como.ceb.cam.ac.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 04:bf:1c:0e:25:d2:b4:2f:1e:fd:2b:31:44:a9:90:f5:0a:aa 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=como.ceb.cam.ac.uk
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:bf:1c:0e:25:d2:b4:2f:1e:fd:2b:31:44:a9:90:f5:0a:aaSerial Number (int): 413480367652121063970758067715919469415082
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: 1b:88:1a:52:2f:15:15:91:ff:1e:b0:5d:51:3c:3b:42:a8:84:8f:65
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): ed:78:29:a7:7a:bd:86:56:42:3b:ce:9b:ef:45:f2:36:19:3d:bb:ea
Fingerprint (sha256): 02:eb:a9:23:29:9f:8f:db:60:73:a3:07:c7:52:cb:0a:f4:1f:de:c2:2e:36:a4:ad:0d:d4:0d:5f:bc:53:5e:12
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate como.ceb.cam.ac.uk
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for como.ceb.cam.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
como.ceb.cam.ac.uk
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Certificate
The complete raw certificate details for como.ceb.cam.ac.uk in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFXTCCBEWgAwIBAgISBL8cDiXStC8e/SsxRKmQ9QqqMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDAxMDIxNzM3NTlaFw0y MDA0MDExNzM3NTlaMB0xGzAZBgNVBAMTEmNvbW8uY2ViLmNhbS5hYy51azCCASIw DQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAM+YVGeOOD4wA+f1ig8UabdcOUAq acH4hIO3BlVCx1XtOSHIGpYrRnd5tAHgPDVKzY+npNGaQb7BhPkmefR7rIORb/7k EpIN4Hfy0TRorEUmgY3ozJaFZMzgT0cBrGa/DVRpFoMmGBiVp774xpAyE6jmD50z 6krD1vwMk5nZS0hzLgOQvGEx6R0KrUAZQuuiX7OZ6XEgILrZN5dDrHMpG1R7HC7/ QdeHr6vYB9XmzufFlAFOKuodhJfyuaBw1IE/A0OVOIEf7t4nn7jAtAGSONUqvb2Q YwNkqxKZWQVBfFdypfxBsC0asz/nXstGnWtqLQQf7W6nExx9pc4TNJnIU7kCAwEA AaOCAmgwggJkMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYI KwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUG4gaUi8VFZH/HrBdUTw7 QqiEj2UwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo7KEwbwYIKwYBBQUH AQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMubGV0c2VuY3J5 cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMubGV0c2VuY3J5 cHQub3JnLzAdBgNVHREEFjAUghJjb21vLmNlYi5jYW0uYWMudWswTAYDVR0gBEUw QzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYaaHR0cDov L2Nwcy5sZXRzZW5jcnlwdC5vcmcwggEFBgorBgEEAdZ5AgQCBIH2BIHzAPEAdwDw laRZ8gDRgkAQLS+TiI6tS/4dR+OZ4dA0prCoqo6ycwAAAW9njNGWAAAEAwBIMEYC IQDG3tloJu+Bj05DLYe5y/RahPhBUmtaoMdwHUDpFumdAAIhAL2lsHcdX3ICJdyI DHytx/PH/RUe0iJeAMP9+0j1NxDzAHYAsh4FzIuizYogTodm+Su5iiUgZ2va+nDn sklTLe+LkF4AAAFvZ4zRigAABAMARzBFAiA25sZe0FIbv/bSz3Y/jxXzm5vdEClH T51MTgVAhG88jQIhAIiaXsylPxnlRsCKRzxyl3bzTH3cTg8qKY8u4JbJiAQFMA0G CSqGSIb3DQEBCwUAA4IBAQBTj+eO0f0v+vBRhzT/lxn0A4yizJQ/kwwrqb3A+efj L5UhCObhMHmA6sLdwAX7RJ6HbVPtG3ZiiO09c+zRyTn7Yi+j4++v0tylOf4m9lR9 bOPR2EGC18g2gAxbQwA7bn7vMJl2UKgFWIXDuiA7Y62XoFwCZTTnw738t0MUgYtG M5Aj+GSPv5Uzl+COXp1p2M3cahow2pUL3EbtZ6lMPV8SfNVf+HK4mpKjI06WGTqc CHqPaxevp4ggMsfuPAoKGx8CPNL7EOWm6S0LSI6SdEosKQfEsb5Hi7haFFnHcdmH A0dZ/9m2FsE3zaXPDtw0CsIJndpcCHNmQReSGLISmHPa -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAz5hUZ444PjAD5/WKDxRp t1w5QCppwfiEg7cGVULHVe05IcgalitGd3m0AeA8NUrNj6ek0ZpBvsGE+SZ59Hus g5Fv/uQSkg3gd/LRNGisRSaBjejMloVkzOBPRwGsZr8NVGkWgyYYGJWnvvjGkDIT qOYPnTPqSsPW/AyTmdlLSHMuA5C8YTHpHQqtQBlC66Jfs5npcSAgutk3l0Oscykb VHscLv9B14evq9gH1ebO58WUAU4q6h2El/K5oHDUgT8DQ5U4gR/u3iefuMC0AZI4 1Sq9vZBjA2SrEplZBUF8V3Kl/EGwLRqzP+dey0ada2otBB/tbqcTHH2lzhM0mchT uQIDAQAB -----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 413480367652121063970758067715919469415082 . . . . . . . . [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 2020-01-02 17:37:59 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-04-01 17:37:59 +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 'como.ceb.cam.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 26206445705208009780199010732608816260785947169516801490950269944900304657363219753237901366458012835937184307275569922667366829186055337711306443172622487290088843658737632059116967735436245098492842107194722465708895369265014539542651909369480135013861760440782091111223241370321455500335290421518564558520985423575431348414165574443731017045837427356328564991003388824637343886000526616865236082614189903928795726436452054860367684431196517589678861235121928707861203825240104141183756839003291126452079052456554161765158707440301039468344065336561280143408124907637069967893044631889440062074085592536444138181561 . . . . . . . . . . . . . . . . . . . . [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) 1b881a522f151591ff1eb05d513c3b42a8848f65 . . . . . . . . . . . . . . . . [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 (22 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'como.ceb.cam.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 (246 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes) 00f1007700f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016f678cd1960000040300483046022100c6ded96826ef818f4e432d87b9cbf45a84f841526b5aa0c7701d40e916e99d00022100bda5b0771d5f720225dc880c7cadc7f3c7fd151ed2225e00c3fdfb48f53710f3007600b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016f678cd18a0000040300473045022036e6c65ed0521bbff6d2cf763f8f15f39b9bdd1029474f9d4c4e0540846f3c8d022100889a5ecca53f19e546c08a473c729776f34c7ddc4e0f2a298f2ee096c9880405 . . . . [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) 00538fe78ed1fd2ffaf0518734ff9719f4038ca2cc943f930c2ba9bdc0f9e7e32f952108e6e1307980eac2ddc005fb449e876d53ed1b766288ed3d73ecd1c939fb622fa3e3efafd2dca539fe26f6547d6ce3d1d84182d7c836800c5b43003b6e7eef30997650a8055885c3ba203b63ad97a05c026534e7c3bdfcb74314818b46339023f8648fbf953397e08e5e9d69d8cddc6a1a30da950bdc46ed67a94c3d5f127cd55ff872b89a92a3234e96193a9c087a8f6b17afa7882032c7ee3c0a0a1b1f023cd2fb10e5a6e92d0b488e92744a2c2907c4b1be478bb85a1459c771d987034759ffd9b616c137cda5cf0edc340ac2099dda5c08736641179218b2129873da