www.designsforlearning.nu

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:7a:9d:80:eb:20:a5:02:10:fa:60:88:bb:5c:c8:dd:f9:15 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=www.designsforlearning.nu

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:7a:9d:80:eb:20:a5:02:10:fa:60:88:bb:5c:c8:dd:f9:15
Serial Number (int): 303060664737923982315633425582436625807637
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 93:3b:75:d4:d7:cc:0f:76:f8:2d:0c:42:b9:54:96:f4:fc:85:b3:b9
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): b3:07:69:9e:36:13:be:46:ed:17:d9:c3:48:34:27:3e:ae:0d:43:b4
Fingerprint (sha256): a3:db:78:fa:e8:c5:7b:08:9b:93:ac:34:33:17:cf:1d:0e:08:bf:94:b7:31:90:2e:7f:0f:55:80:f8:e1:6b:8c

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

1

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

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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0PtcjrQVIh7+EB3C03aO
jPb0dnOnaVDEnXuqDccl81XxO3VKF01TDl0gUvG1DoamYCUdgfnKopbFtlPXR+S4
b82nAJvCSd4Rs/6nyXpWVP4gOLPMtCU4ATkDfftgIeVjzIBXjCZxvQDswCj7pK2q
dg42LfMGjhOQ0rLBPIQnvOSPUEdAiTjK54YOzeAf5Nvh45zfuWUZadWYiyi6bdjM
p7yR1ZLyKawiM79/mXd48H4r05nM2hKpw9iFiEDNOFgVEsA2a/Bw4J9eScV4APgt
lA2u4Ino2QK3p+VBP7LlOMsFPJROcMV/IMhZ+wiC8NGmxsedSQCCijcJY308pn7+
9QIDAQAB
-----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 303060664737923982315633425582436625807637
 . . . . . . . . [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 2019-12-28 13:25:50 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-27 13:25:50 +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 26381518434186052215227955483176666465178243125073057120330175248780209954180238464254157628707841326240863404868650717844742826466742936923550673149841204875432296610926153084796652483329070147497379711900970693822600289365388620516630366253494332117400782784489031154049024741091334830255395823743215896718779443055651014954631378568711900326956348319936363122647441666917391966455076008639198577527076639585017317165820451695710692126090786019149467151750528057966842251326049341758442639087906815388763860805224722095879315892289190770253256771642728223933021021812836520080680730255263196502327493414518463069941
 . . . . . . . . . . . . . . . . . . . . [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)
							933b75d4d7cc0f76f82d0c42b95496f4fc85b3b9
 . . . . . . . . . . . . . . . . [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 (29 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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)
							00f00076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016f4ce62bf00000040300473045022100820266b508f3a3a5e92fd4cbddbcc8da33f3ceb4e0b48a6bd7f9340919f2ea2d0220301b74786dd457e99c6775d7259d03a37129d59f33daafba386873a260eaea9e00760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016f4ce62bec00000403004730450220728d940dc3760dc7e10321aacc347e7633077373d7e11bd905aa7f7741dca16c022100dbd66e2d84ffa6bdbc9823e58dffe45a51a7af0ac447685154bd77d0c1227dff
 . . . . [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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