www.ch.cam.ac.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 04:2d:c4:82:a4:c6:0a:54:7d:de:a8:11:f2:3c:45:3a:68:8f 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=www.ch.cam.ac.uk
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:2d:c4:82:a4:c6:0a:54:7d:de:a8:11:f2:3c:45:3a:68:8fSerial Number (int): 364023057266254218651996758213589621958799
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: 2f:ec:45:c7:e2:87:ec:d1:c6:dc:e7:22:a4:3d:58:11:93:73:4f:c6
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 9f:af:74:12:b5:c2:d7:0b:d4:4e:c0:a5:f9:6d:26:76:0d:ab:7d:08
Fingerprint (sha256): 02:82:44:dd:a2:bb:b9:ca:0b:b6:2f:26:ce:32:b4:d7:dd:68:b6:0d:99:74:91:27:65:4c:6f:ef:46:59:9c:46
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate www.ch.cam.ac.uk
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for www.ch.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
www.ch.cam.ac.uk
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Certificate
The complete raw certificate details for www.ch.cam.ac.uk in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFVzCCBD+gAwIBAgISBC3EgqTGClR93qgR8jxFOmiPMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTExMTcyMjQ3NTdaFw0y MDAyMTUyMjQ3NTdaMBsxGTAXBgNVBAMTEHd3dy5jaC5jYW0uYWMudWswggEiMA0G CSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQC6w7HdHLRVXkp8zh9he/NK514us4ZW 6n0zaBsc952glaVt7ka8OvFl2LDvsfvE6N72rLGnXqIf6CNrpB1gMKLtzUBtI8sJ EZU0auFG/RcUX8mX2vzpmgoDAxGQCNwrBGo/3VozvzVmd0kSL38mYHryVohism9T 8TcuZMoULu34lUh+zYoIv+WFkc+nseCmCVIH6hr9r6W73NaS/CbPqDiWZPzbCv4q imBTQLYIPtppBajPrF6MQmD1+QWBwYecFyA2KURgE9Id7IJK2dQyGqbvYEDZx/OW r5yjydxKCrSBi83RVxToBLeRKJLXjnb55WgWKc78TIdX0dIy33xJh0lpAgMBAAGj ggJkMIICYDAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsG AQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFC/sRcfih+zRxtznIqQ9WBGT c0/GMB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsGAQUFBwEB BGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNlbmNyeXB0 Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNlbmNyeXB0 Lm9yZy8wGwYDVR0RBBQwEoIQd3d3LmNoLmNhbS5hYy51azBMBgNVHSAERTBDMAgG BmeBDAECATA3BgsrBgEEAYLfEwEBATAoMCYGCCsGAQUFBwIBFhpodHRwOi8vY3Bz LmxldHNlbmNyeXB0Lm9yZzCCAQMGCisGAQQB1nkCBAIEgfQEgfEA7wB2ALIeBcyL os2KIE6HZvkruYolIGdr2vpw57JJUy3vi5BeAAABbnvEE5QAAAQDAEcwRQIhALQF pcZIllpW9+gUBZz/JaaH271cCjn3prk/msRUg1BSAiBG70YLcsSgW0yVkxBvl+2v 2ntsYTegiiAn+G6r5IpQ6AB1AG9Tdqwx8DEZ2JkApFEV/3cVHBHZAsEAKQaNsgia N9kTAAABbnvEE8gAAAQDAEYwRAIgYLD8wXjeY7l+qHfv746+sFUY2BROffxSVvbY iq1G3kYCIBY8aHvObPX1dHIbNt1cnRb/dXs8lDvrgYU258x38MTrMA0GCSqGSIb3 DQEBCwUAA4IBAQBDpalleKK6y1vw40zHMmLrU4vnq3WTPkpzZzpeyNp8+DY23P/+ 2XaG/k82fD990OtNMUcMxkyc6Q1cCMquLbkr404JcXpqdqAS6djQ8KEBGV/rNq9D yP9Xeib90KmcJiq5t+yRk6IDgcS6DLqGnXZMl09wQ6NccrmSgrkWYACGnXuyKpsQ qo4CFaSSNiKSUG4sidwetRp38Msms/3IRTRX+9ir8XHUum5sEdGoMcbfrqarkhmf RlQOAjlwrrELotZ4ritxP2gXh1SmuIc5wecEO5FW9xwjEyq1aDFK51vDzLUk2vc7 D6TZq/cZTZf0domV5uO37Ru5D2JCjREUsVtK -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAusOx3Ry0VV5KfM4fYXvz SudeLrOGVup9M2gbHPedoJWlbe5GvDrxZdiw77H7xOje9qyxp16iH+gja6QdYDCi 7c1AbSPLCRGVNGrhRv0XFF/Jl9r86ZoKAwMRkAjcKwRqP91aM781ZndJEi9/JmB6 8laIYrJvU/E3LmTKFC7t+JVIfs2KCL/lhZHPp7HgpglSB+oa/a+lu9zWkvwmz6g4 lmT82wr+KopgU0C2CD7aaQWoz6xejEJg9fkFgcGHnBcgNilEYBPSHeyCStnUMhqm 72BA2cfzlq+co8ncSgq0gYvN0VcU6AS3kSiS1452+eVoFinO/EyHV9HSMt98SYdJ aQIDAQAB -----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 364023057266254218651996758213589621958799 . . . . . . . . [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 2019-11-17 22:47:57 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-02-15 22:47:57 +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 'www.ch.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 23576825416410568135466497702022473043908883755409374250186435700347323871621945956050853061913232341767413313568049483063238476453764509344182547175324684344109023559082798542773513753894615889289350468223933407800207491044512810191274865386583256108297379078818577571866159753500757402969656846207458471481300597648602109872468010723930933760511882948812843314900102642125625172840121747000065517180270610386391183826891737201807679922870710577912642354935237760793370574228955853773984656438646603797087051215421573530700638390594529293676426530075225867005021886114087724472045655627936957490675568947694620068201 . . . . . . . . . . . . . . . . . . . . [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) 2fec45c7e287ecd1c6dce722a43d581193734fc6 . . . . . . . . . . . . . . . . [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 (20 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.ch.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 (244 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes) 00ef007600b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016e7bc413940000040300473045022100b405a5c648965a56f7e814059cff25a687dbbd5c0a39f7a6b93f9ac454835052022046ef460b72c4a05b4c9593106f97edafda7b6c6137a08a2027f86eabe48a50e80075006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016e7bc413c80000040300463044022060b0fcc178de63b97ea877efef8ebeb05518d8144e7dfc5256f6d88aad46de460220163c687bce6cf5f574721b36dd5c9d16ff757b3c943beb818536e7cc77f0c4eb . . . . [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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