id.ou.edu.vn

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:62:67:6a:b4:42:2d:d1:8c:8e:b9:61:d5:46:f7:a1:bd:dc 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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=id.ou.edu.vn

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:62:67:6a:b4:42:2d:d1:8c:8e:b9:61:d5:46:f7:a1:bd:dc
Serial Number (int): 294821994276642527923864612425687927733724
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: b3:15:30:d4:a7:8a:0b:75:32:1a:9e:3d:33:dc:e9:67:73:13:92:c9
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 80:92:07:ea:42:88:16:7b:7d:33:8d:a1:dc:af:fc:1d:bb:5b:d7:9f
Fingerprint (sha256): 64:ec:d0:b9:63:40:14:63:ca:f2:70:86:69:cd:b3:48:b5:03:36:93:d4:44:60:96:dc:7c:a4:7d:cf:26:91:92

Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x3.letsencrypt.org

Check the revocation status for certificate id.ou.edu.vn

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for id.ou.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

id.ou.edu.vn

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support.zea-iot.com
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kqtkden.ou.edu.vn
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elosupport.ou.edu.vn
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thi.ou.edu.vn
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kqtkden.ou.edu.vn
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sg.support.te-cloud.advantest.com
journalofscience.ou.edu.vn
sg.support.te-cloud.advantest.com
id.ou.edu.vn
id.ou.edu.vn
id.ou.edu.vn
kqtkd.ou.edu.vn
www.patolo.jp
help.webspecia.in
support.1rink.com
id.ou.edu.vn
support.sisoy.id
ceats.ou.edu.vn
kqtkden.ou.edu.vn
id.ou.edu.vn
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support.vicoimaging.com
devlms.ou.edu.vn
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devlms.ou.edu.vn
id.ou.edu.vn
kqtkden.ou.edu.vn
id.ou.edu.vn
kqtkden.ou.edu.vn
id.ou.edu.vn
lms.ou.edu.vn
help.webspecia.in
pm.ou.edu.vn
devlms.ou.edu.vn
id.ou.edu.vn
help.webspecia.in
id.ou.edu.vn
dichvu.ou.edu.vn
id.ou.edu.vn
id.ou.edu.vn
support.epigrid.com
pm.ou.edu.vn
support.namastepay.com
id.ou.edu.vn
id.ou.edu.vn
id.ou.edu.vn
devlms.ou.edu.vn
support.okra.ng
tienichsv.ou.edu.vn
id.ou.edu.vn
lms.ou.edu.vn
www.patolo.jp
id.ou.edu.vn
kqtkden.ou.edu.vn
id.ou.edu.vn
support.namastepay.com
id.ou.edu.vn
support.zea-iot.com
zoa.ou.edu.vn
help.webspecia.in
devlms.ou.edu.vn
id.ou.edu.vn
support.alephys.com
support.okra.ng
id.ou.edu.vn
elosupport.ou.edu.vn
devlms.ou.edu.vn
kqtkden.ou.edu.vn
kqtkden.ou.edu.vn
id.ou.edu.vn
support.epigrid.com

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAh3cOoYsD6uQ+EWlCfAjz
xSSK6ZZIC+tdfVWG8P7Q0MUU5UTrqP5qXR2PtQ4Ffk+tPKd8HRYL9ntJCBA8ln1S
1e8N0iWAjIcP9CSavYDg+91kmkWte1WBcTf2XEweSdurN4xilspP6/lM3ddqreiu
I22kikU2alRtcrrUVpllDr8AXVeravgnrtpwGc61umOpIn1IMDXvIDiFbMphQt8s
V1mMrDrhAwqy6iZU+uJ7DE8b3OqmcoVNrh5zfWthzoH5ANAOeyPU/LLiGaE4RTWR
VuYZBsj6UEBB3cnjpv93PQy4SL/49skxrjFkUY1FaGsUugPphUkj78KUSzDnOyPs
5QIDAQAB
-----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 294821994276642527923864612425687927733724
 . . . . . . . . [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 'Let's Encrypt Authority X3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-11-28 05:07:42 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-02-26 05:07:42 +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 'id.ou.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 17100880440415958807717588356637804987746560627938107864194131259255421177409885910489823793169760174292018666092067964550021194005730539511296266055280053534660210640312036246940046174993127533709089825246600486557581571208653912528213067743731653059686480708296295124765690117965010604368592540222396238520299529206658638315685504395081758485257636419441108877311646407710795272711898217753244485876927307569141915952410849991332215054872118285374424365433449546852733050997136233395136464548165888933670614754101036832536035647186046756750481232264948265756689118206318743498326504786838112180496223933221096910053
 . . . . . . . . . . . . . . . . . . . . [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)
							b31530d4a78a0b75321a9e3d33dce967731392c9
 . . . . . . . . . . . . . . . . [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 a84a6a63047dddbae6d139b7a64565eff3a8eca1
 . . . . . . . . . . . . . . . . [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 (99 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://ocsp.int-x3.letsencrypt.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://cert.int-x3.letsencrypt.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 (16 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'id.ou.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)
							00ef007500f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016eb09f549c000004030046304402200cfa2a44fc6acf8195358c74c0d44d001e390361e6372b46c6c97528b8d41d5802201e259ce47ac328ed42b530d7e2fec7ef330dad90f50ae33555b72c98603685b8007600b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016eb09f549600000403004730450220319cbdb3bda00ad684a3d9737e457ea6233301eaa6f9b27236f8bc568bd3eb72022100c22812de8fb1e614714e802351faaed1e7de6f55b511e4f5b815dd803e6511c3
 . . . . [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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