torrevecchiapia.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:35:03:18:fa:c3:4e:b3:a2:91:25:5e:e8:4b:da:a2:e3:59 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=torrevecchiapia.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:35:03:18:fa:c3:4e:b3:a2:91:25:5e:e8:4b:da:a2:e3:59
Serial Number (int): 279375940627278687686300117566721253106521
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 5d:1a:97:c9:db:45:d4:94:96:a8:08:2b:3b:f7:ea:5e:f9:5d:b9:0a
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 9a:37:6e:25:39:a5:a8:d6:b5:82:b7:23:e9:9b:55:ef:1e:4a:b4:a7
Fingerprint (sha256): a7:23:5d:1e:de:d3:ab:e1:15:5c:8f:45:a0:ad:58:f4:14:4d:bd:46:6b:d1:c7:ea:c5:4f:01:0a:87:be:6f:d6

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 torrevecchiapia.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for torrevecchiapia.com

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

torrevecchiapia.com

Other certificates including the domain name torrevecchiapia.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for torrevecchiapia.com in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAwjMM8qS0wWgTuKpVlgDe
9NF+352jWQIvjMlAWlCUPcxO9+oyrzX54QzF15I1+5EmLzlQheb6EQhtxZgPJW6D
gyzBsi/QOCLvKvMoF4pOftlm0/ZC2kfapvbAyqv6o4njfsO48ebAbLMwYsdkqAE+
Ymfc0oQNchLn0oh8d27chNQ2UMLXvz5ehEbC39lNmln+FS5M0z6+hHBHRsm64z4F
w+DPnLRofioDepQWYOutBCT5UkbYdc99O7J6q0XG8BsrgEPZyWa078tLHeCxADAd
/b9mqC+NwO3lA+ktrW2CRs7V1gFqirBaRofdJ2iTfv/NAiWmdW3VZ1HXRllJlVwE
GQFHYDRIXcLPRvVJ5hroh2vlX3aH1VDRjF2VOBYKBr6bV0Dx42OADEqv2yJiI/8Y
B5yJ3gsSvfqTyBcgw3JwDEC1HbVwFppEaLnw+iytM8c22MejjdSdkjgLNP/4abkW
xDe7anOyVcww7vcYZgy4lngRdGUywzpqsRypufz4kmqZVNhF4kRMQ2Tl+nFq0XzZ
cCrkEEuj/WkzqHHEdEavt59f5TBWrozR6evx+sCrQtcQ9PiffeOm3CgDt/WQz6yB
ariVgYO1TiNymxQbhg+3d/YWPWVCLq2oqdQTpAG+ULEg3ClIMJ0w9NVoEI3Ko272
kkK3TMh74QPOjwDiEf34dRkCAwEAAQ==
-----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 279375940627278687686300117566721253106521
 . . . . . . . . [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 2020-04-07 16:09:01 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-07-06 16:09:01 +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 'torrevecchiapia.com'
 . . . . . . . . [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 792264496795276640980227600859158719985816871809600442967827614193125871263993772859462612549530863574097132277130551694119148949431079517411806960900443944907192647628531238055163126791525510136396919197458994320927913005482506988163594612466153865153295088320163372059356280766593256614959678973705659520357248430080037309896562132971213098549840368820988720138814196234383792214246287512268411086753583093602940320691080396944680204844443528535733286184783898347955472521341626677728779928654618349441507315123976684663995409614446218156930600326795767025506544408176118331151771950660404250885528558095272569683344583929203009131742222074266083979613651104045740384817957257133196831947761456102530141628059109002714942130570525660876615190377964419785126346608676043035149397642374299903401732783117779177799925494709307321499656807239055659944459386912838594438992554853284954844876589297119826108007788651107634265734314893030322125647472928024887049728501707423392731957776500362777364825508932506713024847917239686022900511313044235140413427271397361001346743609469633845670955459261625157366565751147216547605229217842429980084996135178375877547640581742629200082416113530517277067159698541359022142102902159587990327293209
 . . . . . . . . . . . . . . . . . . . . [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)
							5d1a97c9db45d49496a8082b3bf7ea5ef95db90a
 . . . . . . . . . . . . . . . . [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 (23 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'torrevecchiapia.com'
 . . . . . . . . . . . . . . . . [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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007600e712f2b0377e1a62fb8ec90c6184f1ea7b37cb561d11265bf3e0f34bf241546e00000171559ddc7b000004030047304502202aceb7d54bcf18a5203c285a35a9bd738dfab850a3c5aa2b0a2b9fe5e5e25768022100dd8bcf8175b8ddd9446608f7f6292be0a31820c51a303ada919622ffa174e093007700b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e00000171559ddc6e0000040300483046022100e6f708e0356ad3e807db33ef179264a60be715cba23f185de0f80c6a5ca8c6ba022100d091752877b89d2a9efe8c3ab6cf2368f2c6d7251210f9dcbfe7bf7a12723929
 . . . . [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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