hanu.edu.vn

Issued by R3

About this certificate

This digital certificate with serial number 03:3c:d6:24:0c:97:57:49:ea:b3:f8:5c:46:d9:aa:43:a0:59 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=hanu.edu.vn

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:3c:d6:24:0c:97:57:49:ea:b3:f8:5c:46:d9:aa:43:a0:59
Serial Number (int): 282038441779701309337537086152783817842777
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 50:a6:ae:93:3c:2c:53:f3:68:5a:19:6e:ad:4f:cf:e5:ae:04:2c:e5
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): b8:c4:26:8b:b8:a6:fb:c7:70:7c:ee:03:46:57:56:07:87:20:48:d3
Fingerprint (sha256): 3f:c1:54:73:8d:74:f2:0f:33:61:e4:31:c8:8a:e8:3a:c1:d0:7f:58:13:8d:be:a4:93:25:3b:ac:40:7c:89:aa

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

Revocation information

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

Check the revocation status for certificate hanu.edu.vn

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for hanu.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

hanu.edu.vn

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Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnGRHlmTnM3Miwt3Gv8yS
H9kD8mWO+1Sr0e1ZG8vdHVJ9E4fD8fA7y8/jiMJnZDFDspd5q37XX2aoK8U0OR4t
YCKkSFudzDKwbSapEnyAVvD8HOwMd/aiiv0DYDgFt9RlyPKdHsAxDtV4crXQUX9h
xnRHSuq6J1PlPeSdFBUxk1DCB84I2pJ5/FPk2SETQBpUIH1a7bMB4v+X79kosEIo
31Xnl1fpJOUsoSxbG9i82QyaBu4nRTc9bsjxf1/tm7h75OJ6/J/ZVWIAjvLfN9rj
A6zZjOSYvSGAOhXb5tLlpbs1sA9dcha7/qnqM6vdpB9OrQrDhStSTEb410dTTpgx
lwIDAQAB
-----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 282038441779701309337537086152783817842777
 . . . . . . . . [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 2024-01-04 06:51:02 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-03 06:51:01 +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 'hanu.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 19742625307507032888252852865595274161190927213642179789641878177978282490870114089245366273500643479122249078749843484424570326808619520249183832635215834925473871450236022695666536091878214033756687452119554752769704689942766388404552369943292238122988520735555929658264703079228749815191959817969520678739679961317267038558428684691084720128452385606629135446585529896453893379731059324257649247444046484408869703375691668921664388673376068012471924319542309148345923701446990415423480101056882629918900386082097283180218459453988020461694229930879176043230049040644297565841960988041712261520102460205590119985559
 . . . . . . . . . . . . . . . . . . . . [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)
							50a6ae933c2c53f3685a196ead4fcfe5ae042ce5
 . . . . . . . . . . . . . . . . [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 (15 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'hanu.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 (247 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes)
							00f2007700a2e2bfd61ede2f2f07a0d64e6d37a7dc6543b0c6b52ea2dab78af89a6df517d80000018cd37446fb00000403004830460221008f32094fd0a7b796051136b29baa1ef3000132f40cc099648a79ab388591c9c70221009ed81c787d1f399bf838619db93515568a2ee79843806714859674ad50d8cd83007700eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018cd374470f0000040300483046022100896960b0b7af0a4899bac75a81cda1fa7c5c2d6f559cca2211484e8c4ae62be0022100f50f58b99fc8945c49b841591d1b09296f587a37127fa0f2498074ccef6ebc36
 . . . . [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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