.techbook.de
techbook.de
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techbook.de
link.mailer.techbook.de
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static.techbook.de
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data-7a534833b2.techbook.de
static.techbook.de
businessinsider-fr.businessinsider.fr
techbook.de
static.techbook.de
techbook.de
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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA73KzslUyYwKpQY4aSzVs
DEFF0BO3i1ecIUjLYp7uNAdbe7EdfDtqbtHwTqWxEJJm3X8ot8DMHkg8rGM5s0h3
HR6BxCFFQQL33bKXDX83hN5O7YzIE+2S1Fmk62pIAmjGigJvolUHYL8zp/hbLxrM
QiLw5ZfiqCmEvgOlIt9SSLL+A29SANgCStE2PkvGpWlsDwUYdd/SLa9v8nwoTjnK
GAxH94P6rprRWJM6ndm6P36Nj2f2WyhDPZeaj9NrxUNHnIa+U8Bac6zzndXoLlAN
bLxOJ1SDQbMj65P0ByXICviJPbFPvJm7pwDqHDHSj7KUntuc8yOUOV1W/YQ3TkFH
swIDAQAB
-----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 403478505301878298861805293322074959940089
 . . . . . . . . [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 2023-06-17 15:44:51 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-09-15 15:44:50 +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 (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 30227516521530034073206076486557165179182255952577890340695892956981761992460861708812515292431279840373294416327414893225760438142864171514646254345284388073150216945564236696652598097943817069121276102257904266060544994061133204721507021464926972407651893125342420379621669621151702594502863323328854392022482509219015750863324430573710466989256322550334409172318580871144282502559198878828777341087334946458230671729544957087108225446869278483831826426227855056935804953354639865322759209833478607428530971183885119411452894684582982217216802731190762833411115777756000622705797408345244594277609152284968636991411
 . . . . . . . . . . . . . . . . . . . . [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)
							33595286123562f91d48c126bebc9098a8cc9f0b
 . . . . . . . . . . . . . . . . [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 (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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef0076007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb5200000188ca3ec754000004030047304502206a2145e9ec53a239cf7310be18685a6c4b0a6279b3398b6169ef32bbdabdc6dd022100a429769cefd40eae84195ee72d903456c5f7e22dcfe9e3230ccdd9e5e8e35fb6007500b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb49900000188ca3ec7710000040300463044022065250e38dcd69c5d661debdefbf316d1956a9a9c993bf147dafb2bd09f987239022053283119412d4eb9c01b27f36e3d78304e6129829f59049407f9f7361c62dd10
 . . . . [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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