leonida.boston

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:8d:13:d3:7e:13:1c:0a:6d:d8:b6:6f:dd:41:cc:7c:d0:0e 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=leonida.boston

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:8d:13:d3:7e:13:1c:0a:6d:d8:b6:6f:dd:41:cc:7c:d0:0e
Serial Number (int): 309343024994787750874572589386019716780046
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 0b:80:f1:58:70:9a:1c:54:31:c2:a6:af:e4:9b:3b:dd:4e:a0:a0:80
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): d5:62:a0:19:72:ea:b2:ca:c3:c2:ef:8d:8a:1c:77:86:af:2f:01:09
Fingerprint (sha256): cb:1b:96:52:cc:fd:7d:28:8c:e6:96:5a:c8:8a:6f:c8:f8:2c:14:db:4d:67:3d:15:2f:cd:91:bb:37:4f:5e:66

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 leonida.boston

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for leonida.boston

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

leonida.boston

Other certificates including the domain name leonida.boston

(limited to 100 certificates)
leonida.boston
www.leonida.boston
leonida.boston
cordoba.boston
leonida.boston
leonida.boston
leonida.boston
percorsiviaggi.com

Certificate

The complete raw certificate details for leonida.boston 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 309343024994787750874572589386019716780046
 . . . . . . . . [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 2019-06-27 02:18:21 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-09-25 02:18:21 +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 'leonida.boston'
 . . . . . . . . [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 942116408350893172429567761271008640170007693495885859733706686622558380720780124505616476876747543812283646429747558415756741688687766780381649010633373352636428650199099209878257273767090238790008631609662799411635893558430357293504706220225901525752263975198855283448889578445812771117276127286050459828833767587974600474739734756224641720474985508090229409653954965504461356529729754092488003121539517821320111215530203563025507348690170578881352173021366637384863448715491913955215902498850580488503745871669609111297466171538273393325608633189912799875959756271254252847739634363854621431116774662122002946786134079895856434295290462465117518937528751551743648858944035444575247894190235967728640583559070074311426076081136385348844451363969798814629447760961837233270513397707588975037970812715861479609574152743479851015015427844218102639790037495113755866358100297760322740471459941668661975432738572007042179402262142339661693783972086448452312832662445333460999779631383802071851671575514732909182014839678980479524612677996937775148598774077245263451049940326966492109401015624418846785334331884616962016222289454997862897383124818143195841675336419771666303923483631654794976109489779075324879575907220526148583682417299
 . . . . . . . . . . . . . . . . . . . . [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)
							0b80f158709a1c5431c2a6afe49b3bdd4ea0a080
 . . . . . . . . . . . . . . . . [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 (18 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'leonida.boston'
 . . . . . . . . . . . . . . . . [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)
							00ef007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016b96f0f2720000040300473045022100bec4e4bd27205f852b0ee51d86a8a544af4a25e8548c9a1fb480e10ee493cbb002200f057bd98e98cfbc0781e0f8f990b26847c6c96fc83f68b2d0866a36b9b58e13007500293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016b96f0f26900000403004630440220132b5455229c3fbccaa37ff58fea008ab0640e8e47688c6803613884b85b5d600220363f5552907f4b5583a13ffbd65f90994045ace3fe199f110d7ef289cd1ae2e2
 . . . . [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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