www.designsforlearning.nu

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:21:ab:02:6a:7c:97:56:1a:70:08:cf:75:d9:8f:8f:d1:fd was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. 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.designsforlearning.nu

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:21:ab:02:6a:7c:97:56:1a:70:08:cf:75:d9:8f:8f:d1:fd
Serial Number (int): 272793486435351193385882420131157492355581
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 53:b7:e1:45:1e:dc:b9:72:0a:89:d3:90:3a:75:73:1e:76:bd:cf:70
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 8b:01:59:49:7f:a5:82:96:ea:c3:0e:e2:18:a0:6e:e0:dc:3f:ac:e7
Fingerprint (sha256): 0e:ba:51:65:25:6e:8f:10:a8:90:9c:40:28:11:ee:00:30:ef:e8:60:da:a7:8a:8d:2c:6a:5b:95:4e:e2:8a:99

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.designsforlearning.nu

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.designsforlearning.nu

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

dfl.ubiquitypress.com
www.designsforlearning.nu

Other certificates including the domain name designsforlearning.nu

(limited to 100 certificates)
www.designsforlearning.nu
www.designsforlearning.nu
www.designsforlearning.nu
www.designsforlearning.nu
www.designsforlearning.nu
www.designsforlearning.nu
dfl.ubiquitypress.com
www.designsforlearning.nu
www.designsforlearning.nu
www.designsforlearning.nu
www.designsforlearning.nu
www.designsforlearning.nu
designsforlearning.nu
designsforlearning.nu
designsforlearning.nu
www.designsforlearning.nu

Certificate

The complete raw certificate details for www.designsforlearning.nu in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqMhrzt6NOz7E+yGClPd3
pyrp1q4C/aO4pwtZ7/bH+eIOCcynnZJYlQYinJzjQmrHZNiMzXsX7IiAyYFXOVLv
kIj5QD6USVYn7y0MPS4w6cD9dG58SjlDOEKq/89ApoEGEtQhL+kTY5SKsPO4myOy
MwD0NGFWACoGgvz42DqqNZUJbPUIExbc8tJLD/CdlliKLGd66SuLFUdRtn750Cpw
nk2eyV367+RZVRN1OchSsZA4hJ8bs+AefEmEDJk90G99pGO3P2EQdiuvyUL4JaAL
O78HTtqBCVTdkyYalQPTXrOrgQBBmxGXLyZGUhreZ59NP5aufMg2z097+Y75ITMx
5QIDAQAB
-----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 272793486435351193385882420131157492355581
 . . . . . . . . [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 2019-05-02 15:48:33 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-07-31 15:48:33 +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.designsforlearning.nu'
 . . . . . . . . [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 21306866574690432333802417876552027734551442525928372867667866909728350269340308117879892119064993398604191882951517287527894355988340144144421881702501437279165685673083294604278669607862187743509008067964793772294330020233163616176310761765784826412414792139860098102067486180293183646653662912480756416898515681116685951293990769486621037693171258574991459278403703405923104518559638878940688525320884461405978258403441746339812139853693366296315747187689286480725222330214618401045465288621981431404670154645271185487190406995274654345007652865206940505432426480514609694676497934588397998199174824152825672708581
 . . . . . . . . . . . . . . . . . . . . [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)
							53b7e1451edcb9720a89d3903a75731e76bdcf70
 . . . . . . . . . . . . . . . . [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 (52 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'dfl.ubiquitypress.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.designsforlearning.nu'
 . . . . . . . . . . . . . . . . [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)
							00f0007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016a797294650000040300473045022051e3a32f34e0f7ade4dc484274ead1b029f9563df71342e711c615b1e720cfbe022100c2aabe1896298e4bf03d94149f5b26d77eab091f83117ce16eb909ba288c9bd0007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016a797294680000040300473045022100feae84e57df5f089c728c25ac8eea9a94a525b069ba9bcbea04117ef22f8837802201841b044911690407d2d0daf3ee4e6f0217ad78d263bc331b2a404a6b42774d9
 . . . . [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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