www.thandie.org

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:47:73:43:93:8a:2f:ad:6e:10:21:28:44:be:7b:20:db:01 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.thandie.org

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:47:73:43:93:8a:2f:ad:6e:10:21:28:44:be:7b:20:db:01
Serial Number (int): 285650117942534611627756622703699666459393
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 9f:a8:22:14:26:45:53:f1:5a:d6:fe:d6:24:77:5e:44:85:56:a0:9a
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 69:06:f8:cf:ce:b0:20:61:37:74:e7:19:f0:3b:eb:2f:23:da:53:f7
Fingerprint (sha256): 12:2f:0e:ee:8d:dc:cf:17:20:a8:8d:a5:c3:b4:42:da:da:af:52:5e:14:1a:bb:17:20:97:e9:94:5b:2e:9a:0f

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.thandie.org

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.thandie.org

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

9 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

www.thandie.org

Other certificates including the domain name thandie.org

(limited to 100 certificates)
www.thandie.org
thandie.org
thandie.org
thandie.org
thandie.org
thandie.org
www.thandie.org
www.thandie.org
thandie.org
www.thandie.org
thandie.org
thandie.org
thandie.org
www.thandie.org
www.thandie.org

Certificate

The complete raw certificate details for www.thandie.org 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 285650117942534611627756622703699666459393
 . . . . . . . . [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 2019-05-28 21:33:19 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-08-26 21:33:19 +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.thandie.org'
 . . . . . . . . [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 829842685329539994579919857579855970629135338866332622118489160580370945206786170992853954196893186817766684981384239811486801323074115006004912893923647475984004739477499587160436348101626480816539684196818003240882905763031689254307617456443618579237933407645241126166628783030826838007547635611535323443539234871171951153633488525616813794187846037937368510554787424583340065357965323120859566405547274678010546436930834161775308904005695039676987578026350148123752960837812758754396069761588579023658181434297490954527295659866727550920378195913531697689935795783604171695483016508155317315799380656616274351973705145147939792072726624795216114673675672137250153660241003912787468658795980131627184568044367341536897362242727736290693803304490824488862166864888767247582754821981587658716224620967155665685702087280783606489731043717549344679921800775441092532742350294394312934487709414010736905259328693931370656878743991388585465919152365241041939189554878965483131270328142031848236766363059125994431470297953477550202466183766694686955574622629697149416458977349140717732588743888427715511975966998696571186471016979583857499404735551354012609733065429023578365105656403012236834860507080089261068180376790778206100657125401
 . . . . . . . . . . . . . . . . . . . . [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)
							9fa82214264553f15ad6fed624775e448556a09a
 . . . . . . . . . . . . . . . . [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 (19 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.thandie.org'
 . . . . . . . . . . . . . . . . [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)
							00ef007600747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016b0093929c0000040300473045022009a8d69450d09915c68f9ae1d0a111aff89cb8c40fbb13c5f49097a8326862ec022100e45c0ad0828e376dee2c0ae3a3f016efc7ee4e7b5857318bc341becbe1d4df3700750063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016b009392ba0000040300463044022006a230a2594baac700936d4770f4fe599c81d711bf0e093b063b53589994335f02207e6693e432c8ef337cd704a20ddaa14251b55f310c8b4ab79f8b44f841804ff1
 . . . . [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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