khaothi.edu.vn

Issued by R3

About this certificate

This digital certificate with serial number 04:c6:80:60:20:bc:c6:fa:cd:86:f1:c9:73:06:a4:70:de:52 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): 04:c6:80:60:20:bc:c6:fa:cd:86:f1:c9:73:06:a4:70:de:52
Serial Number (int): 415995692685339274030936890805043904699986
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: c1:19:c4:28:8d:fb:27:4c:e3:0b:c7:11:cd:37:9e:a6:88:24:3d:c9
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): d8:d5:d8:04:48:60:f4:fa:38:b9:2b:ca:63:49:b5:95:5a:45:bf:c6
Fingerprint (sha256): 06:8d:a5:2f:ff:2c:40:1d:8c:c0:58:0f:33:ea:9c:7f:f3:cc:af:61:00:32:be:78:c1:eb:f4:53:0b:c4:d2:73

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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3KkaRHf9qzv8ZuywaWZx
koxd1ksy6BEdc2T3kpIAaDF5CNs5PXkKlUSGnXzN9//8zIRSsJ/CJASUeqMeBE+Q
WyZLpipigIM3u1DXoOrLMc4tDXSHmfSZ+HpmBDUH4HCjV9ZoB38XuHaV6/0Y7Mex
I+MqTXSjgXL8NUVJ5DkDxpFtmZ0ld/ttlpvdrhzxY0RnmMFCugyKXyQW+ixzpkdl
BGGidR8RIQ6gzxH+PY4Rq68suyljELgDdAUcklpt4jv6k8Lh6yZzEMNz3WpeGMOS
mkiEd7FLisiT5IBjycNqjFV5Ql73j0M4K5M56mNsH5rwZ5wz7yS16XLpQtnWUZ3y
2wIDAQAB
-----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 415995692685339274030936890805043904699986
 . . . . . . . . [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 2023-09-02 01:22:17 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-12-01 01:22:16 +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 27855814696066254659574399921193020158965966133298758320684117091275858205213167834197577774672071889007124435609446249770293974689296043479475398756284946414576143637184359913780864195386645406495565343594182098519996936488475875979134138303857507732696694509500814411969759144250292577911681101380387698090558759255818942905236996928579970443186075774416639896239451644636836303989127317369910043275541388311477013640012386197474239805067282704967148153197794924424689321401602076453575912557309746851727881635423321424400255141164273102766437538720037583287953795418896016904511745744925638382771851078510774711003
 . . . . . . . . . . . . . . . . . . . . [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)
							c119c4288dfb274ce30bc711cd379ea688243dc9
 . . . . . . . . . . . . . . . . [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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007600b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb4990000018a53b2bc9e000004030047304502204c9d3bb24a868521f57ede574471529e1b06748e318323226c4a5387f9b84f9d022100c222a12205457142adf2da05fc36089b8638f93d5c955e5bacb17da09f4971f40075007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb520000018a53b2bcb50000040300463044022052c17d2893cc5516a78e8eaaf1ba1eca3a05a7c086ba1e35f026cb6d6f88289b022008711d58d3796410d3b86d991071bb6f83dbefb2bcb722e3c930f459d08bb250
 . . . . [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)
		00ba418d671b02317f6282673f1279fa22cbc725d79b31e100994338ac49da1da46c7985c2fb2bba3dcf3c58a8084e3e7843dda615d396791228fe880e5887520bdea1da4cd02d5df7a5e928fceab2228738b033d20c458245bcc0329e18f7cd289763fd309b490b99e4b13dc0c5b6f2090db0767452267952b7222deb4259e8b4c28a08e2eb556e2ff7af74c2e66e55f5f1eb88889c5a5c99a1e8e7dafcfd08c8d45030d1ab5a0f5aea7c924d694cfd2524489ecf6e57cf321fbcc8bcc16728dc90c7f93289a088ac18d37df2cfde393ef645ba04ffe3330a432126d5a73eee6009993065ec00d7f82359f212ac854690647034a853d3dfc4b9111b3f40e5c2eb