cam.ac.uk
Issued by R3
About this certificate
This digital certificate with serial number 03:23:15:3a:b0:83:e8:fe:2b:c5:80:38:5c:73:ab:83:af:65 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:
- DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
- Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
- Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)
Certificate Subject
CN=cam.ac.uk
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:23:15:3a:b0:83:e8:fe:2b:c5:80:38:5c:73:ab:83:af:65Serial Number (int): 273274959158797951742627608078190809165669
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 2d:26:ab:0a:02:66:5b:60:79:6b:68:27:d4:7d:9b:b0:fc:f7:f5:b2
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): a7:88:0e:f3:f7:5b:40:d9:a0:42:58:dc:5a:59:cf:b7:50:be:79:c6
Fingerprint (sha256): 00:4b:c1:23:66:c9:db:52:22:ea:23:29:72:9f:7b:03:c5:24:e1:aa:f2:51:f4:bb:6a:5c:c2:ab:31:38:df:6d
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate cam.ac.uk
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for 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
cam.ac.uk
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Certificate
The complete raw certificate details for cam.ac.uk in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIE3jCCA8agAwIBAgISAyMVOrCD6P4rxYA4XHOrg69lMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yMzA5MjYxMDU1MzRaFw0yMzEyMjUxMDU1MzNaMBQxEjAQBgNVBAMT CWNhbS5hYy51azCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAL6aAMFs v9p0riaczwVn97Eruv9aUnCCX/08BrLU37Y+N8lSwqeCPWM3oBPn3aKfyyO53aBc 0MSHiEnC1vYxrxcX6CVvDtI3xpye+dDWfKRebEPwilEUC4IbCI/GywQYSkoiuqv2 1Ff6XWT4prPpvpXMLrnzKxn9kX1Bgqn8PkHOcY3LTObGcJWuyh6Of0u8Ix2WK8Ug sUyfU4hk2WyJhBNQAQSvgt2SE04GEXb1IJzmRxbqHZjNOqFpOQB5idHzHFm1joPM iOzQCPmedyoYW+LNKbvZnXJsg7EaNEcbZOw559Qzwtg7fu1hzKuKLPyj40wqS8oU zzjUouXwub++T7ECAwEAAaOCAgowggIGMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUE FjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQU LSarCgJmW2B5a2gn1H2bsPz39bIwHwYDVR0jBBgwFoAUFC6zF7dYVsuuUAlA5h+v nYsUwsYwVQYIKwYBBQUHAQEESTBHMCEGCCsGAQUFBzABhhVodHRwOi8vcjMuby5s ZW5jci5vcmcwIgYIKwYBBQUHMAKGFmh0dHA6Ly9yMy5pLmxlbmNyLm9yZy8wFAYD VR0RBA0wC4IJY2FtLmFjLnVrMBMGA1UdIAQMMAowCAYGZ4EMAQIBMIIBAwYKKwYB BAHWeQIEAgSB9ASB8QDvAHUAtz77JN+cTbp18jnFulj0bF38Qs96nzXEnh0JgSXt tJkAAAGK0Vg3gAAABAMARjBEAiBRnkdchK9hHvZMi1flKeNFy1qp/IuHx3bmuDh4 GB4LkAIgLFRgbLbyIYoC4thuRqv+oJi1h8n+4VYpavhxQ+NI984AdgDoPtDaPvUG NTLnVyi8iWvJA9PL0RFr7Otp4Xd9bQa9bgAAAYrRWDd4AAAEAwBHMEUCICaTfzf1 wgXLywI4OoIqZXHNJfV65DzJePFMs5TMgW6HAiEAonTza63awofXpFXWxcMNx+Qk 05QP0RgUUSNDCBmxi30wDQYJKoZIhvcNAQELBQADggEBAFDEON4n5Pau8zR3HlDq 5HofibtJJTDjMI/6eyavwfmlzzyAB+NyKAvjuD4YFLg+1WAuIFD8vu2+cC0AUJZg OOqwOCpoJ+iEoG4gccRkkyzILOQ1goz3USgVk2uMOmfbxhTVyzZ6fKt/HsG+V873 UrvRGunIFY0iXysPS7csSAZ9Dfzk3ryGmXPQ2LZPBqSaPuQOL0+qOsdvIpIyvf1G 1gwfrio4wWZiCJx/eIfhuJcZSeAxxM3aC/c2Vz01Sc15oE0Lht6n0b/g5Ajz5GzW KAIiJzEdqp2nf94uJi5lpP9IJR9huAOaQWcCKy4w74w9s0eqmA0XRGWchCXWpymV peY= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvpoAwWy/2nSuJpzPBWf3 sSu6/1pScIJf/TwGstTftj43yVLCp4I9YzegE+fdop/LI7ndoFzQxIeIScLW9jGv FxfoJW8O0jfGnJ750NZ8pF5sQ/CKURQLghsIj8bLBBhKSiK6q/bUV/pdZPims+m+ lcwuufMrGf2RfUGCqfw+Qc5xjctM5sZwla7KHo5/S7wjHZYrxSCxTJ9TiGTZbImE E1ABBK+C3ZITTgYRdvUgnOZHFuodmM06oWk5AHmJ0fMcWbWOg8yI7NAI+Z53Khhb 4s0pu9mdcmyDsRo0Rxtk7Dnn1DPC2Dt+7WHMq4os/KPjTCpLyhTPONSi5fC5v75P sQIDAQAB -----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 273274959158797951742627608078190809165669 . . . . . . . . [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 2023-09-26 10:55:34 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-12-25 10:55:33 +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 '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 24061219629285801526474750851260933251650006114861456241147377601419183938771864180485068632685298101405054532311738397468425078570937076639324781900178754207945219604257806085940725859615040472588959276198588074463065203478140572459492076208978431914764040545925537287557013314618773561839172278362112413972398953215226565824297784739033869786650884314486582001252454097243980775356093614640519491740371576327299232580545775849372795181081360573921901613332059982619102077253476469378556990852482430749057035571407401051606915049710774616092426802315244665048852932861799171941362915788472171165473998607588924477361 . . . . . . . . . . . . . . . . . . . . [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) 2d26ab0a02665b60796b6827d47d9bb0fcf7f5b2 . . . . . . . . . . . . . . . . [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 (13 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '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 (12 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 1.3.6.1.4.1.11129.2.4.2 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes) 00ef007500b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb4990000018ad158378000000403004630440220519e475c84af611ef64c8b57e529e345cb5aa9fc8b87c776e6b83878181e0b9002202c54606cb6f2218a02e2d86e46abfea098b587c9fee156296af87143e348f7ce007600e83ed0da3ef5063532e75728bc896bc903d3cbd1116beceb69e1777d6d06bd6e0000018ad15837780000040300473045022026937f37f5c205cbcb02383a822a6571cd25f57ae43cc978f14cb394cc816e87022100a274f36baddac287d7a455d6c5c30dc7e424d3940fd118145123430819b18b7d . . . . [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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