refiltek.com.br

Issued by R3

About this certificate

This digital certificate with serial number 04:20:c9:02:f8:eb:4e:4f:80:a6:ad:35:0a:2a:3b:e8:86:0d 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=refiltek.com.br

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:20:c9:02:f8:eb:4e:4f:80:a6:ad:35:0a:2a:3b:e8:86:0d
Serial Number (int): 359605369728937938417342256889191931086349
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 5b:43:a0:a3:e3:c1:b3:ed:fb:b5:3d:5a:7a:38:b9:99:9a:45:ef:27
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 96:d7:26:1e:63:f6:59:84:d9:9a:ef:11:6c:85:96:f1:f2:f0:c6:39
Fingerprint (sha256): 37:65:93:18:66:ce:ca:a9:c1:32:d8:a4:25:03:6c:bb:ad:a1:50:f9:74:0e:42:2a:dd:32:7b:45:87:f3:3d:21

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

Revocation information

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

Check the revocation status for certificate refiltek.com.br

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for refiltek.com.br

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

refiltek.com.br
www.refiltek.com.br

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Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsOGh0Vy0Pa3Xbfi9taNz
m49R/XMmm39Y/XLChgvt4ZP1+HCwb3wpSHWZi9rZsjmXtGqrQ4ssPDMnKajIIfo3
NH/nUnVCALyiT6NGWv9f6wNDrNqh0N8wM3Ug2xKrjLPGZdQ0Na6Jwo0OJPiu3X2R
Igec/RNUPQDmfvTCmepn4xgEr1WOMtNqeX8jACx31wPAs9qO81gfHCgp/FV+Eby4
E1pi1+h8iS0Lsei+haAcilMvGwd2UKc3HBjGlkUqNFAhu06IPwqa8OP+hn6hVO5/
dHXoDV6K/g5ewhIilDGIWhPuwLLneFuThCrKWQmYDlnCnaYI8h6Au4tzx6z2KTu5
qwIDAQAB
-----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 359605369728937938417342256889191931086349
 . . . . . . . . [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 2024-02-29 21:09:23 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-05-29 21:09:22 +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 'refiltek.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 (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 22329205009802933365608678898904509636693480331014769094959213701698709318613014880032953620276798594845934838390183808008601645794701866589809293080316394178559867120595925957971215311755710095327649839630361720349363907993688303906331554922728418260665447766715439269047507617114953699443667032878924461590049037538607277046104178815604113362177816301721154253924509186301316638043955988600993736046407175135744888922096252939776992656049808623763281135940312098238960447112803173814433420796004311126957649610478747053990291218700031794448298714759787603966696487641075891427248356501147083167278058218515727104427
 . . . . . . . . . . . . . . . . . . . . [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)
							5b43a0a3e3c1b3edfbb53d5a7a38b9999a45ef27
 . . . . . . . . . . . . . . . . [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 'refiltek.com.br'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.refiltek.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 (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)
							00ef0076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018df6ea423700000403004730450220483a8103fc10da4b5ababaabc4ae50641000441642ae63ffc55f59ed86d583d002210095b2834dd3d464fd2ba58669502f24af5dd1cd5998a675a06da87a85624ea4d5007500eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018df6ea42440000040300463044022069c0b136865d9b432821966e9f7ada6d1f4e799762da1db645ce02f137bf0683022005301cf668ac8186800cc7b47da8d0f5591e5e69038c005c31746489dafc2804
 . . . . [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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