hebesec.com
Issued by R3
About this certificate
This digital certificate with serial number 03:a3:97:a9:19:fd:a9:c0:ad:c0:65:99:d6:b7:67:d9:89:93 was issued on by Let's Encrypt.
With 2 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:
- 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=hebesec.com
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:a3:97:a9:19:fd:a9:c0:ad:c0:65:99:d6:b7:67:d9:89:93Serial Number (int): 317004475056083825275415764891575441262995
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 6a:13:3c:a4:50:31:fe:a9:38:6c:46:1d:e0:e9:65:96:a9:38:65:b0
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): 21:e7:17:f4:19:66:7c:44:4d:7c:95:86:97:78:20:6b:80:6d:21:11
Fingerprint (sha256): 8e:91:cd:d9:cf:40:06:19:5c:7c:9f:f9:82:91:d3:e6:17:bd:9e:6f:79:33:ee:1a:40:79:45:b4:80:4d:5d:3e
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate hebesec.com
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for hebesec.com
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
hebesec.com
www.hebesec.com
www.hebesec.com
Other certificates including the domain name hebesec.com
(limited to 100 certificates)
mail.saltorocoffee.com
mail.saisnehfinancial.com
mail.pandagis.com
mail.hebesec.com
mail.pandagis.com
mail.jasbuze.xyz
mail.camkb.com
mail.saltorocoffee.com
mail.hebesec.com
mail.pandagis.com
mail.hebesec.com
vrgmail.vrgdesignden.com
mail.jasbuze.xyz
mail.camkb.com
mail.jasbuze.xyz
hebesec.com
mail.camkb.com
mail.rishabhwealth.com
mail.saisnehfinancial.com
mail.jasbuze.xyz
vrgmail.vrgdesignden.com
vrgmail.vrgdesignden.com
vrgmail.vrgdesignden.com
mail.pandagis.com
mail.saltorocoffee.com
mail.hebesec.com
mail.saisnehfinancial.com
mail.saisnehfinancial.com
mail.camkb.com
mail.saltorocoffee.com
mail.rishabhwealth.com
mail.saisnehfinancial.com
mail.pandagis.com
mail.hebesec.com
mail.pandagis.com
mail.jasbuze.xyz
mail.camkb.com
mail.saltorocoffee.com
mail.hebesec.com
mail.pandagis.com
mail.hebesec.com
vrgmail.vrgdesignden.com
mail.jasbuze.xyz
mail.camkb.com
mail.jasbuze.xyz
hebesec.com
mail.camkb.com
mail.rishabhwealth.com
mail.saisnehfinancial.com
mail.jasbuze.xyz
vrgmail.vrgdesignden.com
vrgmail.vrgdesignden.com
vrgmail.vrgdesignden.com
mail.pandagis.com
mail.saltorocoffee.com
mail.hebesec.com
mail.saisnehfinancial.com
mail.saisnehfinancial.com
mail.camkb.com
mail.saltorocoffee.com
mail.rishabhwealth.com
Certificate
The complete raw certificate details for hebesec.com in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIF8jCCBNqgAwIBAgISA6OXqRn9qcCtwGWZ1rdn2YmTMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yNDAyMDExMjE0MzFaFw0yNDA1MDExMjE0MzBaMBYxFDASBgNVBAMT C2hlYmVzZWMuY29tMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAofLG 8YB5gjoDXXz0GoavBn5sy6BYDLP8S7S4BMvfga1IDSdLTAcaCZh+mSPGO2m9rz1O 2oNAvOawiExxJJHQrAOz2OMlv5a9o4kGcfC3ABLRr+1lscgsfJOhHxO+STJiloeX BhFVUdWb32JluVY4Ug81hK0NYrQpHkgwlzrwlhBSKwf8sj5IFYZ3eetLg8JaIIVr WbZRUBtNtuQJFOCUu8HEmHa16q0JiI+SY+l/lRAO4jXFrq5xfahXg28bibiCQJsb bQhNU4hapyOTxj3pDm9UhXiay30kl+jREOBtSFa5SWNb5oZ93NWdA0fiK2nSRm9n D5S+2MUzKUv2dPeoO1Af6Io/chYYMBDhflL+o1abg6IVJuQHX9Dq6ULnW2NqWIj5 F5ZJanu4C3SZCM+DzQUaGPTx00+wdDI5xt/u5lf5FuqTTf0VOdxAxWilu4K4liJl n5rKkRqP6CClkOrPFQHIrUj2sPbBPLGPXzjnERHYuNQWrGOSXI5csDm30Y2rMuWg wu5XUId7cD4HfoKSUqecwOkTdZ4NPpuq3hV0K93VHloGjbRBlxS/k3L0D9JoH5Zb 7C4osMaxdE4QhI94JhtmxHpfDYJxKp8WcpyiAtQwuY9V7NBLR/FRhXklUGs/QDJi 2vqn3USrQJwBe5161rpSVvVoVD1Ayneb1qHq/aECAwEAAaOCAhwwggIYMA4GA1Ud DwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0T AQH/BAIwADAdBgNVHQ4EFgQUahM8pFAx/qk4bEYd4Olllqk4ZbAwHwYDVR0jBBgw FoAUFC6zF7dYVsuuUAlA5h+vnYsUwsYwVQYIKwYBBQUHAQEESTBHMCEGCCsGAQUF BzABhhVodHRwOi8vcjMuby5sZW5jci5vcmcwIgYIKwYBBQUHMAKGFmh0dHA6Ly9y My5pLmxlbmNyLm9yZy8wJwYDVR0RBCAwHoILaGViZXNlYy5jb22CD3d3dy5oZWJl c2VjLmNvbTATBgNVHSAEDDAKMAgGBmeBDAECATCCAQIGCisGAQQB1nkCBAIEgfME gfAA7gB1AEiw42vapkc0D+VqAvqdMOscUgHLVt0sgdm7v6s52IRzAAABjWTOgEcA AAQDAEYwRAIgOpTa6JnqjkJMlJmKUW6hVw9zBWd+Ubn15nXVXeN26jQCIC+rk1bP MqAXXbdE1xsbRNVNxBHgByekuF9i/mAz4/6bAHUA7s3QZNXbGs7FXLedtM0TojKH Rny87N7DUUhZRnEftZsAAAGNZM6ASQAABAMARjBEAiBljEw7WdToBdYzXaSmCJhr 7hJ6DvUcQquZsAFt01ObcQIgVqSiYoM7Gu9ick/8beRTq+4kmOSZQ8phMd9Mtg4g OJcwDQYJKoZIhvcNAQELBQADggEBAGZlex3gIktMI6NmdaBLkT/kDhOGTD6k/MkF VAxmyY2JQ3IkvDjGGGG0JU2DKU2b5xqcOAuNhrxpAWvi12VxlCs96xWhkwI7tot9 uAXSjuekF25Z4sz17Sq/OlatcJlh9YQiVSUtaoYNwQ0RLpYExBfNLEYKdljrKccX b4VBoQG2y80xarKdAhgbZpNhk2rDSD66cqaR4WOqRWSliQR68IoSizDLIfDMGMCj Bqqkxdw4taoEnWfHv8y8JclADArLLmdSfI8CinluHxdPfbomMZgLcA10SFdf+5qs /MdzqVNOgKWyBwG+V9OYSAUUxKo5I4z9Xe8u83fy7/CR9q3VP30= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAofLG8YB5gjoDXXz0Goav Bn5sy6BYDLP8S7S4BMvfga1IDSdLTAcaCZh+mSPGO2m9rz1O2oNAvOawiExxJJHQ rAOz2OMlv5a9o4kGcfC3ABLRr+1lscgsfJOhHxO+STJiloeXBhFVUdWb32JluVY4 Ug81hK0NYrQpHkgwlzrwlhBSKwf8sj5IFYZ3eetLg8JaIIVrWbZRUBtNtuQJFOCU u8HEmHa16q0JiI+SY+l/lRAO4jXFrq5xfahXg28bibiCQJsbbQhNU4hapyOTxj3p Dm9UhXiay30kl+jREOBtSFa5SWNb5oZ93NWdA0fiK2nSRm9nD5S+2MUzKUv2dPeo O1Af6Io/chYYMBDhflL+o1abg6IVJuQHX9Dq6ULnW2NqWIj5F5ZJanu4C3SZCM+D zQUaGPTx00+wdDI5xt/u5lf5FuqTTf0VOdxAxWilu4K4liJln5rKkRqP6CClkOrP FQHIrUj2sPbBPLGPXzjnERHYuNQWrGOSXI5csDm30Y2rMuWgwu5XUId7cD4HfoKS UqecwOkTdZ4NPpuq3hV0K93VHloGjbRBlxS/k3L0D9JoH5Zb7C4osMaxdE4QhI94 JhtmxHpfDYJxKp8WcpyiAtQwuY9V7NBLR/FRhXklUGs/QDJi2vqn3USrQJwBe516 1rpSVvVoVD1Ayneb1qHq/aECAwEAAQ== -----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 317004475056083825275415764891575441262995 . . . . . . . . [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 2024-02-01 12:14:31 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-05-01 12:14:30 +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 'hebesec.com' . . . . . . . . [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 660691617794066918782646746039416006381630402473435271593363065467108808032029302808017978193403666440248233264992800287442097371857848857884914552842286254776898548742376372703533091137485233421361155820936888789442642681492534497987020692217448950677580744928762087236057529225582546885259931270475159600253786583708937836018663020533699753410645619205904863403704691850849843928097070430759042021210145693276970632697404278808823042645635739850877284327444562977375537930754050335964459968323882482267343004418374501800287196674519630149249274197479503921184120105859009863645230878689305826720175949651140198311916698583914048204434942594190191825286735823100953617909365389442633049085858618204934250734395240636216295413051880837275192116934426659167070334105323849201552210180503928223930876806639983172470058705453904052531459874475087352361685786103852721224426730706812635418973637506101880709719422301414593591719216526033791495122269324871562003085359365610768079427719671695421346415195460747478887927245855838439500419060866790461957583608282066722255006063181835414768950343676880397947623837658893879324602018929914386871650456702192435559481724435249233615861280159459347980469462381656396470393695676627730335202721 . . . . . . . . . . . . . . . . . . . . [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) 6a133ca45031fea9386c461de0e96596a93865b0 . . . . . . . . . . . . . . . . [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 (32 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'hebesec.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.hebesec.com' . . . . . . . . . . . . . . . . [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) 00ee00750048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018d64ce8047000004030046304402203a94dae899ea8e424c94998a516ea1570f7305677e51b9f5e675d55de376ea3402202fab9356cf32a0175db744d71b1b44d54dc411e00727a4b85f62fe6033e3fe9b007500eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018d64ce804900000403004630440220658c4c3b59d4e805d6335da4a608986bee127a0ef51c42ab99b0016dd3539b71022056a4a262833b1aef62724ffc6de453abee2498e49943ca6131df4cb60e203897 . . . . [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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