leopard.bios.cf.ac.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:e5:03:de:2b:4b:84:23:4a:56:b0:48:af:b8:1d:95:10:d2 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=leopard.bios.cf.ac.uk
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:e5:03:de:2b:4b:84:23:4a:56:b0:48:af:b8:1d:95:10:d2Serial Number (int): 339266661072192217382682728729826292994258
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 11:c8:a1:34:8c:85:5f:94:e3:1a:f0:40:28:5f:81:96:d5:59:4e:7a
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): cb:2b:0b:7a:64:90:9f:d4:c1:c0:5d:26:f6:af:f7:a4:38:72:86:51
Fingerprint (sha256): 1a:5a:87:df:56:f6:d7:bc:2a:a7:3b:19:59:60:dd:3e:fc:c6:d6:f5:27:e1:db:7c:40:db:00:c9:48:5f:36:de
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate leopard.bios.cf.ac.uk
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for leopard.bios.cf.ac.uk
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
leopard.bios.cf.ac.uk
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Certificate
The complete raw certificate details for leopard.bios.cf.ac.uk in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFYjCCBEqgAwIBAgISA+UD3itLhCNKVrBIr7gdlRDSMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA1MDUxOTAzMzFaFw0x OTA4MDMxOTAzMzFaMCAxHjAcBgNVBAMTFWxlb3BhcmQuYmlvcy5jZi5hYy51azCC ASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBANVIc+Jj4Fg4xY2mO6MbXF1y nxYXbcC3e2VgeXUyW8KVhk/0Kk5YoF3u4f187F71PUcY0a+v5R7lMCbQr5G2CMlB HhMp8MwvkmQnyBJ8v29ndiOgCKzJpwzQX3xvd0ukQt8pRHAV4xQZt4yfkPw35OqV YHkAbaGHutVRpTZ/ZWRBck17W6DbWAp7REWhDgpjCFcHtSY7U3nkS9zko67uSHsG Jv6v9p71SDmOcRNUfdmxhTDj+kbMVn+GxDsvrjr6Fhd1R7qanP5eJgNxNqi/iw47 deU5ih4V03yY32/27GSZgNCqyq8jcdSOoGQetY7QVdzeAsxsXBU+qxluYQwEyK8C AwEAAaOCAmowggJmMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcD AQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUEcihNIyFX5TjGvBA KF+BltVZTnowHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo7KEwbwYIKwYB BQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMubGV0c2Vu Y3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMubGV0c2Vu Y3J5cHQub3JnLzAgBgNVHREEGTAXghVsZW9wYXJkLmJpb3MuY2YuYWMudWswTAYD VR0gBEUwQzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYa aHR0cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcwggEEBgorBgEEAdZ5AgQCBIH1BIHy APAAdgBvU3asMfAxGdiZAKRRFf93FRwR2QLBACkGjbIImjfZEwAAAWqJmCpNAAAE AwBHMEUCIQDtFMultn/Hauz/9NUNblx/cuMU4c1DT/XDz37h8sNVBwIgVLY+Rfl2 WEs0o7M8JvSnYhxq29CEIfABz9yROsN7u18AdgBj8tvN6DvMLM8LcoQnV2szpI1h d4+9daY4scdoVEvYjQAAAWqJmCjmAAAEAwBHMEUCIBlBXWhLATRKwPhfw3mKRZB+ PBiqO3Jqjef0sEcy4EfeAiEAsRV0iXHltUEDi9HQUW7qluAeAIWrsyI0acDgkPTZ 09MwDQYJKoZIhvcNAQELBQADggEBAHrUmrhGkNUIqQ12EmxOqhY1/B5+JarGi7nw 6QcRHTlSKe2WegVWU59LQpcUuZGe+DSTdmYfpObs3QJYfxarH6yvPxD93Vwjh4H6 1vsi4hcnNzQAi1h7DPPlFRnQS2T+t7y39Iq0KS5hsYIDqhJ11GbCXpnUt0N4jF6D Y/3tLEsPAW4VDOTXS27MF1bCTP/vQ1wthl5gztAvbeIoBorsxzY8gjXkWtKUXiBP WIfQ8/o6GP/RWLY8vi1IJFh5i4XneH4yU1EGx6W3PbvErcR9v7W2DuEmjYUQGogC 3y6M0GB/SIBNmSRVxqVb7rWDODmdwQLKKSsnuptefAb4CKCP5GM= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1Uhz4mPgWDjFjaY7oxtc XXKfFhdtwLd7ZWB5dTJbwpWGT/QqTligXe7h/XzsXvU9RxjRr6/lHuUwJtCvkbYI yUEeEynwzC+SZCfIEny/b2d2I6AIrMmnDNBffG93S6RC3ylEcBXjFBm3jJ+Q/Dfk 6pVgeQBtoYe61VGlNn9lZEFyTXtboNtYCntERaEOCmMIVwe1JjtTeeRL3OSjru5I ewYm/q/2nvVIOY5xE1R92bGFMOP6RsxWf4bEOy+uOvoWF3VHupqc/l4mA3E2qL+L Djt15TmKHhXTfJjfb/bsZJmA0KrKryNx1I6gZB61jtBV3N4CzGxcFT6rGW5hDATI rwIDAQAB -----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 339266661072192217382682728729826292994258 . . . . . . . . [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 2019-05-05 19:03:31 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-08-03 19:03:31 +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 'leopard.bios.cf.ac.uk' . . . . . . . . [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 26924486702511472739963701020765490861246913709885426495110601540451110295680741407741911680704691852621832226270764060039734097669987319083399811768129816950031101143733029350689707758125418809708504699797468106678326872465869624432637640940143549553477037381118821373471597669651294418059504607815300224447067720813582722394272210679961186804820432206489977500762117469852416059992290508742142048406203645496880662726850178164492231256325943658513792775414316903073909357378304642450368688993026557448873861776555309107447354782644094492091910476210281643230912502086363148872004921763989500900470704242796414683311 . . . . . . . . . . . . . . . . . . . . [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) 11c8a1348c855f94e31af040285f8196d5594e7a . . . . . . . . . . . . . . . . [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 (25 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'leopard.bios.cf.ac.uk' . . . . . . . . . . . . . . . . [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 (245 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes) 00f00076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016a89982a4d0000040300473045022100ed14cba5b67fc76aecfff4d50d6e5c7f72e314e1cd434ff5c3cf7ee1f2c35507022054b63e45f976584b34a3b33c26f4a7621c6adbd08421f001cfdc913ac37bbb5f00760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016a899828e60000040300473045022019415d684b01344ac0f85fc3798a45907e3c18aa3b726a8de7f4b04732e047de022100b115748971e5b541038bd1d0516eea96e01e0085abb3223469c0e090f4d9d3d3 . . . . [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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