conteudo.qualiex.com.br

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:2e:c4:9f:18:fb:be:6f:09:5a:33:77:b1:fe:6c:14:74:a2 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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=conteudo.qualiex.com.br

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:2e:c4:9f:18:fb:be:6f:09:5a:33:77:b1:fe:6c:14:74:a2
Serial Number (int): 277251201442741295473386698620785403393186
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 75:79:86:16:fd:6a:d1:60:95:13:d6:fe:b0:c7:41:3c:fd:1e:94:a9
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 1d:7d:3c:9b:1f:44:4f:f9:1e:b5:89:58:43:35:ee:92:71:16:8b:85
Fingerprint (sha256): 81:08:01:05:e2:5c:53:4d:69:a1:29:f7:f4:4e:91:9a:12:21:f1:1a:5a:50:9c:52:8f:7f:80:e3:eb:ba:05:af

Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x3.letsencrypt.org

Check the revocation status for certificate conteudo.qualiex.com.br

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for conteudo.qualiex.com.br

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

conteudo.qualiex.com.br

Other certificates including the domain name qualiex.com.br

(limited to 100 certificates)

Certificate

The complete raw certificate details for conteudo.qualiex.com.br in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA4KhhN2lLlOhae1bFPWuI
KFj+3AJQkDTi31zCrsWzxVu7Zdv7INx42pIo/W1NMVAS8aVSWVWHlsFgXju2cBkL
nqMO0p+WTTvLJg6PdNey3iRYtt9amnCSPgjE/LT3vPXDkK/P/Twyr2/Gz0G8kVoT
f2X4c2w2dGb7tqJqylV789+4zamYlXM1TPgg2eLeD32ttmdQjRsM6ry+0GMbgLcK
bbOMhwC5zC+Dc+STbaE/wwhTCeR0vZqAh2lUtk2Hug6x0Et0TXfD0KjdSG4yqV1x
bR5L84kUbR/KLmS1im/jt4HZnAo4NkbcnchlPcQoes7owGhWqkzYUbLF1fHsU39F
N9MmhIO+P1LLCXjO++CuLZtHU1byQcXLFVBGafoZ6ZPkmewrxd084jHZ8HMBnLog
2fifdxzHvl6r7fazJ5qblyj9EMe2VPWCbAnRrZ498nP6V243O9eRAGOOzRzu+s13
td8UmpZ5Q7YQ7h3o/us07ndjmw7kZpLs7fcmNdLzOLHxFK7dQJjJnX/Zz166THRj
d/+EkivVPv+S9x5LSdduo0yzQQlFdKFQIo6Ns70oVpUXYjfQR8rzb1kjekltU2GM
zhRwnUIDmhp1MRRAYiB0p9HamGeLQTpB8bvr5ydzxv198hIyscMfY2JQ0LT9tkpx
gfMuPkYZGVaBCsg3A/jJVNkCAwEAAQ==
-----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 277251201442741295473386698620785403393186
 . . . . . . . . [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 'Let's Encrypt Authority X3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-04-16 12:10:29 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-07-15 12:10:29 +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 'conteudo.qualiex.com.br'
 . . . . . . . . [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 916523589421822036715268758600098577568185565568008063116601562250607249298490927898339153206413075337513273910051339193566601802102454608078066788953426153192256095331256482751409153792561231599430023328517008134285552800947879146118477391909464072786018749927452780419430453003600411083370882055577980042782110391711107464714081819205296796080047711276578215559971081320759767891018404229174350469340658094447032710109097951893765962410212195878636008169185204112317711649491974999244940862724844539148275720632846624704045123658178424150879795797629484258989974042842438283112723306361834460623206485340384153310088038444121449180116238059084915790292701757613166859202709767817567863301474598901265844944774017685138186912945424465418172321424550510875569048981457827341572739995981681717719020581379486405475141348372475587544261617134128157022991098783014192076703728022640446769639403584750353475678844098638741125666185665727062294871653069777332072738062881877258448878181356827195861057539123133042954651077414352442728155133984982941648539883060825920987931729225370223028010609488310662081316764280881670270220317464942211989484012907799370712371121671565049438068634396286607650097580896728934980106953076596940196107481
 . . . . . . . . . . . . . . . . . . . . [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)
							75798616fd6ad1609513d6feb0c7413cfd1e94a9
 . . . . . . . . . . . . . . . . [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 a84a6a63047dddbae6d139b7a64565eff3a8eca1
 . . . . . . . . . . . . . . . . [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 (99 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://ocsp.int-x3.letsencrypt.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://cert.int-x3.letsencrypt.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 (27 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'conteudo.qualiex.com.br'
 . . . . . . . . . . . . . . . . [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 (69 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 1.3.6.1.4.1.44947.1.1.1
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.1 (cps)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:22|false] IA5String 'http://cps.letsencrypt.org'
 . . . . . . . . . . . . . . . . [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)
							00f1007600747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016a26453164000004030047304502203f1ce46412dde2b99c1caea542b19841f701854d32e72117664539ea48d5988c022100e676f10d9c38d5f9129476bd8604cba4700a0b450d30099613fb98a614c8799f007700293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016a26452f910000040300483046022100eb8f4b2af23e737600aa7a220b5798cccf57174d387e76a72090f8fe1b66f8d4022100dbf8d5372eb685bb8212cb956ea7cf57ee3ae196243a7eb06403be5846f0360c
 . . . . [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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