vietkobio.com

Issued by R3

About this certificate

This digital certificate with serial number 04:73:47:44:c3:a8:e7:bf:27:14:6e:25:69:2c:4d:d4:fc:77 was issued on by Let's Encrypt.

With 4 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=vietkobio.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:73:47:44:c3:a8:e7:bf:27:14:6e:25:69:2c:4d:d4:fc:77
Serial Number (int): 387676348155287945421160171309239132028023
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: a4:29:9a:4b:10:81:6c:bc:a7:f6:b3:6f:27:10:59:dc:42:78:e9:e2
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): a8:dd:c6:10:97:e2:fd:95:61:14:af:03:53:1b:20:fe:da:fd:8d:23
Fingerprint (sha256): 45:bd:d5:b5:2e:5a:2b:5a:04:1b:40:3a:5c:c1:82:d8:01:3c:4f:0a:b1:4e:95:ad:92:27:0f:78:c3:12:e0:98

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

Revocation information

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

Check the revocation status for certificate vietkobio.com

4

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for vietkobio.com

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

vietkobio.com
vietkobio.duy1.name.vn
www.vietkobio.com
www.vietkobio.duy1.name.vn

Other certificates including the domain name vietkobio.com

(limited to 100 certificates)
safure.vn
mernus.duy8.name.vn
vietkobio.com
en.vietkobio.com
en.vietkobio.com
en.vietkobio.com
catechvn.vn
www.vietkobio.com
safure.ihappy.org.vn
www.phuquocexpressboat.com.vn
safure.vn
safure.vn
en.vietkobio.com

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvb2lvtUzT55RiIeSDCg/
Ioy4njymmmRMnssbXwP7Vm6xVt7R4MJCJa2SJbDL4fX7K4tYGrmFdT8X6MCvs/5W
JmsbpNcu5Di8YUWRIL8K0XxULtfpSZWn46V+hZrneqYC+KLu0eCRm7dAeVGUu8iy
7bbxGmiXO3OFuQM7/30Hih0WXOc62CnAzvqoQ4F6+oCU6MdJPBgReD3LFUYO1461
rbjir+sTpPLwWH6SNsVYJrXspPBOlJgKAa8T86G0j+lECglzPVYTe/RkpvsYTSuw
svppcHHz2HulQk663ToiJihp3o/zXpUXaZG/MXkYLCLS1tm9aG/pPWvQinbEADre
GQIDAQAB
-----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 387676348155287945421160171309239132028023
 . . . . . . . . [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 2023-09-15 13:58:49 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-12-14 13:58:48 +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 'vietkobio.com'
 . . . . . . . . [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 23952558278278761434754345607360509294611090170558506042715960576426167384607219422880723765058172712434046835512584460994219411186312263544634023526977626048024356360111790250795819712355632791084839961466821790162795356086948803504192276334131967614727237538135451672955690559100707875555803517775558992060602465405055403119409127723237585196477177239420480380476339826518664026969728428133821605681367362662173101059297340822975134962395304158615456704748410889523624329409038278514452122175032567307274136409293699352175873908318404844161648827401240849079008583321527673625862422947012891974488580701735783947801
 . . . . . . . . . . . . . . . . . . . . [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)
							a4299a4b10816cbca7f6b36f271059dc4278e9e2
 . . . . . . . . . . . . . . . . [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 (88 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'vietkobio.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'vietkobio.duy1.name.vn'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.vietkobio.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.vietkobio.duy1.name.vn'
 . . . . . . . . . . . . . . . . [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)
							00f0007500b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb4990000018a995a0929000004030046304402202a0b5bf98bff4d3c5f2a4c0d3c3e42689d5be223b603633d7612fd05d9130f49022004140db7fa048b094ea8eab043a4f24e81f2d298d05b87af0cd7a7a842a19ff0007700adf7befa7cff10c88b9d3d9c1e3e186ab467295dcfb10c24ca858634ebdc828a0000018a995a09600000040300483046022100a2ab6133e38c8a121ac0302336a3e127043d2bd0334d7640fc8d3b0005674180022100d093f0824e27bc1a98d82f232f26dbe911ea4cb0934be77182984d88b150a119
 . . . . [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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