qlu.ai

Issued by R3

About this certificate

This digital certificate with serial number 04:90:b5:60:7a:0f:33:dc:67:82:fb:4b:21:37:3a:ac:34:ed 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=qlu.ai

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:90:b5:60:7a:0f:33:dc:67:82:fb:4b:21:37:3a:ac:34:ed
Serial Number (int): 397690895767050058712888362156658397033709
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 72:d0:d3:1b:58:d4:0f:e6:22:3e:d3:c2:74:2b:16:7a:f4:84:8b:74
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 13:1c:2f:d4:6f:43:0f:a9:50:b3:28:2c:b1:5b:f8:9c:1a:92:43:ba
Fingerprint (sha256): 77:e8:98:38:87:dc:a4:df:a6:fe:f0:14:3a:19:a8:ce:cc:b9:f2:0b:e6:7c:63:7d:75:2e:2d:12:aa:38:1c:ac

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

Revocation information

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

Check the revocation status for certificate qlu.ai

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for qlu.ai

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

qlu.ai

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Certificate

The complete raw certificate details for qlu.ai in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA5p728O6nl5xZcReD3XEr
Mpq2yaRYAR/wSCGCeBplCwMZIO/aOItJ9DK6jZhtBOu4mEitatzEdDH/wJyaxHhP
sfsdSBDgwIk5iFKxGQzGKYqxM7T0JApwf+IehhOb22c/32PSbnM8iaz/AaLVz6hB
y4auUllzbOYf4XOutx9BND7GxB0xozeFP0zcJpI456N0OLV+9JT2ZhiKQ7CcbRZi
qOhb2zydjkDUMP7y6wnqxvyW9kQFw0zEAtz1ipx+uALNvo9cyqA5RCQuZAbhu7jL
FZ3YZL/BTreDsWL89kkg1InssQIrqww/JrFhYiZvo8b8lJwlUb0ieJNCyms2jXnr
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 397690895767050058712888362156658397033709
 . . . . . . . . [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 2024-01-13 23:35:24 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-12 23:35:23 +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 'qlu.ai'
 . . . . . . . . [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 29113198514849835618117556970600552429720958322996853548529558569128403396731740871267976089960019909652687296897045129646319134721572943181419922565017496689961188071788958282476530121740913947401203778369996330805801157842544787363664110214758503280524262134631466056983822150909580007990682651112654738565014003810235463292749831772463302513508572521437751619945002799084267788904589396082892723951423114748165845664405420440455481065075282305663244049518123554600760165652555957951842710512997646464793368285492302696692708347059491282249445745578916558806141523510829281958976488536628940794432237816519465757497
 . . . . . . . . . . . . . . . . . . . . [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)
							72d0d31b58d40fe6223ed3c2742b167af4848b74
 . . . . . . . . . . . . . . . . [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 (10 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'qlu.ai'
 . . . . . . . . . . . . . . . . [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)
							00f00076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018d05650b8d0000040300473045022100d32cb60b712f291c1dcbea7890de0ed682a3d9c9453ad2a70c85fb6795637995022065f628815babd089f78b5c37aacff4afe1e504c5289fd3d43927e6966243038a007600eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018d05650bc10000040300473045022034faaf8c1a534b7cc3fc905b44bd0262602c0d73ee6deb13303e2be8a5795b6e022100e40bc6a8ef5c66231f7032b907b5c3a715381fa3f2b17e0a875697aac420a9f2
 . . . . [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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