safety.eng.cam.ac.uk
Issued by R3
About this certificate
This digital certificate with serial number 04:9d:57:53:96:42:af:1a:d8:ac:03:c7:b8:b9:2a:b5:8c:a6 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=safety.eng.cam.ac.uk
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:9d:57:53:96:42:af:1a:d8:ac:03:c7:b8:b9:2a:b5:8c:a6Serial Number (int): 401989552177545563027567538532934258887846
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: 67:34:9b:be:36:0a:7c:ea:a3:a7:c0:a5:5f:4d:2b:a5:df:97:af:ab
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): 8c:d6:bf:22:77:7f:c7:aa:14:4e:f8:d4:02:bf:17:ab:ee:60:1c:22
Fingerprint (sha256): 01:ef:51:6d:b2:52:37:1b:b2:37:c4:1c:ab:08:87:94:ce:d6:44:e4:88:ab:28:7b:93:c4:d6:08:7b:90:0b:7b
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate safety.eng.cam.ac.uk
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for safety.eng.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
safety.eng.cam.ac.uk
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Certificate
The complete raw certificate details for safety.eng.cam.ac.uk in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFLDCCBBSgAwIBAgISBJ1XU5ZCrxrYrAPHuLkqtYymMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yMzA0MTAwNDU1NDJaFw0yMzA3MDkwNDU1NDFaMB8xHTAbBgNVBAMT FHNhZmV0eS5lbmcuY2FtLmFjLnVrMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIB CgKCAQEAyjRLSCB1MVPx3GMrScs8i3fRz1fvjRmWdOESfgnQ+tq5IOKD+mbQERgj 6W3LdF44vPU5MSW8UZsd0QykD4mrSmtJrvvNN9LcZAywrnvNCjvOFkoVZzxsrG/H fbC63PniiMNbAyB2fzyWqk2FGtewY4YO3zSriJtzz0EE6jb4KGeQAgE2wZRyDy50 nH9h1gx5cWHg9ZfvMqSYmwWke+ryqytO8vg2Nzqp/23MZ28kwYVwXQgtFupn+1fC LIjEFJWxdEe6ZfGbgGXupokomOD1fBZJEZi9b9JmoaZl6MLDC7GP2oGTIJbxSf+i eK676MKlE86HG42Ny2bPu+iAp4T1iwIDAQABo4ICTTCCAkkwDgYDVR0PAQH/BAQD AgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8EAjAA MB0GA1UdDgQWBBRnNJu+Ngp86qOnwKVfTSul35evqzAfBgNVHSMEGDAWgBQULrMX t1hWy65QCUDmH6+dixTCxjBVBggrBgEFBQcBAQRJMEcwIQYIKwYBBQUHMAGGFWh0 dHA6Ly9yMy5vLmxlbmNyLm9yZzAiBggrBgEFBQcwAoYWaHR0cDovL3IzLmkubGVu Y3Iub3JnLzAfBgNVHREEGDAWghRzYWZldHkuZW5nLmNhbS5hYy51azBMBgNVHSAE RTBDMAgGBmeBDAECATA3BgsrBgEEAYLfEwEBATAoMCYGCCsGAQUFBwIBFhpodHRw Oi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCCAQIGCisGAQQB1nkCBAIEgfMEgfAA7gB1 ALc++yTfnE26dfI5xbpY9Gxd/ELPep81xJ4dCYEl7bSZAAABh2m8BG4AAAQDAEYw RAIgD/ny6C0EpxOzXk9C/OvNfFSyJhRxrq9AthrBUrdBBiMCIDmkxSGNPgEqjbKo oF4LZjFeslX9b/cwOa6OrBiJy3wlAHUA6D7Q2j71BjUy51covIlryQPTy9ERa+zr aeF3fW0GvW4AAAGHabwEdgAABAMARjBEAiBVJb5q9iroQawbd08HeJTfoy8f/Lgt CjURuJH3Cn8ufAIgfu1JkkE1zeDgoB1/4P6lkvcTn2BixDBvBjjrJPZA8s0wDQYJ KoZIhvcNAQELBQADggEBAFfVYUAaswGnP/2msIz1gm3EMVOPnFvWaOyYDrQfh6sf ce1SoBSikbi65AUBTocogX1Zx0RpqRQ2oVCGqG95tUTMoOqpfJBSzrIzvL/4Rgan Q9Xw/pVTkYjD0u1k0kvImDXiA5Dv+mu1Dsa93tajvB5ZUoNkI48Zj/XZRQJtmiGj JDtz/Am+isMXVjuYjJCe23HcHqk4tNipNhPAdAk41/jqPBIuLFuStKGVe2RSBqg8 iJoxxZRadScOx+3Dosai8AVCdDgd+Gh6PFnDZFNSowbN3mMYb9dfyXzJ5b7E42+l WIqr+bRPm2L668uLARaSUL4vc7YiKZOB+g53irwMLJY= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyjRLSCB1MVPx3GMrScs8 i3fRz1fvjRmWdOESfgnQ+tq5IOKD+mbQERgj6W3LdF44vPU5MSW8UZsd0QykD4mr SmtJrvvNN9LcZAywrnvNCjvOFkoVZzxsrG/HfbC63PniiMNbAyB2fzyWqk2FGtew Y4YO3zSriJtzz0EE6jb4KGeQAgE2wZRyDy50nH9h1gx5cWHg9ZfvMqSYmwWke+ry qytO8vg2Nzqp/23MZ28kwYVwXQgtFupn+1fCLIjEFJWxdEe6ZfGbgGXupokomOD1 fBZJEZi9b9JmoaZl6MLDC7GP2oGTIJbxSf+ieK676MKlE86HG42Ny2bPu+iAp4T1 iwIDAQAB -----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 401989552177545563027567538532934258887846 . . . . . . . . [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 2023-04-10 04:55:42 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-07-09 04:55:41 +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 'safety.eng.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 25525924769825138988733579557502936541685319491569412527886899498630780850963242220217597345166791738018699728312601901408294833716055234165916594639061017426816362996354794838110415888990603315472959005606285766533331831599203825138527003477910531450683924610738143206144816483139285261362066468748316102833526766381512217402777165312814275138744315945974041642287519760352459777309981438373978364991629161030925878368267376345020428034761682294367612392826330509533361780145939930624499210792997755882756150050926384323126968477642790401101143068966442762947011498913849393870649982440947029061784705768158080071051 . . . . . . . . . . . . . . . . . . . . [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) 67349bbe360a7ceaa3a7c0a55f4d2ba5df97afab . . . . . . . . . . . . . . . . [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 (24 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'safety.eng.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 (243 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes) 00ee007500b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb4990000018769bc046e000004030046304402200ff9f2e82d04a713b35e4f42fcebcd7c54b2261471aeaf40b61ac152b7410623022039a4c5218d3e012a8db2a8a05e0b66315eb255fd6ff73039ae8eac1889cb7c25007500e83ed0da3ef5063532e75728bc896bc903d3cbd1116beceb69e1777d6d06bd6e0000018769bc0476000004030046304402205525be6af62ae841ac1b774f077894dfa32f1ffcb82d0a3511b891f70a7f2e7c02207eed49924135cde0e0a01d7fe0fea592f7139f6062c4306f0638eb24f640f2cd . . . . [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) 0057d561401ab301a73ffda6b08cf5826dc431538f9c5bd668ec980eb41f87ab1f71ed52a014a291b8bae405014e8728817d59c74469a91436a15086a86f79b544cca0eaa97c9052ceb233bcbff84606a743d5f0fe95539188c3d2ed64d24bc89835e20390effa6bb50ec6bdded6a3bc1e59528364238f198ff5d945026d9a21a3243b73fc09be8ac317563b988c909edb71dc1ea938b4d8a93613c0740938d7f8ea3c122e2c5b92b4a1957b645206a83c889a31c5945a75270ec7edc3a2c6a2f0054274381df8687a3c59c3645352a306cdde63186fd75fc97cc9e5bec4e36fa5588aabf9b44f9b62faebcb8b01169250be2f73b622299381fa0e778abc0c2c96