doufutuan.us

Issued by R3

About this certificate

This digital certificate with serial number 03:2d:ac:08:fb:b8:46:66:fb:17:29:72:41:c6:3e:09:df:0f 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=doufutuan.us

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:2d:ac:08:fb:b8:46:66:fb:17:29:72:41:c6:3e:09:df:0f
Serial Number (int): 276878238165857425470540297111123991846671
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 23:80:62:d0:12:1e:74:28:bc:53:ff:e3:58:19:6a:93:1e:30:4d:3b
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 91:60:db:f7:9b:8b:78:77:70:75:a3:15:af:b1:b0:84:21:fd:88:d1
Fingerprint (sha256): 53:9c:f9:eb:a3:2d:b1:e5:59:46:db:6b:0d:09:ae:6c:6e:a7:48:fd:1c:94:bc:83:e5:37:65:dd:54:95:5b:d0

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

Revocation information

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

Check the revocation status for certificate doufutuan.us

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for doufutuan.us

Public Key Algorithm

RSA

Key Size

4096

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

doufutuan.us

Other certificates including the domain name doufutuan.us

(limited to 100 certificates)
ww11.doufutuan.us
doufutuan.us
doufutuan.us
sublidesk.com
doufutuan.us

Certificate

The complete raw certificate details for doufutuan.us in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----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-----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 276878238165857425470540297111123991846671
 . . . . . . . . [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 2024-03-28 10:16:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-06-26 10:15:59 +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 'doufutuan.us'
 . . . . . . . . [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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 835608699867778192929565062502225195359661842562689957941653237651719070699580608750294641616442846258959393834350923706513503716211471787511193207794335110701709026931777682047613318447684892309228366101432348813102660148086768239762395991139033434340117504198601987484955610867402336314085966075001818532565441800111659641077223867810846240933050201306238989466206082530187034999844884745944922619309787222193042170526383892938228595909270840410393010765918704032168699904579281607940505740809349579565139834383184678264354187441914396749777966302445806259771738074922667540693222067041628267022694010573604653339096963727807036182759778025794544091865880479415344213195300598628592142145157413927500171690017596056507419568847113093317611731942238767335099590286576727614222891630018184237067508371225613960294680105750494719314971041744041020080556763789140044677698040488201025974655259837820755569975275288170112646801598268847522828844328100729744869071569268595204022049820654605235469341243456434025048561295516729270212861550368217124088795847653304347428767205104456323451207778905726003531432438158982225378859082773174776667347700865868590449117129694483180862506139049903679159829384376367549102868328054451804244824489
 . . . . . . . . . . . . . . . . . . . . [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)
							238062d0121e7428bc53ffe358196a931e304d3b
 . . . . . . . . . . . . . . . . [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 (16 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'doufutuan.us'
 . . . . . . . . . . . . . . . . [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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef00760076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018e84c6218d0000040300473045022100eae0218a714a9231599a103f6bf30406f020648e9c9ba48e1f099fcae9eeefb102207ec7cbf1219e7a138c66162b5110a5b2276a8d9a09a3a9ba123b2f6802dddba800750048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018e84c6260d000004030046304402202212cc6dc87fae63a289afc272a8da9556e9fd38590ddb7719be79c9d008b122022041487f4a67b2f4516212d1feb99f98338b136fb82c504007a2024c8ae06481a6
 . . . . [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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