techlib.cz
Issued by R3
About this certificate
This digital certificate with serial number 03:7a:16:a4:f7:00:92:5d:d7:e0:2c:d8:6f:49:fb:e8:34:44 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): 03:7a:16:a4:f7:00:92:5d:d7:e0:2c:d8:6f:49:fb:e8:34:44Serial Number (int): 302881406122027770706280194571096849658948
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: bc:d8:ce:a5:24:c9:d5:88:7e:a3:99:6d:a1:40:9f:c5:f1:81:a3:a3
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): fa:3f:c7:27:85:d1:96:fd:4f:ad:ab:33:79:07:32:b2:36:b1:08:df
Fingerprint (sha256): 38:37:11:36:f7:2b:1d:a8:23:59:b7:b8:d5:a7:cd:0a:2d:38:ef:a6:91:3e:d4:dd:de:81:9b:9d:24:52:99:ea
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.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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eod2013.techlib.cz
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psh.techlib.cz
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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----- MIIFKzCCBBOgAwIBAgISA3oWpPcAkl3X4CzYb0n76DREMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yMDEyMjYyMjA0MzhaFw0yMTAzMjYyMjA0MzhaMBUxEzARBgNVBAMT CnRlY2hsaWIuY3owggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDMeUne K3bJ4JxpzcPQ5v7IEbP/V8iCkRXbN829tOFSQhAu3iLAosBUb9bUm1QqYI1adlzq uqLws5EkjtNzuycJ5YbxvKUrWV47Tc97CzjrgkqcbXdQ3nUxr8G2vFXeYY6hGc+7 aqhEb34Ypkk4nWp5/vU+XxjpAHTgOFuHghzadHNyCdjC6gl9WLtDNWfoDjJUR3Jl H7aYQNJmG3IRIypgc2FRFAmxn5vgtVKvZqEAEDseJy0c9Sy4wrcO80SC6McnUouR lrz8A+eQQ8JefWcDpvV0+AIIGYAjuhI5iwIgdJn9uOiEHB4qze4Nd5SEZhGbteb1 pBbWDe3dtjFWZUGtAgMBAAGjggJWMIICUjAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0l BBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYE FLzYzqUkydWIfqOZbaFAn8XxgaOjMB8GA1UdIwQYMBaAFBQusxe3WFbLrlAJQOYf r52LFMLGMFUGCCsGAQUFBwEBBEkwRzAhBggrBgEFBQcwAYYVaHR0cDovL3IzLm8u bGVuY3Iub3JnMCIGCCsGAQUFBzAChhZodHRwOi8vcjMuaS5sZW5jci5vcmcvMCUG A1UdEQQeMByCCnRlY2hsaWIuY3qCDnd3dy50ZWNobGliLmN6MEwGA1UdIARFMEMw CAYGZ4EMAQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9j cHMubGV0c2VuY3J5cHQub3JnMIIBBQYKKwYBBAHWeQIEAgSB9gSB8wDxAHYARJRl LrDuzq/EQAfYqP4owNrmgr7YyzG1P9MzlrW2gagAAAF2oUv0ugAABAMARzBFAiAW RJJU0dfuNT1d7fGfWB+Q56+XOyoZbCVKnU0WO+m4wgIhAMV39Rp7/ct9ufTc6UDu Z6ei6UWIyzdw4TWQsiS4kJ7GAHcA9lyUL9F3MCIUVBgIMJRWjuNNExkzv98MLyAL zE7xZOMAAAF2oUv0dwAABAMASDBGAiEApdbDlYmqOizbPLj7myPB8YBU2uYbAYjs lq3Y/uTEAUwCIQDNGHijBHQ38ox/bUHcLJmfY6ArtRipPQmM+eupHXAWqjANBgkq hkiG9w0BAQsFAAOCAQEANI+S4fqdZ3Px+yENIH6f70K4Fb2D7rQKCMgZ0RfrFZNM 4e7WMt1mIrs4DWOEvnEPHkvPtwos3kL8ABQwmJqA9VJERPgK9jY40YudOg+DpioM 4nPw42rJTdXB9MMCoJtFEXVQPwRaXkzRl1i33WbIhjn7DJCFkzBYsXz+Txd6Da8A yLu+gMLsHFLdKYSKb+dlyBhPkqQSaQDBHs6xIV2KdBuXkixUdPtsUVz8tpYn+zUk kP9TYlj0ZxUXsAWriDsoQ9rrpBd3pxtakUYqrJ+VnaALglVE2RN8SwWKylVRA++4 2L3lY5QdlAMAc7aeRumdv0PrJaFkzDb3mVdXkVCRPQ== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzHlJ3it2yeCcac3D0Ob+ yBGz/1fIgpEV2zfNvbThUkIQLt4iwKLAVG/W1JtUKmCNWnZc6rqi8LORJI7Tc7sn CeWG8bylK1leO03Pews464JKnG13UN51Ma/BtrxV3mGOoRnPu2qoRG9+GKZJOJ1q ef71Pl8Y6QB04Dhbh4Ic2nRzcgnYwuoJfVi7QzVn6A4yVEdyZR+2mEDSZhtyESMq YHNhURQJsZ+b4LVSr2ahABA7HictHPUsuMK3DvNEgujHJ1KLkZa8/APnkEPCXn1n A6b1dPgCCBmAI7oSOYsCIHSZ/bjohBweKs3uDXeUhGYRm7Xm9aQW1g3t3bYxVmVB rQIDAQAB -----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 302881406122027770706280194571096849658948 . . . . . . . . [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 2020-12-26 22:04:38 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2021-03-26 22:04:38 +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 25812423824387200567990511792796760452363638016185524198771075764443676957316852795947942109072468716435042717498806140969406743757031987223489035307597956570235098086755528677194396862976178410971097895914923627318201667886762900129500611189446359698629815944886277922266237785128776853082850540455572659784670954626878321889538774138633064479277830270330501893934623736703484683137798619555656218783082408243637424611026213665080193741188576578565066158899256268589320382769353444836200620348080878740338806453322018463362459029289499381854001483953083593515936693256602386470338461599247556271544494616249347948973 . . . . . . . . . . . . . . . . . . . . [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) bcd8cea524c9d5887ea3996da1409fc5f181a3a3 . . . . . . . . . . . . . . . . [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 (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) 00f10076004494652eb0eeceafc44007d8a8fe28c0dae682bed8cb31b53fd33396b5b681a800000176a14bf4ba0000040300473045022016449254d1d7ee353d5dedf19f581f90e7af973b2a196c254a9d4d163be9b8c2022100c577f51a7bfdcb7db9f4dce940ee67a7a2e94588cb3770e13590b224b8909ec6007700f65c942fd1773022145418083094568ee34d131933bfdf0c2f200bcc4ef164e300000176a14bf4770000040300483046022100a5d6c39589aa3a2cdb3cb8fb9b23c1f18054dae61b0188ec96add8fee4c4014c022100cd1878a3047437f28c7f6d41dc2c999f63a02bb518a93d098cf9eba91d7016aa . . . . [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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