crowdsensor.org

Issued by R3

About this certificate

This digital certificate with serial number 04:29:8a:36:a8:9f:fd:a1:f2:27:24:31:6f:c8:53:16:de:56 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): 04:29:8a:36:a8:9f:fd:a1:f2:27:24:31:6f:c8:53:16:de:56
Serial Number (int): 362584438038368729600971761956044028698198
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 78:06:4e:46:6d:52:94:03:82:04:ce:a1:db:d1:9f:9a:f9:ec:31:23
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 2a:aa:1f:b4:7e:ff:96:50:a8:3a:3b:31:d7:7e:3b:2f:92:bd:bc:8c
Fingerprint (sha256): 3f:42:5a:e2:20:d9:e9:7a:03:01:57:07:38:c1:11:3d:1c:70:e8:8d:26:cc:54:8e:c6:3a:1a:bd:5b:54:bf:c2

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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzgj9gLzK0shT785saUx+
/VSYkpymHGtI4Vck0/3HN0yF+GxSOvvwS1x2g3GAiqjHiaruyM9HiTKb0JcpmkmB
WHVNJZ8/9MXcHd5LzVJPY/aT/3nX6DyAj7um87uuDEbCcEGKcIh8N8Jdgdq0yMMM
kp7NZBtpnX0nvCxih7LYvH8l48Xj2rVXlxp/wTWJ0RFm7tKiqkxK7eEgg4URa7ob
VoIsMGQX1G2X7bvL48s1BMAm89GY8tnjvwHb2s+r3MPdcMpnu+mSm+HtTxO1+JmI
18GdlGjGTVQDEPm0zVZj2IpZy3/y0blx3UhgLgPbvsg64WORBRpXoN5zlr4GgA9J
oQIDAQAB
-----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 362584438038368729600971761956044028698198
 . . . . . . . . [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 2023-10-30 22:17:30 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-01-28 22:17:29 +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 26009524078356881657958941177051699870529541989466993952389455490649153734141301874043396067006313830348457891905546673023018905150431687157020927463135265860222981524006692059293323839078096924540072064397534677976252367396140485165666059238688937683290976439825347444130372692266218501309864256686140031200572899986306884652021160783931695440336679863350627548226599987053894376824589938906039048257050885770498039102384779833947294256458733933313184612427141891271008938122285791922189565992959716695333884254433042348655061093147080599973919566783834153091763146945261022089402213324320981817847107709246666394017
 . . . . . . . . . . . . . . . . . . . . [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)
							78064e466d5294038204cea1dbd19f9af9ec3123
 . . . . . . . . . . . . . . . . [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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007700dab6bf6b3fb5b6229f9bc2bb5c6be87091716cbb51848534bda43d3048d7fbab0000018b82e0c56a0000040300483046022100830fbfa6623f44703a04196963299757899f055d0e008a12b680ab3b15250710022100836e093b34ceaa686b745098ab00618ce8c60d1458d05f709258eadaf596b0ad0076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018b82e0c5570000040300473045022070d38228a84821240a323025130af784cfdd61d1d3a356e9ec9d4708e607762c02210088502d704357efebfc71daaca4cb2f6c1194dc1f77879ce261ec454645907fb6
 . . . . [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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