www.k-12.at

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:d8:36:43:46:e8:fc:82:2d:37:6b:11:ca:b0:b2:a0:98:e6 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=www.k-12.at

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:d8:36:43:46:e8:fc:82:2d:37:6b:11:ca:b0:b2:a0:98:e6
Serial Number (int): 422022262615853355540458993020707903936742
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 7f:51:20:9a:9b:6f:0f:50:af:bf:02:07:68:4c:fc:4a:d5:3e:fc:71
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 43:29:95:04:28:0c:3a:a3:3f:cf:17:ea:56:ad:c5:30:20:e8:fb:69
Fingerprint (sha256): 21:e9:58:f3:de:6a:c6:25:e0:59:93:4d:44:3f:5a:6d:f3:f8:05:12:36:be:8a:37:24:49:15:63:d4:f4:bb:0e

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 www.k-12.at

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.k-12.at

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

www.k-12.at

Other certificates including the domain name k-12.at

(limited to 100 certificates)
www.k-12.at
www.k-12.at
www.k-12.at
www.k-12.at
www.k-12.at
www.k-12.at
www.k-12.at
k-12.at
www.k-12.at
www.k-12.at
k-12.at
www.k-12.at
www.k-12.at
k-12.at
www.k-12.at
www.k-12.at
www.k-12.at
www.k-12.at

Certificate

The complete raw certificate details for www.k-12.at in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIFTzCCBDegAwIBAgISBNg2Q0bo/IItN2sRyrCyoJjmMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODEyMjUxNDU0NDlaFw0x
OTAzMjUxNDU0NDlaMBYxFDASBgNVBAMTC3d3dy5rLTEyLmF0MIIBIjANBgkqhkiG
9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3oM7vba2vEXiwcXS7Hrn7u+PapXPYoLT4t5W
90Mkv5hhJMqghEaZCUgLWPRuwgmbY/yvNtipuwWTN6jQ9VbXRGxpT9zzgroMPz5a
EFMWR4E7h1u95CMwjP6GIUYiF2sXKYpzMRGpcMXjLxes2nAQAIZfuNFZh9jjKlaV
Ag9x6ffwLvzgmUh0thlaxdFHJ8n3fKF4La8/CgyE0R7tzt7J82HuCUB6alNh7Az0
snhEU8DLreXIgOz1WSXF7kr6QdK0hsP2+ymBeeGwwlTNpydw0mGDpPo8n62lkKpT
U9Tw8Mfj7u+JSqv+52VOn1MhkKFlgzkf+cfJBI0oyrwq0MdFbQIDAQABo4ICYTCC
Al0wDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcD
AjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBR/USCam28PUK+/AgdoTPxK1T78cTAf
BgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86jsoTBvBggrBgEFBQcBAQRjMGEw
LgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14My5sZXRzZW5jcnlwdC5vcmcw
LwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5sZXRzZW5jcnlwdC5vcmcv
MBYGA1UdEQQPMA2CC3d3dy5rLTEyLmF0MEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcG
CysGAQQBgt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5
cHQub3JnMIIBBQYKKwYBBAHWeQIEAgSB9gSB8wDxAHcAdH7agzGtMxCRIZzOJU9C
cMK//V5CIAjGNzV55hB7zFYAAAFn5hNiFwAABAMASDBGAiEAjjp9fTi322yHjSxO
C8aQkgMSLDX50/Yq3niDyeEBHgcCIQDszc0B59AmMgfmi/wwzPERojyoZQfE5xVE
IPVuxjVmDQB2ACk8UZZUyDlluqpQ/FgH1Ldvv1h6KXLcpMMM9OVFR/R4AAABZ+YT
Y/EAAAQDAEcwRQIgSAlgDwE4rzRQIvXrGiB7nu8d16tZLQTEUvz6+oAyw/0CIQD+
jREQrZUKiAW+YUT6MK+k//W96Wc6wzsS/ZmC744rgjANBgkqhkiG9w0BAQsFAAOC
AQEAXB3Ld8zFSuE4jcwsAWwSocqKSFC4YAgY8XyCBAtRnRfAtPPKEJ/udwt80ybF
w880XUwtwXtESAErkkOq9ZZtkwy3LH3ob4rDTr6LC8Zqi/qqe3yCyATmD9JOJIPo
D6Ap//wutZZGFHSMnUodYCfvfvtAOeSyZdY85SNrLh8rBfGYPcni9tjfalcDmu1I
q89l9x7RTLscEr+Pl+0d8Hmv4U6gGeaEhpsoCRIqKAXyQbbL2D/+djm/hzzioseD
Ec5HAcqHFn0j7Dr1JsFMFUUTRn9bWh4URhSAFCBIAUYEK7vpVfEy1CbmH6xSa5/P
XT5m70FF96+X+055uPyWAuOcqA==
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3oM7vba2vEXiwcXS7Hrn
7u+PapXPYoLT4t5W90Mkv5hhJMqghEaZCUgLWPRuwgmbY/yvNtipuwWTN6jQ9VbX
RGxpT9zzgroMPz5aEFMWR4E7h1u95CMwjP6GIUYiF2sXKYpzMRGpcMXjLxes2nAQ
AIZfuNFZh9jjKlaVAg9x6ffwLvzgmUh0thlaxdFHJ8n3fKF4La8/CgyE0R7tzt7J
82HuCUB6alNh7Az0snhEU8DLreXIgOz1WSXF7kr6QdK0hsP2+ymBeeGwwlTNpydw
0mGDpPo8n62lkKpTU9Tw8Mfj7u+JSqv+52VOn1MhkKFlgzkf+cfJBI0oyrwq0MdF
bQIDAQAB
-----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 422022262615853355540458993020707903936742
 . . . . . . . . [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 2018-12-25 14:54:49 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-03-25 14:54:49 +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 'www.k-12.at'
 . . . . . . . . [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 28089617285940655739837402076337430667886269865110793134556175250066480789269230052938361473978765045489775595268270707843840337308913109508726682477427515895273911870017259423766263574184035365057774280554483170846362838659708044565568807328442378582801424565158094489191860994478307502407840921669131172222201724974824520084190767153500858589857440349275801203126861567727415980834108445051890350899780858133662672034903013263587915811304232100117882747530356413204861593754020073447487253240694411433688085759118428056124659489681945837104587061036957923002059237114356823253099043185278341845042494337403641611629
 . . . . . . . . . . . . . . . . . . . . [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)
							7f51209a9b6f0f50afbf0207684cfc4ad53efc71
 . . . . . . . . . . . . . . . . [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 (15 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.k-12.at'
 . . . . . . . . . . . . . . . . [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)
							00f1007700747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc5600000167e613621700000403004830460221008e3a7d7d38b7db6c878d2c4e0bc6909203122c35f9d3f62ade7883c9e1011e07022100eccdcd01e7d0263207e68bfc30ccf111a23ca86507c4e7154420f56ec635660d007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f47800000167e61363f1000004030047304502204809600f0138af345022f5eb1a207b9eef1dd7ab592d04c452fcfafa8032c3fd022100fe8d1110ad950a8805be6144fa30afa4fff5bde9673ac33b12fd9982ef8e2b82
 . . . . [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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