neumann.education

Issued by R3

About this certificate

This digital certificate with serial number 04:5d:be:8c:58:d3:3b:a8:9e:f9:03:75:f3:be:f3:0a:c1:ea 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=neumann.education

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:5d:be:8c:58:d3:3b:a8:9e:f9:03:75:f3:be:f3:0a:c1:ea
Serial Number (int): 380348685893035243458010474209689905840618
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 33:bf:7a:07:25:b4:23:00:60:73:ab:d1:20:2d:90:68:c6:d2:4f:bf
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): b6:bd:60:bd:74:a1:32:b2:da:73:f5:c8:d2:a9:53:11:e5:13:45:26
Fingerprint (sha256): 51:f5:20:e9:20:51:e1:6a:47:88:d7:1f:94:2e:26:f0:51:de:d7:7d:15:f0:34:12:35:de:ea:f8:fc:21:5f:40

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

Revocation information

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

Check the revocation status for certificate neumann.education

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for neumann.education

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

neumann.education

Other certificates including the domain name neumann.education

(limited to 100 certificates)
neumann.education
neumann.education
neumann.education

Certificate

The complete raw certificate details for neumann.education in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA2sAYL4hS46ZhpBqrPnMg
hNbo7DLA6Oh021XEqNSug+Hd7Nbz81EFpPHcxLYUMD+tdvglvdRz95UuzCHRl89v
zjVp/0NyH/fmpncwSEFjdDpbRCPDXPE1dhTfm5nB0jDKZgo4uyMOHyM/4ApRoM7t
LqjzgMWS3Dz5f1KD4om6NeeUeegNK1YqhsZ9l2Gh0/OY9T6pd3u9BDn9ygK2G9rL
aTfFHIbznqVPVVFawZEBuNIBrZX0NznWm94agnrKFSV4BLDh19dWunBSI9d2mj+k
gIjwZ9P5o5kHmPOzaSVPmjV34qrEQShXv6VgGcM5D6uqrzl9Se73Co+su3bAhUUE
yQIDAQAB
-----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 380348685893035243458010474209689905840618
 . . . . . . . . [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 2023-11-22 20:18:10 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-02-20 20:18:09 +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 'neumann.education'
 . . . . . . . . [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 27614675798826480505024305644000344191671433795082245016006585475824859067001262739138020664174031997111976143019679934083270636571568998559977502224837505646679769031569598783007771840259741531688021321207744611428893992720373519572762592440075060741721628275696649911111171150466899922733573654051400439402484328139889558594581296612155037700458134761320147382457121685977014581338385563709160907708863342453208727647087148107328289360477174720190828491519349493883372190442835959142849934576575068696718004222198666057536952327492486322566463564422846326672992010294612629476877352889044427283894649264662141797577
 . . . . . . . . . . . . . . . . . . . . [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)
							33bf7a0725b423006073abd1202d9068c6d24fbf
 . . . . . . . . . . . . . . . . [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 (21 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'neumann.education'
 . . . . . . . . . . . . . . . . [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)
							00f00077003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018bf8e5c8c000000403004830460221008577bd0928888e88d5612eee123639620b475d7117a10705cc8a7aad53c40f020221009a04eca0ae899bc1794e0006e78f6049af35686aebfa95043dc46056dff7f0b3007500eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018bf8e5c8c600000403004630440220366ff494a76c0319e6995e8bc12fc1940b7e549ccd036bce915b8f65faeda6d302203fb4a3784a3b4796766082a6e82d9ac6bd73b5d98b1f37a925d6ec0ed8766fb5
 . . . . [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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