learn.libf.ac.uk

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:82:f4:80:e9:81:c3:1d:ae:4d:36:3f:e0:ef:6d:3a:08:15 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): 03:82:f4:80:e9:81:c3:1d:ae:4d:36:3f:e0:ef:6d:3a:08:15
Serial Number (int): 305898566476054408195094694145204934019093
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 89:59:c5:2a:ea:7d:64:8d:ad:97:53:4a:e2:a2:2a:f6:d9:7e:a7:ff
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): a3:af:d4:9e:fa:f9:58:62:b5:ca:a7:15:b6:70:6c:1a:99:85:3a:b6
Fingerprint (sha256): d6:85:62:d4:2c:e4:f9:d1:e0:af:90:92:67:45:42:17:70:fb:2f:5f:1d:98:c1:43:22:4b:62:44:3c:f8:da:eb

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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fia.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 305898566476054408195094694145204934019093
 . . . . . . . . [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 13:26:14 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-05-06 13:26:14 +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 3467646334356874318088894101991377163831341019534905384047005572457828294062766692553866972518991960219448610781003749060804175598593736475499055650820170929478366222399959716008932140956802197408271883202327186568793794965872714571658257116922063326772353471656374063942427128020894855949221949579110748339028283007171006269491713879707752349010810217483968012668124617975389738249743075217240756425948904611179801352941319425067161387057829807556983417226607129115097746157847124672802439658801527159951521400934408879323513415023285761016284480981805793077795406116204379079299232641130234958919586353648596594608959434015896579224023125048778094150185832265897679525705571063873793980170896147698413691235347660041476071794377336041188288656108476333090525936869765722782985600620879388460118501617176210841551681860775163343335128646499403303898130281867025939165259979583108723222251410593953884937445033719035965142783
 . . . . . . . . . . . . . . . . . . . . [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)
							8959c52aea7d648dad97534ae2a22af6d97ea7ff
 . . . . . . . . . . . . . . . . [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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007600f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb273000001701ae4e7c1000004030047304502210087cdb32d56a2a7ac6f71284a8adcde1c976352af5d0ce8ac180adfd86f5919e902206b8ce5b88b70e072905d9ebf9bddf8afb9a0412aae28f8da2a14ec54c0899c0f00750007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c000001701ae4e80f0000040300463044022079ed907dc78c5d64febfad24c782716e1b27a33342c055c86658681930bd0551022026730c69f35aca443e31304f87ae190e2ad98771e42c97a2c7bf31caa133a93f
 . . . . [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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