mentoring.kcl.ac.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 04:b5:b6:71:2e:53:6b:f3:64:e7:ca:3c:39:55:f3:37:57:9f 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=mentoring.kcl.ac.uk
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:b5:b6:71:2e:53:6b:f3:64:e7:ca:3c:39:55:f3:37:57:9fSerial Number (int): 410282759304108905995955167338944638965663
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: b7:5f:00:7b:eb:54:1f:c6:56:56:1f:e6:0c:cc:8d:25:e9:ec:a9:1c
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 2f:9c:83:f5:34:d3:65:9b:6b:32:f8:4b:d7:31:c9:d2:0e:df:76:b2
Fingerprint (sha256): 07:b9:07:6b:6c:2b:f4:e9:68:1c:ee:a1:d5:a0:e2:86:6f:08:35:e0:11:fe:55:b7:f4:b1:0b:c6:e7:46:08:9c
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate mentoring.kcl.ac.uk
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for mentoring.kcl.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
mentoring.kcl.ac.uk
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Certificate
The complete raw certificate details for mentoring.kcl.ac.uk in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFXjCCBEagAwIBAgISBLW2cS5Ta/Nk58o8OVXzN1efMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODExMTgyMzA1MjJaFw0x OTAyMTYyMzA1MjJaMB4xHDAaBgNVBAMTE21lbnRvcmluZy5rY2wuYWMudWswggEi MA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCxqgztM8zs3OhRGwG3vklwBAUU 19ZxJlGquklStkzRH7+DarDsUFWttw0bsFacyit3KEw9wbnJXDBU+D8/MM5ifLMA T0p0gSLrFv+J6pb38S7g45zVeCCu9Mm0HgO55/FxjNCkTSSdmh4tNM+R4+XQhLSr IMpf7nwD3UxhQqlHQCw+qD51txdtWTLcJjOcVfAwgwm9xAoLcz8sbQ5q9k43FPmI K3k97cfeRcI2M7IGegiWJV/1Undh2vOF2z3IkkbDvThvzxzT64SdXutHFZjmZnGx wunmuBIOMllrDaZ+o5DT1V+1APChItYds1xuL52rDdMn6flafmWLmGO5Ts0HAgMB AAGjggJoMIICZDAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEG CCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFLdfAHvrVB/GVlYf5gzM jSXp7KkcMB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsGAQUF BwEBBGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNlbmNy eXB0Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNlbmNy eXB0Lm9yZy8wHgYDVR0RBBcwFYITbWVudG9yaW5nLmtjbC5hYy51azBMBgNVHSAE RTBDMAgGBmeBDAECATA3BgsrBgEEAYLfEwEBATAoMCYGCCsGAQUFBwIBFhpodHRw Oi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCCAQQGCisGAQQB1nkCBAIEgfUEgfIA8AB2 AOJpS64m6OlACeiGG7Y7g9Q+5/50iPukjyiTAZ3d8dv+AAABZylJNZIAAAQDAEcw RQIhALHAG0qweHXUbof6uLLNu/fMWJttasb6Op/7m1C4mkA+AiAd9Ax/y8LzxFAz 1j7W/Zz2lJ5JEIg+4YRsi8/rEhlHqQB2ACk8UZZUyDlluqpQ/FgH1Ldvv1h6KXLc pMMM9OVFR/R4AAABZylJN38AAAQDAEcwRQIgb76GTQEt7lDH6W26KXGxZCeqBu9r U+lPIcUqhAlqY2cCIQDKPWSJ36uURR7gQguFUOAGRWSw3AYW1BtjIfas5MhTRjAN BgkqhkiG9w0BAQsFAAOCAQEAlkgHPIY0fvhkKihNEpXE5vuWoCClzWtcodN2BcCH k/NKkFwejdt51uQ+JGxo02bQY0B8AvjeQsk+e9Xd5jDrgwG3Y586EDs23x54M0t2 HjHMjrViMJrPO6GymXKcjFYHg/qEdbNAIxPe8UDIR2CdTmUy4MkHYMKujesiRiXi x7Zl8OOBF0/jY0F1iCfOWjJN8WWeh8eMKIBdTXX+/lFW2WwrKWHRe40Z7PVvCxXu fRE/ntxsXiWRSpgo7aEa0h33bO7Lb1EfIfbGQrp2I/s6lkXplM0MRQMklCpRSc6D YfV+fEHeyzlmixg4NFMy67wwkw4WRap1cxc+nLs79RIQfQ== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsaoM7TPM7NzoURsBt75J cAQFFNfWcSZRqrpJUrZM0R+/g2qw7FBVrbcNG7BWnMordyhMPcG5yVwwVPg/PzDO YnyzAE9KdIEi6xb/ieqW9/Eu4OOc1XggrvTJtB4DuefxcYzQpE0knZoeLTTPkePl 0IS0qyDKX+58A91MYUKpR0AsPqg+dbcXbVky3CYznFXwMIMJvcQKC3M/LG0OavZO NxT5iCt5Pe3H3kXCNjOyBnoIliVf9VJ3Ydrzhds9yJJGw704b88c0+uEnV7rRxWY 5mZxscLp5rgSDjJZaw2mfqOQ09VftQDwoSLWHbNcbi+dqw3TJ+n5Wn5li5hjuU7N BwIDAQAB -----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 410282759304108905995955167338944638965663 . . . . . . . . [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 2018-11-18 23:05:22 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-02-16 23:05:22 +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 'mentoring.kcl.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 22428035003110701911415708589662401226264616709248526924435714005421375785505028233916609560120772493784910398822403247416575418803851235055524089664885389211499293424888957745075804415992981734802254464026905653919497693454099651783469886866783768660261333770566534218440679541312895851019537934529083386275102174005937988876444689834513748346721645350391028820223984848849482192497797196957090673305411752705996972913244135378814244433183385865255182285803962671199525185332549621700702703539109665808887693294862395007628887286163305975646891224101158633698922223119787466669992855370385740362412709419748770630919 . . . . . . . . . . . . . . . . . . . . [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) b75f007beb541fc656561fe60ccc8d25e9eca91c . . . . . . . . . . . . . . . . [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 (23 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mentoring.kcl.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 (245 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes) 00f0007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe00000167294935920000040300473045022100b1c01b4ab07875d46e87fab8b2cdbbf7cc589b6d6ac6fa3a9ffb9b50b89a403e02201df40c7fcbc2f3c45033d63ed6fd9cf6949e4910883ee1846c8bcfeb121947a9007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f478000001672949377f000004030047304502206fbe864d012dee50c7e96dba2971b16427aa06ef6b53e94f21c52a84096a6367022100ca3d6489dfab94451ee0420b8550e0064564b0dc0616d41b6321f6ace4c85346 . . . . [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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