3b2.ou.edu.vn
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 04:a7:d6:2b:a1:c3:2e:ca:a6:c1:47:b3:6a:16:7e:fe:2f:da 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=3b2.ou.edu.vn
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:a7:d6:2b:a1:c3:2e:ca:a6:c1:47:b3:6a:16:7e:fe:2f:daSerial Number (int): 405560980343632518158414651440410673426394
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: fe:16:7d:3d:ef:5a:cb:7b:39:bc:03:0a:8c:9f:df:63:19:d7:d3:dd
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 17:19:16:27:b7:0b:37:e1:b2:85:73:8f:1e:ef:08:e0:c8:5e:64:09
Fingerprint (sha256): 01:89:b6:ad:70:e8:68:01:06:b2:c3:69:30:cd:f7:5d:1d:5a:f0:ad:48:f9:5b:9c:21:83:36:fc:1e:ae:01:b9
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate 3b2.ou.edu.vn
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for 3b2.ou.edu.vn
Public Key Algorithm
RSA
Key Size
4096
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
3b2.ou.edu.vn
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(limited to 100 certificates)
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Certificate
The complete raw certificate details for 3b2.ou.edu.vn in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGUzCCBTugAwIBAgISBKfWK6HDLsqmwUezahZ+/i/aMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDAzMTAwODQ4NTlaFw0y MDA2MDgwODQ4NTlaMBgxFjAUBgNVBAMTDTNiMi5vdS5lZHUudm4wggIiMA0GCSqG SIb3DQEBAQUAA4ICDwAwggIKAoICAQCvpzEMERmu064Mgw9a+poRcVOJgjbGrYW2 PqUh91HaZVWkGGIlCHoHCe+7mPWEuEO325rMrFVfQD8EODwFRg3AEvA5zjYyWQ31 o1QjiW2rH/TlY86lRwtgQeQ+AzTBylkPlQig47lXd3j3x09oZjk4J/QI+e5e4zdx mOe9bIQ7CzRyF1L7FyddosO2Mx2iHlpKc14NJ2s3kW5YMaBn/pqOM4+rh8B9WZop 9v//qv1zagpK7hG7/nn9gJmY7zsFZzAQfKhdA4aFr90YHPtddlWG+7sgPJq5jGjN Irzmf7/gG7lYTxOIElHyNAeqrDMLKW1QdXN5+IdO5CVuqDob+f5gWYos41oLItPo 1I+W/ujZ14nRF2tERjs/OsLXrjv9+xH/W53oqNjQHAbz7s9+SBE92S9LjjYjo+R2 UBoj7kY7jzJIlk3HqyPvHmY/W+TsslG8maLRMFo5H35EDWqPo1DvViNaxphPb19E aghpk6G62KSNKYv3PbchCU26IPSfI12xW5h7ubVtlJXerI+6n6iKyIJGTk1s7YOJ C7A5UjQ3yDA58/+IrnR4xnnelHyr5CDxd6r5abeU5r23sCvoHJP8eo2DbHdSVsPA 1n6BctdeXEVZg6LHWUraTtWzKyAleSVMgUMfSUXide8r7INO0dRV5z56+DWG48Jl 01Bc+Lfp2QIDAQABo4ICYzCCAl8wDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQG CCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBT+Fn09 71rLezm8AwqMn99jGdfT3TAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86js oTBvBggrBgEFBQcBAQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14 My5sZXRzZW5jcnlwdC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14 My5sZXRzZW5jcnlwdC5vcmcvMBgGA1UdEQQRMA+CDTNiMi5vdS5lZHUudm4wTAYD VR0gBEUwQzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYa aHR0cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcwggEFBgorBgEEAdZ5AgQCBIH2BIHz APEAdwBvU3asMfAxGdiZAKRRFf93FRwR2QLBACkGjbIImjfZEwAAAXDD2PILAAAE AwBIMEYCIQCjV8ja5GxuqwLFayqKNKaekg/q5VxK1TlBg6FckppiNQIhAKKk8QWT eoGUsP32WdF1fwExI1lnx1UUL7UO55XJmukEAHYAB7dcG+V9aP/xsMYdIxXHuuZX fFeUt2ruvGE6GmnTohwAAAFww9jyDwAABAMARzBFAiEA9Nh/g8tIc0afeqVhYsl6 quDchF6gCy5uRyb3aQDmcekCIBE8fp1joqoxdrG2cgOsv8h9rOfo7LoAimW23ZaU mC/5MA0GCSqGSIb3DQEBCwUAA4IBAQB4ExGEhaWuYcSLXNh3PhIkhGDhS8Z9YNVn RkOtF23EYpBpywHURvluAihThXXpPZzA0iEoQX0zYk1gPefLfBghcdIDRcOz5CRu zrOpOihlviNxljrYAbr9l5rLM1/SFA0nb3KqJAbS89qHEkMhaNW4CHLDSau/Fkly w9hTJH693pyDJuyx3TlYo38HM0EJYIoLAVZQkNCipVoAMK6IAqHfXktgsMiX4wHn zw3zr5zKXKjxP4dPgeJbWpQgyz6BB23SdHYaefGjQwPGXFweAim1c8TA9JJrN3NF joFg3M6j2ADb3WdBgb4m10yVoWT2O+hI43LY46leu0pDD83HgnBd -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAr6cxDBEZrtOuDIMPWvqa EXFTiYI2xq2Ftj6lIfdR2mVVpBhiJQh6Bwnvu5j1hLhDt9uazKxVX0A/BDg8BUYN wBLwOc42MlkN9aNUI4ltqx/05WPOpUcLYEHkPgM0wcpZD5UIoOO5V3d498dPaGY5 OCf0CPnuXuM3cZjnvWyEOws0chdS+xcnXaLDtjMdoh5aSnNeDSdrN5FuWDGgZ/6a jjOPq4fAfVmaKfb//6r9c2oKSu4Ru/55/YCZmO87BWcwEHyoXQOGha/dGBz7XXZV hvu7IDyauYxozSK85n+/4Bu5WE8TiBJR8jQHqqwzCyltUHVzefiHTuQlbqg6G/n+ YFmKLONaCyLT6NSPlv7o2deJ0RdrREY7PzrC1647/fsR/1ud6KjY0BwG8+7PfkgR PdkvS442I6PkdlAaI+5GO48ySJZNx6sj7x5mP1vk7LJRvJmi0TBaOR9+RA1qj6NQ 71YjWsaYT29fRGoIaZOhutikjSmL9z23IQlNuiD0nyNdsVuYe7m1bZSV3qyPup+o isiCRk5NbO2DiQuwOVI0N8gwOfP/iK50eMZ53pR8q+Qg8Xeq+Wm3lOa9t7Ar6ByT /HqNg2x3UlbDwNZ+gXLXXlxFWYOix1lK2k7VsysgJXklTIFDH0lF4nXvK+yDTtHU Vec+evg1huPCZdNQXPi36dkCAwEAAQ== -----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 405560980343632518158414651440410673426394 . . . . . . . . [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 2020-03-10 08:48:59 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-06-08 08:48:59 +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 '3b2.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 (4208 bits) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 716602095418737486715996193251916267880231490956817392622187483958756611604229174227245776005418837507672589200056289811162913722065297411182256247925513889621587308312465968150752723612210607055587146304325997772301033913157298490400967355851097707940906092243857052332718930748578766587486035868560152032161810034741649425509094766055428799626396942991704073881946474256875509441940294665909010930151028644136607474546956889695633887883265018807453939592856263192100712058806777383443454940863989904705861736359888572167218639405393583172979630857283664852610064515027626502616185377837393382012576007084200396089319576591849965017233099762939793122294158647000754293201842739763405532920312262506470813263422173194193860735619377277590315552933241782452228330145607286135886965838759902549575003124429805693260006199379800374875543136111800778714186179542194515864735359651909274248219237501484299466187675211446759975627133087356130124778038058744307105946490066993505496619811947998200158236292998237106277079793008577146376591674236141434140579500023738317029889837687360337324470355692587589414264684414660438598359360725756511179950636146330391250684663567766352457158153572955903698967396855757687807577511117772988412848601 . . . . . . . . . . . . . . . . . . . . [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) fe167d3def5acb7b39bc030a8c9fdf6319d7d3dd . . . . . . . . . . . . . . . . [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 (17 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '3b2.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 (246 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes) 00f10077006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d91300000170c3d8f20b0000040300483046022100a357c8dae46c6eab02c56b2a8a34a69e920feae55c4ad5394183a15c929a6235022100a2a4f105937a8194b0fdf659d1757f0131235967c755142fb50ee795c99ae90400760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c00000170c3d8f20f0000040300473045022100f4d87f83cb4873469f7aa56162c97aaae0dc845ea00b2e6e4726f76900e671e90220113c7e9d63a2aa3176b1b67203acbfc87dace7e8ecba008a65b6dd9694982ff9 . . . . [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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