techlib.cz
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:54:7e:68:a9:25:02:a0:96:a6:55:5d:02:95:91:9d:4b:82 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=techlib.cz
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:54:7e:68:a9:25:02:a0:96:a6:55:5d:02:95:91:9d:4b:82Serial Number (int): 290088602773641236032588558584122116492162
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 51:35:a5:76:5d:b7:58:bb:44:6f:54:dc:87:f5:01:e6:71:fe:6f:97
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 6b:0e:db:e8:ba:f3:14:b9:c2:9c:0b:63:6b:be:f3:18:0b:43:48:3b
Fingerprint (sha256): 3a:34:fe:34:fe:88:f3:78:43:51:b9:c4:f7:43:38:b4:19:2f:8a:53:62:f6:88:fe:2d:a1:81:8c:9d:de:53:cd
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate techlib.cz
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for techlib.cz
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
techlib.cz
www.techlib.cz
www.techlib.cz
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old.techlib.cz
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liber-lag2012.techlib.cz
liber-lag2012.techlib.cz
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eod2013.techlib.cz
stanik.techlib.cz
psh.techlib.cz
elag2011.techlib.cz
kramerius.techlib.cz
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vykukator.techlib.cz
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techlib.cz
Certificate
The complete raw certificate details for techlib.cz in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFXTCCBEWgAwIBAgISA1R+aKklAqCWplVdApWRnUuCMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTExMDEyMjA1MTdaFw0y MDAxMzAyMjA1MTdaMBUxEzARBgNVBAMTCnRlY2hsaWIuY3owggEiMA0GCSqGSIb3 DQEBAQUAA4IBDwAwggEKAoIBAQCnk56x/ymayg3q+1QCfVfG3uzKeQtS6sD5pq9P bLk5scmIE2EW9C9JgnzSVclqZaXLMjRVIjRt4KlCCnympPMGjwU+gfLZUzGocxlW 9fDVPaZcetsuri0yCXgavhQgofMothjMoadqAEdZmDQZ8m5Zf4L/W/rs4E9Ik+EH Ny5cXtfdt1MAj9v1amVlWM5Gsa6s7Jj6fVl/Z4V9IecWwsAhnYnPNY0a1PNJg2HO zOAq0p7Jj2ERIHZaivWwXedLrP6/V7J6tEIir67etfn/cbnp+45cpDjHA/HyLGUw uUewJNjUcLAvdBG0wEWR+rlzfBGstkVUPwcle57471PMZULfAgMBAAGjggJwMIIC bDAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMC MAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFFE1pXZdt1i7RG9U3If1AeZx/m+XMB8G A1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsGAQUFBwEBBGMwYTAu BggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNlbmNyeXB0Lm9yZzAv BggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNlbmNyeXB0Lm9yZy8w JQYDVR0RBB4wHIIKdGVjaGxpYi5jeoIOd3d3LnRlY2hsaWIuY3owTAYDVR0gBEUw QzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYaaHR0cDov L2Nwcy5sZXRzZW5jcnlwdC5vcmcwggEFBgorBgEEAdZ5AgQCBIH2BIHzAPEAdwCy HgXMi6LNiiBOh2b5K7mKJSBna9r6cOeySVMt74uQXgAAAW4pN0NgAAAEAwBIMEYC IQDOw2JshvvJiTDJ+C5r/racZ+7tk9uVJM7kxFM23t2GigIhAL1MpkDGm4jp1zSU VbX+Yl5rb6d9MtZxBfZlgV710Lk5AHYAXqdz+d9WwOe1Nkh90EngMnqRmgyEoRIS hBh1loFxRVgAAAFuKTdFMwAABAMARzBFAiAIXlHo0LxdTuzFH6+vtDJqDqFqt+tj ue9IKMAoIDnlAAIhAJZ5uFNLcjeVG4fld86xrcuqePC68moMLMklk5ptWCcmMA0G CSqGSIb3DQEBCwUAA4IBAQB+9xJT4zKyCiflxrS3cXqMwc5mp7xMcBPG+DAJBjCu pQVS/r19QrfVEgn2SQZyoDBlny50UWv22CB0qtoXiZk4e9LSQhXAwOxgRIrYEwez qem47HY6Ku5Shv0a5Sg9tItAnOIz/DnMRNPmwmQcc2cgdsHk6XggpR/bgp0Btt/0 WGp6t0sIoGouSfvN81X7YQDg5jfErR4obIsRKLld4iVtQOFBdEEroH36+g5IQfMF zbraUa7mA7m+3/VxcVZuk62mvPVV/zN5XP6tMmveo461rYaJpvXzPQLJ1TSNKlHX BUVL0O2BcmFA76MU0jZNLIPaPsy+Sq/zJ33h6Xiw96DE -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAp5Oesf8pmsoN6vtUAn1X xt7synkLUurA+aavT2y5ObHJiBNhFvQvSYJ80lXJamWlyzI0VSI0beCpQgp8pqTz Bo8FPoHy2VMxqHMZVvXw1T2mXHrbLq4tMgl4Gr4UIKHzKLYYzKGnagBHWZg0GfJu WX+C/1v67OBPSJPhBzcuXF7X3bdTAI/b9WplZVjORrGurOyY+n1Zf2eFfSHnFsLA IZ2JzzWNGtTzSYNhzszgKtKeyY9hESB2Wor1sF3nS6z+v1eyerRCIq+u3rX5/3G5 6fuOXKQ4xwPx8ixlMLlHsCTY1HCwL3QRtMBFkfq5c3wRrLZFVD8HJXue+O9TzGVC 3wIDAQAB -----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 290088602773641236032588558584122116492162 . . . . . . . . [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 2019-11-01 22:05:17 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-01-30 22:05:17 +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 'techlib.cz' . . . . . . . . [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 21154591016827602646674784870688405373561325729802859439587144446726507809793135821049100406898345288391687542161878368241804906030751798722522241317283580222950629086617346188272258116903862110840643126952789744124005732783949670083104876807763686430359348748829539862834695230050088562265358020608218826714072952918030242612973688519076465602648479191440210397924653543490711919025240974438300971397933954310813139976066412225508154403110621847671654737158755714414954165938361996360464670345299458161851682859307286535293106763467105386176760885128425040277087441229651182103148164338962017686562989247773144335071 . . . . . . . . . . . . . . . . . . . . [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) 5135a5765db758bb446f54dc87f501e671fe6f97 . . . . . . . . . . . . . . . . [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 (30 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'techlib.cz' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.techlib.cz' . . . . . . . . . . . . . . . . [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) 00f1007700b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016e293743600000040300483046022100cec3626c86fbc98930c9f82e6bfeb69c67eeed93db9524cee4c45336dedd868a022100bd4ca640c69b88e9d7349455b5fe625e6b6fa77d32d67105f665815ef5d0b9390076005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016e2937453300000403004730450220085e51e8d0bc5d4eecc51fafafb4326a0ea16ab7eb63b9ef4828c0282039e5000221009679b8534b7237951b87e577ceb1adcbaa78f0baf26a0c2cc925939a6d582726 . . . . [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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