learn.libf.ac.uk

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:57:0f:07:4b:7c:33:28:9a:91:dd:ce:8d:66:f6:1d:3b:41 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): 03:57:0f:07:4b:7c:33:28:9a:91:dd:ce:8d:66:f6:1d:3b:41
Serial Number (int): 290961400014438014991185178135069766531905
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: b2:8a:cd:62:83:87:60:1a:c3:6c:1d:68:f3:dd:29:62:b8:49:1e:82
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 3b:87:b0:5f:81:06:2a:d1:bb:23:b8:20:2b:11:d4:40:09:dc:6a:74
Fingerprint (sha256): d9:cb:27:03:ca:e2:8d:a2:4e:d8:3d:e1:08:c6:bf:2f:ef:8e:81:b8:73:e6:5a:fe:6b:da:04:fd:cb:39:64:93

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 290961400014438014991185178135069766531905
 . . . . . . . . [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 2020-03-24 22:28:09 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-06-22 22:28:09 +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 3074788662887206350644015720805040184584217517869532420717013064645728034784215981068715991784463686676368808413384812995186682496928016846409137866137369156269997626192791382990051864083811750765770230302061160256433505587218871389401925898456430961398957779303646769732047042279378902670206077001111547551754328201942338011153544515150848793861592288070576817533899671045469658444665446895241306930060229526084053062862240575194143395655839126022730033290233130057939349762652152917192359327065996445839802426261480382209637331957683215317336972027985900570455744356839422053773417531276515244678249708342020013382886372358703567533291046352618433264453951156959039859441901862224969529468807160144406495153293601181030107231934832582015895670318849628711341150344063974273151766119482031526700993355907284443591016976608691782635519835484311476680406650634003658125359203496361050258743069035788689089388320566587788144911
 . . . . . . . . . . . . . . . . . . . . [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)
							b28acd628387601ac36c1d68f3dd2962b8491e82
 . . . . . . . . . . . . . . . . [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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007600f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb273000001710edfefe10000040300473045022100f60b5e90f8b93f54a15653d13dc4720a7fee2d795926e5fcff48b0d34c64884802204280400a0bd7eb7e3af0102954fef14f46668ec8b063c2f284dac5589751e0a600770007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c000001710edff0040000040300483046022100d70565514a24d548e488d9a6cc2e0bf496ed6f2191e19fad3c5997c9a01d79a4022100d26331d8c3ba7a87d609beb0f4274b668208d767f0380057fe877c248959bda8
 . . . . [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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