www.hi-seal.co.uk

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:28:d5:40:9c:20:a6:8c:e3:f1:e1:5d:3c:48:fa:e2:57:1c 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=www.hi-seal.co.uk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:28:d5:40:9c:20:a6:8c:e3:f1:e1:5d:3c:48:fa:e2:57:1c
Serial Number (int): 275231613508862155996104650064019855660828
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: f0:5f:aa:b5:80:1f:b0:a7:60:3a:25:7a:e4:64:94:8b:1a:8c:5b:8a
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): ec:8d:ed:e5:8d:92:6e:eb:63:fc:bb:ad:43:d6:0c:a9:18:0d:0e:8a
Fingerprint (sha256): 00:0c:f8:5b:f6:8f:a5:f7:ed:0a:95:b8:35:3a:34:7b:29:b0:f2:22:30:ef:29:b9:f4:6f:84:d4:b6:d3:b9:8a

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 www.hi-seal.co.uk

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.hi-seal.co.uk

Public Key Algorithm

RSA

Key Size

4096

Signature Algorithm

SHA256 with RSA

Key Usage

Digital Signature
Key Encipherment

Extended Key Usages

Server Authentication
Client Authentication

Extensions

8 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

www.hi-seal.co.uk

Other certificates including the domain name hi-seal.co.uk

(limited to 100 certificates)
www.hi-seal.co.uk
hi-seal.co.uk
hi-seal.co.uk
hi-seal.co.uk
www.hi-seal.co.uk
www.hi-seal.co.uk
www.hi-seal.co.uk
www.hi-seal.co.uk
hi-seal.co.uk
www.hi-seal.co.uk
hi-seal.co.uk
www.hi-seal.co.uk
www.hi-seal.co.uk
hi-seal.co.uk
hi-seal.co.uk
www.hi-seal.co.uk
www.hi-seal.co.uk
www.hi-seal.co.uk
www.hi-seal.co.uk
hi-seal.co.uk
www.hi-seal.co.uk
www.hi-seal.co.uk

Certificate

The complete raw certificate details for www.hi-seal.co.uk in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIGBTCCBO2gAwIBAgISAyjVQJwgpozj8eFdPEj64lccMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODAxMTgxMTAxMjZaFw0x
ODA0MTgxMTAxMjZaMBwxGjAYBgNVBAMTEXd3dy5oaS1zZWFsLmNvLnVrMIICIjAN
BgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAjFNMy0K8seQxDn0iJC7xkT1rqJIf
Bm9Fxb5dStQsx6SeyIhpMFnmJS8IlQdVXwBXz9pwOCzWsxei9IPl2H/45zYbx33x
zizjJXQaZC6OA2DoTixYdpiKFM55D6Zs1cR5eVzgZYQDWZjYpeENH5IRUEPIZmdQ
egZKVZ4NWUi6Z3my3Lp1UtoiVSLZpvX7vbtiOE51iItg8Kgb701jyobDmv+9Nv6h
MibVK5T3bHvmGwVwJ4Spa7nVxT5JWLvl26XNXfggtaDQ1Bw1Q6Ow9/OwilP8rqMY
ML2HcjbPTAicjp+nWxtyaqUzrSSPmBblnEn74eU5ZEbPwWsDIi5fR2ERg0O0sFWf
dlxmk1x4f6KY3cMO1BIRhG2KEvtXAcQL/PdfsFscw3G50UKT+ilJno7YhD21GxaR
fbckASfuNOTFn7QrEDJcXnjWVbn1pN/nRD6cV1+HS+aDqxQMBXVbxCxTEMg0//dL
neEeb6ixN9ZBUkgK85x1dJfuBN38qu8uZJ8cmZt/VykjbO4L6YtCbGK73/3OkVxN
7eqyOEYUU1Vo5RCn/QDBEez8VubHGw+CoY52665Iagmvx8G8be4de4V2isQGIbnn
23Yj4KeZf7boFnU2pDZJO8Gte7xomvC+s97wX9XJiABiZM+SEfiGABjRAP2jNdaL
c+jyLAEckgd236kCAwEAAaOCAhEwggINMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUE
FjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQU
8F+qtYAfsKdgOiV65GSUixqMW4owHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl
7/Oo7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5p
bnQteDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5p
bnQteDMubGV0c2VuY3J5cHQub3JnLzAcBgNVHREEFTATghF3d3cuaGktc2VhbC5j
by51azCB/gYDVR0gBIH2MIHzMAgGBmeBDAECATCB5gYLKwYBBAGC3xMBAQEwgdYw
JgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3JnMIGrBggrBgEF
BQcCAjCBngyBm1RoaXMgQ2VydGlmaWNhdGUgbWF5IG9ubHkgYmUgcmVsaWVkIHVw
b24gYnkgUmVseWluZyBQYXJ0aWVzIGFuZCBvbmx5IGluIGFjY29yZGFuY2Ugd2l0
aCB0aGUgQ2VydGlmaWNhdGUgUG9saWN5IGZvdW5kIGF0IGh0dHBzOi8vbGV0c2Vu
Y3J5cHQub3JnL3JlcG9zaXRvcnkvMA0GCSqGSIb3DQEBCwUAA4IBAQCOJTk7tFRS
NSt9Wr3gViMatcrow+bktGdB+Grtp3+9qbJmMqr3xy4aWP0pUIMnrh6cHZIWlRfR
1xDYTn6av3CvoxT32XHW6gY/qvXUtZ7C26wTDkSea6l1xFiN7PYjLqCUlxGLUZpc
U+ywUEN0zSnJaxN0+l8gWbaF8vRRQidXkGD6Px5YCLI25a+fxIo2yVslY6sqQKvt
fkQ6VNrVl++CQfba2cyJzRfGE1ibK4aaVGIT4yePWMOW5s4bHScfuar/6o3JkrR/
ZAjUhW95klTXNMJKzHX8zVS4pDu8vhQSU9Z5L9Ct8SNzF9HP0cE0/Wqe57uGehgI
oqkshQPRXeud
-----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 275231613508862155996104650064019855660828
 . . . . . . . . [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 2018-01-18 11:01:26 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-04-18 11:01:26 +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 'www.hi-seal.co.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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 572477647081581367315416660344266430452077429026732096061681845831319775736686607876856734167616431104121400695436829121455213478827690422487576014997490182127375832385874429249423983878960306416754372131109542035000178310605410092798828272984196627359504867558695193448376806452965093991878945478969208967380619246675036439461826746255360795172770355793999131925642299542307343269091493215392243996956661677502900125160431909704372470703099380209311656523313677116732518291134429887862143480676133146806197213535851124262042371742627708750759884248013616641982305061195562847872636327782283627399971375994992429801596759023935894434214959721410995467744953223970779007842360322645233532263163416902562430166290017970404913489128334382149899627827818304990988429683904754618562790684662090134966230770624259421107166289944959254150416787184802180912942547876805820443037065592531476058627330807369633574123178993490745985889090964175296502160847640565071777601553569373873283180075430146794116510388795142239807635659443868555005684396119506719068262816737402388194519658084953504311890427363050532803006244898850914878297679831234712062525853424825648205344885516443636187118365514440521687082802024001553615665907203819388796329897
 . . . . . . . . . . . . . . . . . . . . [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)
							f05faab5801fb0a7603a257ae464948b1a8c5b8a
 . . . . . . . . . . . . . . . . [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 (21 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.hi-seal.co.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 (246 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 1.3.6.1.5.5.7.2.2 (unotice)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String 'This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/'
 . . . . [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)
		008e25393bb45452352b7d5abde056231ab5cae8c3e6e4b46741f86aeda77fbda9b26632aaf7c72e1a58fd29508327ae1e9c1d92169517d1d710d84e7e9abf70afa314f7d971d6ea063faaf5d4b59ec2dbac130e449e6ba975c4588decf6232ea09497118b519a5c53ecb0504374cd29c96b1374fa5f2059b685f2f4514227579060fa3f1e5808b236e5af9fc48a36c95b2563ab2a40abed7e443a54dad597ef8241f6dad9cc89cd17c613589b2b869a546213e3278f58c396e6ce1b1d271fb9aaffea8dc992b47f6408d4856f799254d734c24acc75fccd54b8a43bbcbe141253d6792fd0adf1237317d1cfd1c134fd6a9ee7bb867a1808a2a92c8503d15deb9d