rt-forum.de

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:15:9e:7c:e8:04:e5:8d:38:f4:57:89:9d:dd:4b:1c:b4:bb was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. 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=rt-forum.de

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:15:9e:7c:e8:04:e5:8d:38:f4:57:89:9d:dd:4b:1c:b4:bb
Serial Number (int): 268693454074671906191141390291334464320699
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: d4:8a:fe:30:a2:93:2e:c5:82:cb:89:91:62:e9:7a:ca:bb:50:d3:5c
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): de:0f:ed:cd:f3:6d:a5:1f:26:13:8c:11:00:c4:ec:6e:b9:18:a0:a4
Fingerprint (sha256): 9c:5d:72:85:88:1b:45:8b:b0:81:6d:30:38:83:b7:26:5f:c5:dc:59:66:70:eb:8a:b2:3c:6a:5f:3c:77:c7:aa

Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x3.letsencrypt.org/

Check the revocation status for certificate rt-forum.de

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for rt-forum.de

Public Key Algorithm

RSA

Key Size

4096

Signature Algorithm

SHA256 with RSA

Key Usage

Digital Signature
Key Encipherment

Extended Key Usages

Server Authentication
Client Authentication

Extensions

8 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

rt-forum.de
www.rt-forum.de

Other certificates including the domain name rt-forum.de

(limited to 100 certificates)
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de
rt-forum.de

Certificate

The complete raw certificate details for rt-forum.de in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAruyEhuDSbuY8a4sHpDab
0CPe5nd0f1MoT75T1Ypr1L0vR/amKzhjm3pWDgEzb3ve6QDuMXjXsNevy1SUkAk+
UAFvklnHWMeSBjbLoScydaTkgVn1RxfYK4ZDxuqqb6dxR43ekxUz+k2yjCXZBwRe
W7lL0PnqmJl7asHns7eII8BQ90IDub1do0vBHiqrnSyVIk6bAkTG6b2lYJaENBxP
+5g7nI3kfTYSnLUrmd7k9Xn0yCx6XQBtMkm6NTjZ9bzvz+pHnMtjuO+XOz/nzOa3
otn5eLZ0p/RN5PJvTcED2s/WALOddDdyLdkRoM74H0/WPFh7Ft5A4QsYfIDZTm2k
Jdc4U0cUqle5x8Rv3Kq2YofBLd6yDbFkGPV6VsH9BgK4kmivi1yY1Q5eJejqZtZG
DQUA8q4+3YlSM8aHfpmJxoA4kJCWMJZLXHzgnJ2kOwFu222KwlCz1k6ORWaaFJrh
ohUy6ikR4o5LbJVz3gBCStcLsDAVJO8rD8xbRBBT7iplcasgjdR3C5HXrkF2dZWD
fOVtqaJCp23nP0idAhVYvx/DEt7c/8HMs/XiS4Ib/WbCn1CK3RZltnUQ8NVEHnL7
qFYh26VS+whiYDtSCvkuHlQaeCRp4jqOI7966tFV4xMLgn/qcuD/JJKbWOAs2YKZ
IIOsRgYaC1S406eY0LnB8lcCAwEAAQ==
-----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 268693454074671906191141390291334464320699
 . . . . . . . . [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 'Let's Encrypt Authority X3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2017-03-20 07:14:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2017-06-18 07:14:00 +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 'rt-forum.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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 713627239565001004643533431713786486455541189534547990564351029557890466157909795200792850340102856853485162067616879672716636490669211276243914811954161781524427797395814576375353716683979135123979583875222273645397942797816506140794246123884466860787401180904064814618214330128512875918400753344936100889114518524806765275364216427016497744419405405676614105766272865253676593504868464444085571966400907196281108923619921921774739008792623914680677448346664522279580644926511377361274737648372804569347779347392504187131913794157144415733001869979173041599677319950106098239561310571059386619443951956257087657094894771757111867175816076070937391788080552306792790349077803003044390860666471883305595642926550776255590138488098006017971586300544137085065372740167853299604291089154619187920455375502602666074878077499967370455254447596823561079237606650550076692143127326214984490243326576123106700594059561591041387386524306988127145010130960642351148534260217686665314981847953275216011873207238472442816542817549371258182661865845270829700019535442957306730335845424947410858811202333784231216161414007259005002133542641810114293784656511613412143179408879828316657636930140233883217012702141196296787190061973241658270875251287
 . . . . . . . . . . . . . . . . . . . . [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)
							d48afe30a2932ec582cb899162e97acabb50d35c
 . . . . . . . . . . . . . . . . [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 a84a6a63047dddbae6d139b7a64565eff3a8eca1
 . . . . . . . . . . . . . . . . [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 (100 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://ocsp.int-x3.letsencrypt.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://cert.int-x3.letsencrypt.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 (32 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'rt-forum.de'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.rt-forum.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 (246 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 1.3.6.1.5.5.7.2.2 (unotice)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String 'This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/'
 . . . . [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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