ikim.mit.edu

Issued by R3

About this certificate

This digital certificate with serial number 03:66:4b:df:81:55:1a:80:e0:b2:48:2b:ce:9d:86:e6:e8:6e 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=ikim.mit.edu

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:66:4b:df:81:55:1a:80:e0:b2:48:2b:ce:9d:86:e6:e8:6e
Serial Number (int): 296146511826273220268801888410100170156142
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: eb:26:9a:17:26:a5:75:09:4e:62:3e:a0:42:d0:73:3e:99:0a:9c:0f
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 31:d1:51:5b:35:36:8f:db:28:4a:1a:4f:be:00:33:d1:1a:f7:24:f6
Fingerprint (sha256): 00:d3:f1:eb:2a:ae:a4:61:2f:ec:83:f1:48:dd:5d:c8:e4:eb:0c:4d:0d:16:21:32:35:3b:ac:89:66:b3:27:8e

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

Revocation information

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

Check the revocation status for certificate ikim.mit.edu

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for ikim.mit.edu

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

ikim.mit.edu
www.ikim.mit.edu

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Certificate

The complete raw certificate details for ikim.mit.edu in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvnjyNmMp66sDXOJo3J3e
hn1cpwqKqz1z6DHEqAtQKZAfsfhUguRuKeIwQuzMh/LQy7Zt3DGXPamojh5nA4Mw
gICZ2b/O/D0yCYklfwAsgv15veetK56kevX+vUmghSUCfGrgpxTVFqO5xHZl4PkL
nx8LRJTmlzVYc8VBMa122sUhZ4c9Lp06x6TYwBtXgGeZXSxShUF6lR1CORGDksAH
89TGpdrVa9CQ53pryT6TL9ljwktMoEd8pkzEKvCBYPW/DC6Mce60O6qvnzEYLqZX
lWNbnlPTDRLOM7yy5bmkv9CKSA2StiXm45YZXSo25LkU4egu3L+YpQwziX2ZkKan
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 296146511826273220268801888410100170156142
 . . . . . . . . [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 2023-11-04 03:05:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-02-02 03:04:59 +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 'ikim.mit.edu'
 . . . . . . . . [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 24044918709203071681822634759159432907795482647253312670603919556580823590406253546058584629225668588022218145380527043831716742258996253412119008845525215139201072694944594790414765339740946395864475405084345994070745196914682301270274563872676928703698726218847485867490094067407491177303398943863833146236899401509835406106254589607872807683281530528903929248743835072750324225959848896553268539276324064375664035549278328880660023886301524432340125867799308765769820892408829795601971100636971303089609594410124890180638938625023903403613592527480246610871781922268308044403270934581620197828936824845804044199881
 . . . . . . . . . . . . . . . . . . . . [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)
							eb269a1726a575094e623ea042d0733e990a9c0f
 . . . . . . . . . . . . . . . . [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 (34 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ikim.mit.edu'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.ikim.mit.edu'
 . . . . . . . . . . . . . . . . [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)
							00f100770048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018b98816c3f0000040300483046022100e3bc69f0772a4eeca16c2230fd9ccf44bb6ee99ed2ee6d1cbd9a51308b1aa633022100a471be7780e81750a3d99762eb005ca75ed327184b4eb067738101187010a4860076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018b98816c3f000004030047304502210093e6e679495d289221c26d5c219462bdb62453f2b9a23eced6ebcc735dbf7c820220517551f9ffcbef9c284282cd8050ebe90d9d5a79a5f8ff3e98f85ebfd71e973b
 . . . . [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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