lurgrotte.at

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:28:00:77:ce:6b:0b:af:dc:bc:13:84:f4:ad:df:2b:9d:af 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=lurgrotte.at

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:28:00:77:ce:6b:0b:af:dc:bc:13:84:f4:ad:df:2b:9d:af
Serial Number (int): 274948774542101852803681357380627005676975
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: ed:07:98:15:a9:5d:d6:91:da:31:0f:bd:ea:7d:85:4f:4b:7b:59:15
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 8d:e6:7a:b1:05:d3:ff:1b:36:7a:6f:2f:51:c2:f1:6b:bb:6a:44:b6
Fingerprint (sha256): 39:d1:66:04:9d:d5:20:e8:f2:56:30:24:ac:ca:fd:34:e7:f1:83:b2:68:35:53:a9:b8:a3:a9:0e:13:a3:5e:7b

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 lurgrotte.at

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for lurgrotte.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

lurgrotte.at
www.lurgrotte.at

Other certificates including the domain name lurgrotte.at

(limited to 100 certificates)
*.cryppt.de
lurgrotte.at
lurgrotte.at
www.lurgrotte.at
lurgrotte.at
lurgrotte.at
lurgrotte.at
lurgrotte.at
www.lurgrotte.at
www.lurgrotte.at
lurgrotte.at
lurgrotte.at
lurgrotte.at
lurgrotte.at
lurgrotte.at
www.lurgrotte.at
lurgrotte.at
www.mein-wunschname.lima.zone
www.vavik96.4lima.de
lurgrotte.at
www.lurgrotte.at

Certificate

The complete raw certificate details for lurgrotte.at in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwPt/lWAUiwBcSBPeL4AF
IaVyOa1msVF/++0JMPcFuGpK1n7Z9H4soASkMJ9DNLi8xdKlpUMl3FEqBUV5/Pkt
/fyofrlvWJvj44xy2XhRXJt9UvihMtl3d2wlm19R/+6fFULNYoOrLLx0LeMskDcm
URumiqUp0AcUliAsxEtTDbzRBddGhN+PtmwfsnHmz8rgxX/5sJgL25SlMmTaVyYr
5ev4OYpBFnhDCP8bNRR+C/8KRmXM1+JuFpa+Tph3rMbMdWJu+H9bCMRayqRxcHez
7y46hSv7bSPQiaUoq4bqJo4VLYquca7ur0LvO8lKfl8yz8Vok86FagdrL85PSZee
WQIDAQAB
-----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 274948774542101852803681357380627005676975
 . . . . . . . . [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 2018-05-04 02:03:37 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-08-02 02:03:37 +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 'lurgrotte.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 24361773023459179470441007086589166066738960882538479337563879523186421329869975743643056400429455742738639127228156351785725784529022839141434036253204084764053761752115413320673916251576132051110622311320206905354913835075936197707060394157539219091200154825339264258546545765493394477052561065525976016972676679628878450602339029841406120701214139973593066508247887802317435576980079500784320719826119333516467656913169258140749278959152283014244294888234326940956270099023485256938585463484247625068442302260027603862996285094266820501588535163118435276663041044724224054010027330274030057216242113313669807316569
 . . . . . . . . . . . . . . . . . . . . [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)
							ed079815a95dd691da310fbdea7d854f4b7b5915
 . . . . . . . . . . . . . . . . [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 (34 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'lurgrotte.at'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.lurgrotte.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 (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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007600db74afeecb29ecb1feca3e716d2ce5b9aabb36f7847183c75d9d4f37b61fbf6400000163291ae2fe0000040300473045022100c172335613b782a2c9ac355f69932d14c53a19297f79e8b8294fbd7d5b26eef1022023360c16ec287478b38129bf105d649fca838e92ffa9bb1329ea216e4de43d15007500293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f47800000163291ae30e000004030046304402200c97d2489dc028b2a7f59179dd6b050d748c371270cc262bc4e8405183cc3d9e02204ccb76e6bd986f228309f7643ecdf9937401c0e3a03c4b5949dfad2fd0dc0a92
 . . . . [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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