led.kmi.open.ac.uk
Issued by R3
About this certificate
This digital certificate with serial number 04:72:09:38:55:66:ee:6b:66:9e:69:95:75:ce:8f:78:63:6b 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=led.kmi.open.ac.uk
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:72:09:38:55:66:ee:6b:66:9e:69:95:75:ce:8f:78:63:6bSerial Number (int): 387253589108773989773374337523450681779051
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: a1:71:44:3e:76:a8:a3:11:d2:36:fb:82:f7:48:68:3d:fd:e1:cd:1c
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): af:8b:db:b2:42:bd:5f:02:94:b1:3a:ea:c8:0a:da:7f:a7:07:ce:e4
Fingerprint (sha256): 08:b7:07:41:a8:d5:f0:65:5b:0d:5b:25:35:5f:29:e8:78:bd:30:26:84:73:5b:0c:cf:1a:f6:a8:c0:a9:4d:50
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate led.kmi.open.ac.uk
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for led.kmi.open.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
led.kmi.open.ac.uk
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Certificate
The complete raw certificate details for led.kmi.open.ac.uk in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFKzCCBBOgAwIBAgISBHIJOFVm7mtmnmmVdc6PeGNrMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yMzAzMTgyMzI0MjJaFw0yMzA2MTYyMzI0MjFaMB0xGzAZBgNVBAMT EmxlZC5rbWkub3Blbi5hYy51azCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoC ggEBAMONmm6EQir9fbORR+wpZT1eSEFdjksYs6ggoxQWzjnWPRBYp8qxZzqm+5ax pasygQfqvp7m9p1qIrW+DDeudupMhcXyqwD2rsNWp1DrPfpPlRJFt4yE8qfozN6R 1FT2Rlc6gpbwf8RaLIcZK2xeQ9itk57g5kebU41TwUq88ozctWRHOJry7JtqR85W +TMaO2lxPWR6/J+xJY6AkfRiLSElyM4EIeq/PnxvL7LRbIy+YKlpH4HNbQ3uT1s4 P0uVVM/CZrZ2dSrklvN7l+g2Aj8RHSHDMc3kUUbPiBWO+OPmLZIsvRKWljraONvx fpdu/SxpvpVnAAbTQroxHT20pQ8CAwEAAaOCAk4wggJKMA4GA1UdDwEB/wQEAwIF oDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAd BgNVHQ4EFgQUoXFEPnaooxHSNvuC90hoPf3hzRwwHwYDVR0jBBgwFoAUFC6zF7dY VsuuUAlA5h+vnYsUwsYwVQYIKwYBBQUHAQEESTBHMCEGCCsGAQUFBzABhhVodHRw Oi8vcjMuby5sZW5jci5vcmcwIgYIKwYBBQUHMAKGFmh0dHA6Ly9yMy5pLmxlbmNy Lm9yZy8wHQYDVR0RBBYwFIISbGVkLmttaS5vcGVuLmFjLnVrMEwGA1UdIARFMEMw CAYGZ4EMAQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9j cHMubGV0c2VuY3J5cHQub3JnMIIBBQYKKwYBBAHWeQIEAgSB9gSB8wDxAHcAtz77 JN+cTbp18jnFulj0bF38Qs96nzXEnh0JgSXttJkAAAGG90DGmQAABAMASDBGAiEA ronZLDsdO990iMKke/z8rMqKdbAgiSj4JD7m9HASRHsCIQD7oNSqDbcFCSbntJtT cpyhkz/uBrdgwyOqF/mRKWVEmgB2AK33vvp8/xDIi509nB4+GGq0Zyldz7EMJMqF hjTr3IKKAAABhvdAxr8AAAQDAEcwRQIgaqXSOXV+RFxqJNpACIATMLKNCp5qB9tS BkTFDRcmuA4CIQCaMn/BD322oiILP16kVYcA35Ki+K+MkDPxcW8cFNK27jANBgkq hkiG9w0BAQsFAAOCAQEATytprmRt5jYwMpEF1nRdldXebjBEsA8I7YmRRWyEWGgd JPZKpm11SeNTnlSZPJU77Rlyuj8euVVba3jSEksBNI594j5txbniyl3ebc2Br/EE VrniFwLPpkVS4ODnRX5ygUE/OIf1nBsCNPZ1BAsXXnyWpsLUe7FQgHduj1INensf Ab83R4nb5Ay1j2P0fUwU7DQXOr79z9p7UNI+6dIittsCbkoFrerM9ZEuk+DcstZ9 e0Y6yXtgtH3Xou2cAC0K617QMy3irh4RjwYJYQpnjJXLmU03ayQWameR5UCa35xT KLGTdgDUibirs1fcmEZYodeivskuP+r23Guy2+nsZw== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAw42aboRCKv19s5FH7Cll PV5IQV2OSxizqCCjFBbOOdY9EFinyrFnOqb7lrGlqzKBB+q+nub2nWoitb4MN652 6kyFxfKrAPauw1anUOs9+k+VEkW3jITyp+jM3pHUVPZGVzqClvB/xFoshxkrbF5D 2K2TnuDmR5tTjVPBSrzyjNy1ZEc4mvLsm2pHzlb5Mxo7aXE9ZHr8n7EljoCR9GIt ISXIzgQh6r8+fG8vstFsjL5gqWkfgc1tDe5PWzg/S5VUz8JmtnZ1KuSW83uX6DYC PxEdIcMxzeRRRs+IFY744+Ytkiy9EpaWOto42/F+l279LGm+lWcABtNCujEdPbSl DwIDAQAB -----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 387253589108773989773374337523450681779051 . . . . . . . . [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 2023-03-18 23:24:22 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-06-16 23:24:21 +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 'led.kmi.open.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 24686296632883435240738355733883272510286730788686576577501485335360437538100747298581098002588862017740225387898557262680978709962333851129846115986163765336504498801079014064651677282660431687658335505453504765046381736426683937541645724844995164840603887191286741439108061741367309804118031341923613274926627948440274748682694450594667810260770786884916990932267404155425407050306599411446937147821268710405773468850043131994183170433984402874644226437801861961381916939466795336648585662893402785240860859246661364758472146869241629568298519458749378632436096897259378619994617966600147143729377302377846470386959 . . . . . . . . . . . . . . . . . . . . [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) a171443e76a8a311d236fb82f748683dfde1cd1c . . . . . . . . . . . . . . . . [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 (22 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'led.kmi.open.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) 00f1007700b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb49900000186f740c6990000040300483046022100ae89d92c3b1d3bdf7488c2a47bfcfcacca8a75b0208928f8243ee6f47012447b022100fba0d4aa0db7050926e7b49b53729ca1933fee06b760c323aa17f9912965449a007600adf7befa7cff10c88b9d3d9c1e3e186ab467295dcfb10c24ca858634ebdc828a00000186f740c6bf000004030047304502206aa5d239757e445c6a24da4008801330b28d0a9e6a07db520644c50d1726b80e0221009a327fc10f7db6a2220b3f5ea4558700df92a2f8af8c9033f1716f1c14d2b6ee . . . . [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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