khaothi.edu.vn

Issued by R3

About this certificate

This digital certificate with serial number 03:af:be:6f:ea:e4:e7:c7:b2:d8:04:5a:f1:83:6a:65:ac:3b 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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

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): 03:af:be:6f:ea:e4:e7:c7:b2:d8:04:5a:f1:83:6a:65:ac:3b
Serial Number (int): 321139406434815003193496771731158139776059
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: f2:ed:c0:83:7c:3b:35:f6:35:ad:ea:53:bc:26:14:ae:1d:ff:da:bb
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 91:4a:42:88:57:3b:38:98:cd:ab:ad:e0:c7:2a:bd:96:d8:f8:b7:5b
Fingerprint (sha256): fa:17:9f:86:b2:c4:ae:ed:66:73:b2:d2:c6:0a:bd:4a:c1:a0:62:8a:10:e8:8d:42:3c:77:57:16:19:d1:69:f1

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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwxczygAGC5/ruS1egKCt
2wEmGo0TeN+RQ2bGAYX3DrD4BMnoihuo1Z2vHaL9IhKkjkleIx29r0KkE7cnrDHw
pzvRWHbIGi2fe/vOuJ2hnlcFO/6vn1XBT0S2ymz5Y2dfRMDtAwY9Nn3MAEOFIYNL
sXsrjtI3CXNWBAMYporOOCn82rAjpXRdJirOTnYrwwqwJvTGrAHg4Rd0G4Agi254
EIO+KRt8gSF0jgx/h1KBP5zSolk1u+Gim6zl1ePVIe6UemCdVFjBuFm7VdEcUv3T
4JREEeUYkBtmjy1y2E/8rQ67hTHtEJPFkfHBWrLd6eOD53+xuIiYA4hIYi7JNoUq
eQIDAQAB
-----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 321139406434815003193496771731158139776059
 . . . . . . . . [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 2023-05-04 12:25:15 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-08-02 12:25:14 +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 24627910949447584638984966630509736515862746200485571460055533100045056777375859551131295349836032673168109606482105568805964490992644393646195266605980016301185311919677378076722195466116234544476625102168756377526402078197049666480303525034279016411621958311410037231621376861408841507692096475223829609709419144230301571793974309628288599311001352294565928272011251159442075900363691485770730227948754558727590021027334693965479517843052056935604719374892039296097343832449846905202462829387847422183996684326762817006902001337580226977017648255783984485857954240315384216086094903676978250197035907823322370747001
 . . . . . . . . . . . . . . . . . . . . [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)
							f2edc0837c3b35f635adea53bc2614ae1dffdabb
 . . . . . . . . . . . . . . . . [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 (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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007500b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb49900000187e6f036e60000040300463044022038ef3c7dd6ec4ecdd536f8a772dfffa63b35fae32d3dae6302611a7e0ead635c02207df974d12b2c406f7a9ed736b102fc6362f612e7bbf0211a5601892a792f4f85007600e83ed0da3ef5063532e75728bc896bc903d3cbd1116beceb69e1777d6d06bd6e00000187e6f036dd000004030047304502201d33141881d909fa41126b9a4e01c273d6358aeb81e859a9130a67914bf6702d02210082091d77475d0c436df2f0ead0fdf8cc254a2802978d0e3b55fb870583af5ba8
 . . . . [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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