khaothi.edu.vn

Issued by R3

About this certificate

This digital certificate with serial number 04:6a:22:db:0e:f1:88:f6:07:ea:70:40:45:40:40:91:d6:e5 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=khaothi.edu.vn

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:6a:22:db:0e:f1:88:f6:07:ea:70:40:45:40:40:91:d6:e5
Serial Number (int): 384565405788619278992072295474481440347877
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 47:da:80:31:6c:73:f7:92:0a:07:ba:c9:be:ca:14:b4:5c:e2:0e:e1
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): ca:1e:74:33:3b:dc:87:49:ad:66:84:1b:6e:22:00:3d:44:e8:70:2b
Fingerprint (sha256): 65:b9:22:71:d9:63:2c:45:bb:d5:c3:d2:91:59:6d:2e:e4:17:ee:c0:27:bc:1b:fb:7a:28:92:06:f8:b8:91:68

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

Revocation information

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

Check the revocation status for certificate khaothi.edu.vn

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for khaothi.edu.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

khaothi.edu.vn
www.khaothi.edu.vn

Other certificates including the domain name khaothi.edu.vn

(limited to 100 certificates)
hubt.khaothi.edu.vn
khaothi.edu.vn
isos.khaothi.edu.vn
utm.khaothi.edu.vn
chuanchauau.khaothi.edu.vn
isos.khaothi.edu.vn
luyenthidaihoc.khaothi.edu.vn
toeic.utm.edu.vn
isos.khaothi.edu.vn
isos.khaothi.edu.vn
toeic.khaothi.edu.vn
toeic.khaothi.edu.vn
khaothi.edu.vn
khaothi.com.vn
khaothi.edu.vn
ielts.khaothi.edu.vn
khaothi.edu.vn
ielts.khaothi.edu.vn
chuanchauau.khaothi.edu.vn
isos.khaothi.edu.vn
humg.khaothi.edu.vn
chuanchauau.khaothi.edu.vn
ielts.khaothi.edu.vn
khaothi.edu.vn
khaothi.edu.vn
khaothi.edu.vn
khaothi.edu.vn
toeic.khaothi.edu.vn
isos.khaothi.edu.vn
isos.khaothi.edu.vn
ielts.khaothi.edu.vn
khaothi.edu.vn
toefl.khaothi.edu.vn
khaothi.edu.vn

Certificate

The complete raw certificate details for khaothi.edu.vn in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAu7eMcCnsmST//z8NY6bQ
4jszwp9+ztJHWGEivSDSbrq37dQOypA8LZEXtrIaQiTmsu5pAfXa9K2djsWaH4VI
Bs6PcqBIc0/yul0t+yeT2G8Uad2g03QMDqAKKhN6GzepQvM4tM1GhOcO+hryw4IB
UTg4b7QNDozbkxxS2yRL3wx/ZJIGOhbxr7n55dY999jtTzHoElkeuu3PT8SjUZUy
Nkbg3xQhw08dp6g3f9eFCDSvRqZZ6PbssDNcZM5dB5w67milTseg9YdHcAlv1m7M
E5AnSv6glkgELLCZaJjsPt/wEBqocUsnFxvc0byBRD+MfY9Aif1S6myNBWJmLOBE
1wIDAQAB
-----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 384565405788619278992072295474481440347877
 . . . . . . . . [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 2023-12-31 14:26:21 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-03-30 14:26:20 +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 'khaothi.edu.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 23697074210045782076584951696937422247511074876434583409967112443827482615718024494738012679898440408939516997997759407750361868487685059837895195925061340693403976726035460835334821389526311346038731558780914853473915165890855881295541679936635183544125993031829849340908579618105019690214371605455659661623179895776000929596285344383948957560509480744317419924901538550880955725788808702920292300157886292541340603102561444807494672445133635945503818771896150706948577477256861007653813855198754409891140988236192120704933442461423062575262203319069319873199470933986300704895319027706714389194551232373325645759703
 . . . . . . . . . . . . . . . . . . . . [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)
							47da80316c73f7920a07bac9beca14b45ce20ee1
 . . . . . . . . . . . . . . . . [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 (38 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'khaothi.edu.vn'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.khaothi.edu.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)
							00f00076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018cc07bb5190000040300473045022049a553e1d3ac92ddae9ea808195524effda4f108bc90fce9a148e981b0424996022100f415b26979bb922def9aacfd6d6c740b0da4b2dff736933e0cc2cf158f8df14500760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018cc07bb902000004030047304502203f1c2ffb3f45836178313fa2006bd4634aab4b26782d2b24e54df6989e725475022100d931b089d8aec0ae18e8305fbf53b188be7d4501927a756163c5ba0105769a67
 . . . . [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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