kt-formation.fr
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:88:9c:6f:dc:55:5f:a4:d3:b8:99:a2:a8:6c:b9:60:60:a6 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:
- Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)
Certificate Subject
CN=kt-formation.fr
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:88:9c:6f:dc:55:5f:a4:d3:b8:99:a2:a8:6c:b9:60:60:a6Serial Number (int): 307823200077716222169602411840451412779174
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 29:bf:25:49:2e:59:02:2d:a4:83:fa:d5:be:1f:17:f8:3a:99:0c:60
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 8c:fe:77:24:bb:52:0d:61:5b:6f:bb:c8:6b:e3:32:22:e6:22:36:7f
Fingerprint (sha256): bf:9e:92:8f:f5:c5:33:ee:ec:44:f1:4b:08:7c:e1:10:5c:29:82:fc:a4:f1:11:1b:e2:65:b2:3a:1b:dc:6e:2b
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.org/Check the revocation status for certificate kt-formation.fr
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for kt-formation.fr
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
8 extensions
No
unhandled critical extensions
CA Certificate
This is not a CA certificate
Subject Alternative Names
kt-formation.fr
www.kt-formation.fr
www.kt-formation.fr
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Certificate
The complete raw certificate details for kt-formation.fr in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGFzCCBP+gAwIBAgISA4icb9xVX6TTuJmiqGy5YGCmMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xNjEwMDUwNzMzMDBaFw0x NzAxMDMwNzMzMDBaMBoxGDAWBgNVBAMTD2t0LWZvcm1hdGlvbi5mcjCCAiIwDQYJ KoZIhvcNAQEBBQADggIPADCCAgoCggIBALMVHKXUCtjFKQz/OTf8hVTvaCsLBJC8 Fwiy3XMnhCRDyzzpPrPR4kM0ohIN/2KNjlxTYYGBnobp6gryXBtjP81f8EVhAg3t Ok0DrLhb1o/tHaqr1e0RE0msqBFw+D6eD4g33B+VSnAvoVXKVaqgISVUTXtjd/Rh ZGRW3LgkkSdDi10pXbjxV/U/O3W2cHZZKKpLe1nwh7qwsYl6VVj1WhCJruXb2UIU WSajSyvF98JuOkgMiFwT560nikzH/uwxCYXAdKajftM6zgy9y9QlMzyHFoBiavIk VzjwQNb4eEHT2Ol7vmIJiJ0BbwcSjhXDaGjw9GEUFkw9jdtqbH88tSnfsmE8WCq6 u/nZDCQOiO442jngo90sKQBwOc6bCVazo6HYHGfc5nCONOemg9Uf24S1IFKTl0Yf TX2FAEAckNblgpi0M0nzrYSUzFTMxtfpeBbh1uPIYJv8rm3zOQrDLiUtnIu9L2F6 F40E3sLpSI+JRLc9yVeu8ex7gS2fJWkxyI+H+XxxHbsFMIRo3/TZdjnvcb2jg9CE DJ1ghuC1yel20YYaOyZVlGsXQxGBtbK8uDmclef6jiR64TIiccASd5em5gc8lJ3P QLhLpVSvOaFXgCXn922M/VjrxxFaSSg6VPS2jWF+qH8O5WHaGXU9qp2At9hmoLWq K6VNKADlhZ2NAgMBAAGjggIlMIICITAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYw FAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFCm/ JUkuWQItpIP61b4fF/g6mQxgMB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/z qOyhMHAGCCsGAQUFBwEBBGQwYjAvBggrBgEFBQcwAYYjaHR0cDovL29jc3AuaW50 LXgzLmxldHNlbmNyeXB0Lm9yZy8wLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0Lmlu dC14My5sZXRzZW5jcnlwdC5vcmcvMC8GA1UdEQQoMCaCD2t0LWZvcm1hdGlvbi5m coITd3d3Lmt0LWZvcm1hdGlvbi5mcjCB/gYDVR0gBIH2MIHzMAgGBmeBDAECATCB 5gYLKwYBBAGC3xMBAQEwgdYwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2Vu Y3J5cHQub3JnMIGrBggrBgEFBQcCAjCBngyBm1RoaXMgQ2VydGlmaWNhdGUgbWF5 IG9ubHkgYmUgcmVsaWVkIHVwb24gYnkgUmVseWluZyBQYXJ0aWVzIGFuZCBvbmx5 IGluIGFjY29yZGFuY2Ugd2l0aCB0aGUgQ2VydGlmaWNhdGUgUG9saWN5IGZvdW5k IGF0IGh0dHBzOi8vbGV0c2VuY3J5cHQub3JnL3JlcG9zaXRvcnkvMA0GCSqGSIb3 DQEBCwUAA4IBAQBsr0AA8aOO1UCV0TupBjUE+zhGabbWQwppLUcxN9n8/8aIQc4J RucjOltuvZpfN3wOCUdMcgot7z2UBPT+Q8XKdvgr8mL3qo7qHBB4D7CMP26GqlX1 kqOaHLKfLJov5x8fxL5qnTe/uFFh+fwEJywzlbjHrvIpyJFzHYw4Z+FydvB9w+4K uSZyXcZRr3V4k3TRmkN56A0ZN7ypMhXakEdQIj6BQo4884XQClKbXN7T/1k4E+YO sRspzCyf0TijKvhVyhQVjf4k2qgPoPHUmCCPPSWMrrwMM7R6aE11qB7PVknEdCfs E+StJvbdyjsnMZADyBp7hDZ9hcjZyNN+BIrx -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAsxUcpdQK2MUpDP85N/yF VO9oKwsEkLwXCLLdcyeEJEPLPOk+s9HiQzSiEg3/Yo2OXFNhgYGehunqCvJcG2M/ zV/wRWECDe06TQOsuFvWj+0dqqvV7RETSayoEXD4Pp4PiDfcH5VKcC+hVcpVqqAh JVRNe2N39GFkZFbcuCSRJ0OLXSlduPFX9T87dbZwdlkoqkt7WfCHurCxiXpVWPVa EImu5dvZQhRZJqNLK8X3wm46SAyIXBPnrSeKTMf+7DEJhcB0pqN+0zrODL3L1CUz PIcWgGJq8iRXOPBA1vh4QdPY6Xu+YgmInQFvBxKOFcNoaPD0YRQWTD2N22psfzy1 Kd+yYTxYKrq7+dkMJA6I7jjaOeCj3SwpAHA5zpsJVrOjodgcZ9zmcI4056aD1R/b hLUgUpOXRh9NfYUAQByQ1uWCmLQzSfOthJTMVMzG1+l4FuHW48hgm/yubfM5CsMu JS2ci70vYXoXjQTewulIj4lEtz3JV67x7HuBLZ8laTHIj4f5fHEduwUwhGjf9Nl2 Oe9xvaOD0IQMnWCG4LXJ6XbRhho7JlWUaxdDEYG1sry4OZyV5/qOJHrhMiJxwBJ3 l6bmBzyUnc9AuEulVK85oVeAJef3bYz9WOvHEVpJKDpU9LaNYX6ofw7lYdoZdT2q nYC32GagtaorpU0oAOWFnY0CAwEAAQ== -----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 307823200077716222169602411840451412779174 . . . . . . . . [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 2016-10-05 07:33:00 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2017-01-03 07:33:00 +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 'kt-formation.fr' . . . . . . . . [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 730592729813807682878643879084920627120622988987150581968119203791401606874924346638896964651408293667709555055236975499724514877582403684351054467191947353379250773314860183669445906398719853117460425160938594584145692234538503499546629237829395191459021736545837637110254807439544242223022734683945957335738830554604541502536512986270035700579824753665218584200256391698277403177457882576431318533816641815894231627046971614397330629357365875847486594634245033293879578863747875406611256918713981804868767167906191422121803857416408803246666940787619910917719717932353837077299841807267606605783018106272112449214326469344981799439366315705387067570872190004810749207215933893451951687308082878158933722288351692335982491832922888232072973769181465934920142796218958494708205095523425798449026350240830789451766734308981956165506518429000718397288422078908973430078067450920955206238530636393151298001981276987563050983413317825066166924608829915158529349938889810938887800206883026897716263324089055799401541566737441536648336729163619921183067885366209091091060842869098321513082275167948271775419158783259157157546342605032360744523339670027282662815806161902632225916496224235244238805170289275378099681762810355304129228021133 . . . . . . . . . . . . . . . . . . . . [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) 29bf25492e59022da483fad5be1f17f83a990c60 . . . . . . . . . . . . . . . . [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 (100 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 (40 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'kt-formation.fr' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.kt-formation.fr' . . . . . . . . . . . . . . . . [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 (246 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 1.3.6.1.5.5.7.2.2 (unotice) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String 'This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/' . . . . [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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