academy.vnnic.vn

Issued by R3

About this certificate

This digital certificate with serial number 04:24:cf:0f:1a:38:25:b2:4e:40:1d:b2:34:9e:02:13:d4:9b 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=academy.vnnic.vn

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:24:cf:0f:1a:38:25:b2:4e:40:1d:b2:34:9e:02:13:d4:9b
Serial Number (int): 360974537547566220178711432111176119735451
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 65:31:b8:a9:5f:f4:69:ab:e4:71:49:99:00:4b:51:73:b6:67:37:a7
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): a6:a1:f7:5a:6f:50:7b:c5:65:b6:40:fe:04:ab:5b:d3:bd:55:5f:81
Fingerprint (sha256): 44:af:28:bb:b5:0e:ff:c0:e5:f5:66:88:41:79:41:bf:00:6b:a9:d2:9b:89:56:99:d1:39:0d:92:d6:ae:06:5f

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

Revocation information

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

Check the revocation status for certificate academy.vnnic.vn

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for academy.vnnic.vn

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

academy.vnnic.vn

Other certificates including the domain name vnnic.vn

(limited to 100 certificates)
helpdesk.vnnic.vn
helpdesk.vnnic.vn
www.vnnic.vn
*.vnnic.vn
www.vnnic.vn
www.vnnic.vn
sc.vnnic.vn
www.vnnic.vn
www.vnnic.vn
www.vnnic.vn
academy.vnnic.vn
*.vnnic.vn
www.vnnic.vn
*.vnnic.vn
academy.vnnic.vn
*.vnnic.vn
www.vnnic.vn
www.vnnic.vn
www.vnnic.vn
helpdesk.vnnic.vn
*.vnnic.vn
www.vnnic.vn
www.vnnic.vn
*.vnnic.vn
*.vnnic.vn
www.vnnic.vn

Certificate

The complete raw certificate details for academy.vnnic.vn in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAu0e+uf+z0f4iCKioEZM5
OISei59XSfepeLCcZY9qms7KJ1VpRe5E33yj2liwvakRGC9mUGysW0Alrmcu1L8Q
vAylpeNI927CBNXOi5hgA90smMFXSuXtVZwKdCM2+plQfqygDs1pm1DHXDx6uepQ
47A4CMQFU0YuiedYeP2l6SAsLVaapgLDLOzd1+20P1gJz2qETlleubSd0zyyek8F
nuzavgTMYjzPqgad+nqqlYhxcNO/F7kX97finWRZEE8neSa7pLr8Bc5YWqGR0E95
QHyKGu2yDqkRtaM1on1JQnPhzp8we8+4YkyZQeXkJYjWNHmwcz89+PR+LEoNe8Ae
JwIDAQAB
-----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 360974537547566220178711432111176119735451
 . . . . . . . . [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 2024-01-31 18:11:47 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-30 18:11:46 +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 'academy.vnnic.vn'
 . . . . . . . . [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 23641941819370306704965777734313039691367932792013335494673845538696277886120978445373601409363431706147618289871767807638993898757680872693544658630402664670824009970921948270233913059787522368671284040880297548440374769858763892153650336392281889347044159657808586066283119092126039661150389925505595854385062273882303712437456645646046755291829603840658534736514362500354096574722960757243169924416882781684467151178404969967030756664177810607920453405910208915724282940356181151574808998338525696722541378909246314716582238718773866159571087769900042340142213234842839661031796156589844877053947277993199206932007
 . . . . . . . . . . . . . . . . . . . . [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)
							6531b8a95ff469abe4714999004b5173b66737a7
 . . . . . . . . . . . . . . . . [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 (20 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'academy.vnnic.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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f100760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018d60ef3df100000403004730450220457f09b3853689e3808ce5be7343ef73bdc0efdc8a3b7927b37f940e06dc6f5802210082e1e2b3099d8012c1420d873d99bd2772e1693eadbe11bd72127c72190d108100770076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018d60ef3e690000040300483046022100e8969411f44c6589fbc422bb1f136aa3685cf76f26e042aedc5edd1dc5dc2102022100d5cefc12c0301d69f3d72409e9f870ca749099810ad885d657757f3612cbc809
 . . . . [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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