crowdsensor.org

Issued by R3

About this certificate

This digital certificate with serial number 03:12:a5:81:e6:93:84:a9:cc:61:42:aa:37:10:17:98:71:8d 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:
  • 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=crowdsensor.org

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:12:a5:81:e6:93:84:a9:cc:61:42:aa:37:10:17:98:71:8d
Serial Number (int): 267681937502098700418403537988915742405005
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 54:d0:dd:5a:f9:8a:71:f7:bb:00:7b:19:22:c8:25:0d:ea:27:9e:fc
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 34:31:21:78:e2:8a:7a:a3:d0:89:c1:9c:cb:55:92:30:3e:c2:f8:3f
Fingerprint (sha256): 17:f0:4a:14:6e:ff:52:97:f0:36:52:2d:8e:1c:a0:9b:f6:47:c3:9c:80:c8:67:38:d1:30:b1:8f:b5:b2:86:fc

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

Revocation information

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

Check the revocation status for certificate crowdsensor.org

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for crowdsensor.org

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

crowdsensor.mit.edu
crowdsensor.org

Other certificates including the domain name crowdsensor.org

(limited to 100 certificates)
crowdsensor.org
crowdsensor.org
crowdsensor.org
crowdsensor.org
crowdsensor.org
crowdsensor.org
crowdsensor.org
crowdsensor.org
crowdsensor.org
crowdsensor.org
crowdsensor.org
crowdsensor.org
crowdsensor.org
crowdsensor.org
crowdsensor.org
crowdsensor.org
crowdsensor.org
crowdsensor.org
crowdsensor.org
crowdsensor.org
crowdsensor.org
crowdsensor.org

Certificate

The complete raw certificate details for crowdsensor.org in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA6v9wi9NmGdCtyekCgY0r
WM2NK55zIIc7YSCdkP1zyFJmdwMvin0hv/BVmgMWiNmS16r9yJBlwA/FXvoKL3Xo
G5y7x2Ej8mNvp4ION19yQTiX2gstw4LuTzSKgWV+WIzSjkCRBJZ9s0jUBSvMRGq0
jVyxuQke1bTz57YKNMPknJvyxOqE7XtZ05/BvnAaI43sqz6GvYpt+WeUMDhAW8pS
3FLtACOSMHf82hYRlF2yG6/JRIwZpXv4yuHY20m28osMu6fsVGO7WzQ17O6zdS32
i2kWSh4fwTwfu/it0+UwUdwb7sMHt2LxeVj0XlZrl645U+Pls/DbEc4XDBEdmrny
cwIDAQAB
-----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 267681937502098700418403537988915742405005
 . . . . . . . . [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 2023-12-29 23:19:14 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-03-28 23:19:13 +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 'crowdsensor.org'
 . . . . . . . . [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 29665725340039297432521217932731433295409873090021161146376482061210113198669138207428615200655089711643258720632474352840253630817192711369994999948312094152411169168325658438687069043842258881407475532084803195099891114073098941077574203736062388781398094083983954053906172163505662359600774413503239873873086868608260524170983164941024942605569440924724240443421005584024112946685458879434729027855753164471432516131179947728507450468940097748332470595240975957579194609100050516811786758012546030400140476626557959156350973971882261352866072580230974707930150778921429128940558000537336335530313929410206536168051
 . . . . . . . . . . . . . . . . . . . . [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)
							54d0dd5af98a71f7bb007b1922c8250dea279efc
 . . . . . . . . . . . . . . . . [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 (40 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'crowdsensor.mit.edu'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'crowdsensor.org'
 . . . . . . . . . . . . . . . . [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)
							00f000770048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018cb816db290000040300483046022100e61c80a4352ef36011f20f18c36fdeeb14da755c0b99715e9d542b64a423bacc0221008e04847a50689828f247074633f40bb6c5949192512e27a3cd5c84833cca0cd00075003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018cb816db520000040300463044022062e16ef848e0a906c70a056578f9f98dcc7604a175f1461608fb7d06b3e10d2a0220482fde22eb67bae2627fbbabbe6ba5892cb2e1cfe514d5dec83ee373ca40aca7
 . . . . [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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