hanu.edu.vn

Issued by R3

About this certificate

This digital certificate with serial number 04:ea:a0:c2:80:15:ac:92:35:49:a5:15:0f:0f:dd:fd:f8:32 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): 04:ea:a0:c2:80:15:ac:92:35:49:a5:15:0f:0f:dd:fd:f8:32
Serial Number (int): 428288903969322358189866031977513476814898
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 07:36:d8:59:88:b4:ec:d6:3c:d2:87:d2:65:b5:bc:33:0f:ca:9b:be
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): da:9f:84:4b:be:f4:33:eb:6b:de:2d:c1:be:5f:29:09:ac:19:0b:dd
Fingerprint (sha256): b4:d0:01:4a:3c:7a:50:74:31:f1:e4:f9:c8:13:ca:0a:1b:9f:31:2c:d7:f7:97:7a:33:20:cb:f8:1c:b6:54:38

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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzSkKHRldoxLgxg9z1Jrs
Ws+oxc514dguDcmTJ6BVO5hVS0btYpFCle3wnDHDK4FjdRqBm1dIY0ymCIvLiLlu
3W/8a8cObCMkJBWJuDyBL74oCmIh0dU1jc1lspJn9FYqW5eVgXcy2SKyFksuMY3s
KleijbFoGPOBZ/YVATDP9WhztY4ngWBu0X02dw5amI8sWr9AN1zn6KmIVwlKmJU1
aNQ9WaPkQ3znde0BZrPQ3g4pdGDXiYlvvCVw5LjlZiTNJaWNUQGGDUbli5f7tEfO
7/vJj+Qq6r5dIVIYbpNsmXIrWNry512JvEnPX4ntSBdLkV3iZIV1ulakvOFuVEX+
zQIDAQAB
-----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 428288903969322358189866031977513476814898
 . . . . . . . . [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 2023-09-19 01:22:08 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-12-18 01:22:07 +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 25899089852961253546675184576116791979019287878139921236891829567256941923196949851048095223185016854636831995938531951169191857783423130941352497078337384386020400598635215684852535670356402744280167805223594344693448801299749869859072802185729932232538826903228371250295418355953129771562606302531837089079375921288240447003920740343564151774922873676308094041622984614636962410976000403352266794680073307575953913061793510842570436439675962190557429999261791742162417607589810241622447373185835374292204641592342462597017184085276449562181134736333946776580850637824294580955055064585742063401993844220287854706381
 . . . . . . . . . . . . . . . . . . . . [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)
							0736d85988b4ecd63cd287d265b5bc330fca9bbe
 . . . . . . . . . . . . . . . . [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 (243 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes)
							00ee0075007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb520000018aab3eb5a7000004030046304402201a5b7ba93f571bbd7dd3b76af00f304fa66e337c944a110b79a31dff268b9d6302202f0ea287340bb47930a5a7b5b2a2277d8986c3e6a4fa4009373aa0b6bc3e9f82007500e83ed0da3ef5063532e75728bc896bc903d3cbd1116beceb69e1777d6d06bd6e0000018aab3eb5940000040300463044022062ce6f8d67575e68a299203900ad94cc12945ae8de0ea3910a21792b3cdfe35c02201220e7c6f84f741a0616448d078e2d5e24fd5aec3365c9f0b91343898e7536be
 . . . . [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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