www.namu-ev.de

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:40:53:c2:94:68:c8:c3:04:e0:ed:bc:f0:f1:bb:7f:61:5e 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=www.namu-ev.de

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:40:53:c2:94:68:c8:c3:04:e0:ed:bc:f0:f1:bb:7f:61:5e
Serial Number (int): 370338551449320235029630998944403890856286
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 2f:3f:df:02:05:1d:39:b2:60:fc:ac:01:94:6b:86:7a:ab:af:7e:c8
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): a4:77:e3:12:eb:bb:20:7c:3c:47:ee:9a:39:0d:ae:78:96:5a:7a:86
Fingerprint (sha256): 23:c9:01:47:72:5a:61:5a:01:06:0f:5f:fa:cc:bf:73:56:79:5d:96:75:ec:ad:58:e0:e1:36:56:c2:b2:80:50

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 www.namu-ev.de

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.namu-ev.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

www.namu-ev.de

Other certificates including the domain name namu-ev.de

(limited to 100 certificates)
www.namu-ev.de
namu-ev.de
www.namu-ev.de
www.namu-ev.de
securetest.namu-ev.de
namu-ev.de
www.namu-ev.de
www.namu-ev.de
www.namu-ev.de
namu-ev.de
www.namu-ev.de
www.namu-ev.de
namu-ev.de
namu-ev.de
namu-ev.de
www.namu-ev.de
namu-ev.de
namu-ev.de
www.namu-ev.de
namu-ev.de
namu-ev.de
namu-ev.de
www.namu-ev.de
www.namu-ev.de
namu-ev.de
namu-ev.de
www.namu-ev.de
www.namu-ev.de
www.namu-ev.de
namu-ev.de
namu-ev.de
namu-ev.de
namu-ev.de
namu-ev.de
namu-ev.de

Certificate

The complete raw certificate details for www.namu-ev.de in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqh5f7EtDZ9eOCPSMfzmM
Z/EtcPu9/kVXnH8ph2C8XS4GAvh4sgnCZqLu3eQkc5mcDOxiumxwpCNFUrHMLSFs
HftPk85do6YlG0eOZt5yn6ABiWfggHNRwevxm2auT+d4UHV/aD34vMeNmzGOxeD6
AXb6FuF01q0R5iMDw3xACCmDk+hJEw2EW2oxvtmHc12koayIpDqeRJ8X/4dYiAqR
MmkASkAGc7ztM28cONxPjsU+UMaOD7ZFCvqs/+p5mq/aLl8ejGSTSaks+R7G2g1g
DbgfVeTWx951yJ5vjAOQVqhDLjMfOM1c2KVedTCKw/gEYHk/ddSagN7LLHS0DYnA
xQIDAQAB
-----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 370338551449320235029630998944403890856286
 . . . . . . . . [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 2018-09-13 05:33:31 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-12-12 05:33:31 +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 'www.namu-ev.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 21475490166709579396914085482843708329058718508645798141164726600881022538114518921795218161210564909720112256818414265450919973027566970644246592149959473634522063360803289575156502195330454232430875950917986337150614224464757675999552313090195341579766851508366478198026821878601535562107515520480007134036087881968409393903768999502747169846581860342821331019648754575552153254149616705089752830820746138590356886490423727000148957467463972333094258568083349403946041861500767428709465469494860739406361614298158195308920718317290048484983441599282267556521235616574571261681107155522520679020635374786940869656773
 . . . . . . . . . . . . . . . . . . . . [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)
							2f3fdf02051d39b260fcac01946b867aabaf7ec8
 . . . . . . . . . . . . . . . . [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 (99 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 (18 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.namu-ev.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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007600db74afeecb29ecb1feca3e716d2ce5b9aabb36f7847183c75d9d4f37b61fbf6400000165d1a27bbb0000040300473045022100e36ec91c97e7604c64a01822a102d1850144b00d5d40df17c74445c0b767ce0b022041e2936ab9c20ae6609d89efba1c7e0511ff85e4691019bb831faf72967aaf0d007600a4501269055a15545e6211ab37bc103f62ae5576a45e4b1714453e1b22106a2500000165d1a27bc90000040300473045022100f17d1e9fc7e4f79a21bdf021222ec6fb64ddbb2c921f6485cde60059cf0908d9022057540ad36a725b22b5b4d8d6f88e2a1b390e7e86318e9168dd4ef92c626c6e3e
 . . . . [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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