www.torricellasicura.org

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:ce:d5:18:45:32:17:c7:90:4c:d6:c8:5a:b9:f0:d4:17:2d 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.torricellasicura.org

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:ce:d5:18:45:32:17:c7:90:4c:d6:c8:5a:b9:f0:d4:17:2d
Serial Number (int): 331718276962675885520699136456822776665901
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: ec:3d:61:a6:57:6f:53:1a:7e:2f:23:2e:9f:01:6c:a5:37:dc:aa:9d
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): f8:3a:83:cb:8e:4e:d9:cd:b4:a8:f4:2c:9a:57:39:24:2e:9e:2b:47
Fingerprint (sha256): bd:3d:f9:04:ed:43:ae:1a:84:c5:a8:45:b3:6d:b4:e1:6d:86:13:d2:8d:47:7c:1f:9c:01:ff:a2:a3:fe:d7:cd

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.torricellasicura.org

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.torricellasicura.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.torricellasicura.org

Other certificates including the domain name torricellasicura.org

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.torricellasicura.org in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAnoxitTVPVu6jqMTwSo3B
Go0BVEcj+MzVJ2NVra+elwR/BMJVGsqwDb3R+Hprn4tT5tijiJyu0N69lvCP9jWU
3F4v06747UOeA/3SmdsU1DwJEyiJSYawlTxIiLsu7I7qMwlFtvqdrMw7JuC6mmm+
mH+R1LuAJBeruBWqelH27VpwWECAZFIiB5/dUgpokKdEFeyUVhndK1jj45FXPbbc
pXynWSryXriKULkS6c5r2snUUkp9rVl49K2cIHvjgL28iPjXemK2jTEyXGmXv1M5
kmqKPkuC3ajRiFjXlZhcWUf+YSACgGyTxGjcut0PYrrdQrpOwNtI+PnSgTXq5NeR
5j3iyp1jKKKEXV3fldhV/uDrDBiCaXKDxNT7uk67pYPAayDCOwUT6kmH83nIPQQ6
yNCGIwD8/uD7Jzr3mpJvFACJnkB76zQPD9yQvwCWfVVvD80OMJjjltgWUpSOjZs3
pY4KZummdumPonfKvBC4vXPTq8K09TM5CvWX/5auHX/QnmjeMKl2EqUlIXizxMy6
L63sspGjzdjYInaGfzn8ibpizAXfWqWUYUf2W1vI6FVZoUu3Vq5Uu9FczyxuM34h
xF19MGgtHbsPZ+Wq6DKhxIPes5hctrOZ5nLDUdK2Gur0y3sRCeoH6F+Tlmt8Y+xJ
ujdEIQ4sDtJrJXAEGJvZpJsCAwEAAQ==
-----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 331718276962675885520699136456822776665901
 . . . . . . . . [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 2020-02-04 01:15:34 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-05-04 01:15:34 +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.torricellasicura.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 646820962702485813102713275493719450211481366964228995267593747010302571011918445901066597580976948785773866397334479149769819948681714255033332483351121658555485017560681297011648674872821532188930604848221399204229378736126002893274647801425962798385992243146474398540365935881897681316799030050800712716369442322962020725075314560284541777026239129502971210573724211615518096470690369640608547181783241244035348242535012549655376232056625546286702412477819749425041815323682465762341638506599495799181329918477274145239407735872134310403154143555524331818726402967186693512489685198499134152491772946215518787621208594106046696482790221332465715914030081245341015042482142014596120308560805646070587236707418122479393876948559737442235957436127470892127726490209727150132918396760369737512819705876121353479171971190530767111835154209645771226725622141096599602552922096264548901800881854922530491569076720871308524516259607921105906230153093971937547735506301372712215875805954702098346491876946886597743884036405709677887896046593366955913224036527203423092201492772054557416076335301764751915965463169708331992077600187750375296787997870907442471214394698605909478805713769099210420285165590770476798144789643066051491513607323
 . . . . . . . . . . . . . . . . . . . . [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)
							ec3d61a6576f531a7e2f232e9f016ca537dcaa9d
 . . . . . . . . . . . . . . . . [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 (28 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.torricellasicura.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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f000760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c000001700dfb3e550000040300473045022100a261f4b8d1e5d880b39cd9c9b9ef212b73d56c2c78a97d5d14b332f4c80ca4400220093559fdcd7b49b448825ef3d0053aa10735a304e0ccf338e34e77bac379972a0076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d913000001700dfb3fb60000040300473045022100e11d784d53cdf5542fd6ea4082de20e7c391aa212fedbcb1c632ae7c7470dcf5022034efccfa5b18105393ae1655b6d17aece440b0398a38950aa3f09310e0e8012b
 . . . . [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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