learn.libf.ac.uk

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:73:81:ee:88:14:42:ea:f8:32:03:66:47:dd:3f:b3:01:94 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=learn.libf.ac.uk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:73:81:ee:88:14:42:ea:f8:32:03:66:47:dd:3f:b3:01:94
Serial Number (int): 300642038929310228093011892655216431137172
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 1a:95:31:76:fc:5b:ee:91:5b:cd:71:63:59:34:fa:18:99:2a:ca:32
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): e6:57:ba:26:9a:38:19:f1:f0:7a:f9:37:e4:7f:28:fe:fe:17:f3:b7
Fingerprint (sha256): 26:36:ec:de:17:54:09:6a:d1:83:96:43:f4:e8:6d:9f:2c:f5:f0:af:b1:6a:b9:fc:f9:5e:30:6e:d6:28:a4:9d

Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x3.letsencrypt.org

Check the revocation status for certificate learn.libf.ac.uk

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for learn.libf.ac.uk

Public Key Algorithm

RSA

Key Size

3072

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

learn.libf.ac.uk

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Certificate

The complete raw certificate details for learn.libf.ac.uk in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----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-----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 300642038929310228093011892655216431137172
 . . . . . . . . [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 2020-02-06 13:38:38 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-05-06 13:38:38 +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 'learn.libf.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 (3184 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 2920909168031944219326253089727287478694976968859847247158825256243779485624323771110880715299195732777486899352875005627079751408905569641520318439393371723610624705599944664413593646049177818970474032218362282088163333561657338316572426062110483246734559212584180023791112114105254110723324681701013007097791498262972548799770403121778148808308144944245042909492673262354414615426797222824406729690940709997108087950990163837436358967602745104927455351939359664460615135922337844103312958936952193340253016770214668712106223343813352628708178767444448561633820052860171049411099124396593428998805019497086913953421189135923158784083979900174132524510498997551720936093514896854217059230432032104166494213164374158763761588324457730639075612192857805550045808547626226770720391385578010034168077949821550104653995823149555229807990582674035878923820693582361835666627985781364280567361568368402340980438201130330163516861619
 . . . . . . . . . . . . . . . . . . . . [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)
							1a953176fc5bee915bcd71635934fa18992aca32
 . . . . . . . . . . . . . . . . [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 'learn.libf.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 (247 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes)
							00f2007700f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb273000001701af0423e0000040300483046022100cf4d6692287709636ff99887d4cd143bb7cc6399474cb4f24cef4bd92187f0680221008cb88dc216567718ce987ecfc13bba0636cd824fa27bc0f7f74ba311618eedb100770007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c000001701af0426a000004030048304602210088bb14f78635b38f6f15fa7cef347c53d0eabad91f464c58754ed44eaeca00ea022100f649ee31e3fe5bbc90e135f39a6a0e0dae9258c13a9a71f404ef734544c68596
 . . . . [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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