cntt.blu.edu.vn
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:47:11:95:2e:5c:c1:21:9a:56:ef:74:e9:c8:21:07:be:e6 was issued on by Let's Encrypt.
With 5 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=cntt.blu.edu.vn
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:47:11:95:2e:5c:c1:21:9a:56:ef:74:e9:c8:21:07:be:e6Serial Number (int): 285520277315167240054512149865820104146662
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: da:a9:25:cc:cd:5b:4e:08:c6:7c:f5:d8:48:a1:72:92:14:d8:a3:7f
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 94:92:aa:b2:03:04:eb:64:f7:51:90:fe:4e:9e:71:3e:0f:2e:6c:8e
Fingerprint (sha256): 4e:15:d3:37:22:f0:0b:d6:61:b1:32:40:cf:6a:7a:cc:32:0f:46:fa:74:7a:11:14:38:18:f1:b0:88:60:48:53
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate cntt.blu.edu.vn
5
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for cntt.blu.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
bmllct.blu.edu.vn
chvhnt.blu.edu.vn
cntt.blu.edu.vn
pdaotao.blu.edu.vn
tktkdclgd.blu.edu.vn
chvhnt.blu.edu.vn
cntt.blu.edu.vn
pdaotao.blu.edu.vn
tktkdclgd.blu.edu.vn
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Certificate
The complete raw certificate details for cntt.blu.edu.vn in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFpTCCBI2gAwIBAgISA0cRlS5cwSGaVu906cghB77mMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTEyMDExNjUxMDRaFw0y MDAyMjkxNjUxMDRaMBoxGDAWBgNVBAMTD2NudHQuYmx1LmVkdS52bjCCASIwDQYJ KoZIhvcNAQEBBQADggEPADCCAQoCggEBAMkD5nhlgdFa1cVRGRagncWmkiyR2Zrs kGmI2BpJyfSWZntAlUObihdK1u+4nvzLhKkqL82hOK4f8bn+hXl71tfdMDAmRsbt a36nVTPe3HMg8/8PnxT0BETlVFk7XZeTf6w/4ht9TEywNnYs7JtFDXCYARGnDuKm lyFTBKgSw1n1vWXs6wgVn6MMVOPzFuOrOw37PkvC4hS/DO2612DITsP8PaHW5AEt Vd96Iw3Le1ao2MbCtiJhTR9hUKKHO/0Om/ysjG84A7Ls5J7pS/WrqBimqJ8EuNZZ +kCtmKUgegQFNxV9uJNu2wdo+59+CY092JfpMLnD1IB+VqG2TbOZI1UCAwEAAaOC ArMwggKvMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYB BQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQU2qklzM1bTgjGfPXYSKFykhTY o38wHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo7KEwbwYIKwYBBQUHAQEE YzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMubGV0c2VuY3J5cHQu b3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMubGV0c2VuY3J5cHQu b3JnLzBqBgNVHREEYzBhghFibWxsY3QuYmx1LmVkdS52boIRY2h2aG50LmJsdS5l ZHUudm6CD2NudHQuYmx1LmVkdS52boIScGRhb3Rhby5ibHUuZWR1LnZughR0a3Rr ZGNsZ2QuYmx1LmVkdS52bjBMBgNVHSAERTBDMAgGBmeBDAECATA3BgsrBgEEAYLf EwEBATAoMCYGCCsGAQUFBwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCC AQMGCisGAQQB1nkCBAIEgfQEgfEA7wB1AAe3XBvlfWj/8bDGHSMVx7rmV3xXlLdq 7rxhOhpp06IcAAABbsKWXVYAAAQDAEYwRAIgaOpBkewhAjSHVkNzYU8TVkx+U4OI gPgiNQ2kRd8DqZACIBnIM3Kty9kgvLGrxg/tTD+1gJcc1uWyDPgI9qMgTkXhAHYA b1N2rDHwMRnYmQCkURX/dxUcEdkCwQApBo2yCJo32RMAAAFuwpZdawAABAMARzBF AiA8PRNdfnN9BMgG1zvy+RybSa+YXnR6yQimmF423E000gIhAIGBHPVwFNCWDTmQ Er0Urxm3+v0L9arC8wCtphW/e0YsMA0GCSqGSIb3DQEBCwUAA4IBAQCTDOqZ1vCQ AHPAa7MFQgrFRFa3l0ry5J4TvLrkKPNu8nKhGlLEcM76+VhvtQMbcGOMUlnE909L Nw81ONIAZNGjoCyKahH+ZILRQMl3+atjH5ijZX9y6fo3M+fNJHYUUOn9ct/JSoBM y/oQP2WnF+8dszWhFrx2co/JgzC9cj2C7sgPgmU6Y0dZNKZ1G8fVT0Wnn6hlXBXy YYihbkbM13eFvzP8+Zw5CqvOl/2OdTQZNPL3vVgdQ+Ef0q4b9UMAkTR/AdQItOtT Z2c0Zji1SNK0AzTgstSqkGqnReaueZvTBnm4kF9Auoeltum+5qe3g5gfGn+yFMk1 pZyLVXZbezSf -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyQPmeGWB0VrVxVEZFqCd xaaSLJHZmuyQaYjYGknJ9JZme0CVQ5uKF0rW77ie/MuEqSovzaE4rh/xuf6FeXvW 190wMCZGxu1rfqdVM97ccyDz/w+fFPQEROVUWTtdl5N/rD/iG31MTLA2dizsm0UN cJgBEacO4qaXIVMEqBLDWfW9ZezrCBWfowxU4/MW46s7Dfs+S8LiFL8M7brXYMhO w/w9odbkAS1V33ojDct7VqjYxsK2ImFNH2FQooc7/Q6b/KyMbzgDsuzknulL9auo GKaonwS41ln6QK2YpSB6BAU3FX24k27bB2j7n34JjT3Yl+kwucPUgH5WobZNs5kj VQIDAQAB -----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 285520277315167240054512149865820104146662 . . . . . . . . [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 2019-12-01 16:51:04 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-02-29 16:51:04 +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 'cntt.blu.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 25375822595267763992256541973657353512457352381395963232638049608153327455016963209303761397015637272797995725814511990553445920960556990491129216103783357264858828019412802993391036352583336093218280954029833670457009918431716695763260490446697649837848161528170936691817980872833164389029496236600281522985139142836497437264905871444052762824025289899865076009701385265628629205401948531884234983036079875580799766414622211303434845912497263690993891986095395596842423295314920478123053582504430174750000533045400881769707168157427361696368591813829459188966543457969121361214056326713622069805316145560658011300693 . . . . . . . . . . . . . . . . . . . . [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) daa925cccd5b4e08c67cf5d848a1729214d8a37f . . . . . . . . . . . . . . . . [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 (99 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'bmllct.blu.edu.vn' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'chvhnt.blu.edu.vn' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cntt.blu.edu.vn' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'pdaotao.blu.edu.vn' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'tktkdclgd.blu.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) 00ef00750007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016ec2965d560000040300463044022068ea4191ec21023487564373614f13564c7e53838880f822350da445df03a990022019c83372adcbd920bcb1abc60fed4c3fb580971cd6e5b20cf808f6a3204e45e10076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016ec2965d6b000004030047304502203c3d135d7e737d04c806d73bf2f91c9b49af985e747ac908a6985e36dc4d34d202210081811cf57014d0960d399012bd14af19b7fafd0bf5aac2f300ada615bf7b462c . . . . [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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