www.zajac.boston

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:fd:f3:bd:90:77:93:28:20:8a:2d:8d:51:f1:f1:6e:37:02 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.zajac.boston

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:fd:f3:bd:90:77:93:28:20:8a:2d:8d:51:f1:f1:6e:37:02
Serial Number (int): 347752283303500845907822071603398703986434
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 0b:5c:e0:95:c4:0d:19:69:8f:be:3b:a4:e3:dd:07:9d:09:e2:fa:ca
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 84:68:ed:05:48:5e:b9:7e:f1:13:b6:8e:96:75:8f:54:69:ec:82:6d
Fingerprint (sha256): ca:f0:75:af:ce:95:a7:5a:68:92:ab:d2:a3:c8:73:1a:f8:7b:aa:32:10:35:38:68:cb:6d:20:89:ca:46:9f:1f

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.zajac.boston

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.zajac.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

www.zajac.boston

Other certificates including the domain name zajac.boston

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.zajac.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 347752283303500845907822071603398703986434
 . . . . . . . . [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 2019-12-25 02:26:16 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-24 02:26:16 +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.zajac.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 887946529160588846363199812625385647379397912747528781239359439862942627492395354133559020420082420774223482993784488667568673309566302920372864164434002926842197987113546613679756052597834448807359659855948819034037760134772131589519497805151597188244547772621004978580361254405240590426398648798035036643750904486572880014895311611695387433419301980676804588881781321869024387952275541391711802537270114172957101214422961697949147788312206828636262232151245942806572436544447470790505735920851567242317307454589155562969402743179459781346300134520758518514929346364742119101964133111728137004156052029053108904257009659721210209803123443906240228994609573145874508244845109908185925415226471490928374185353030682503962315650814815478963001223118979040416071407001962520642636230587026037233074850665426898665138788780297222851225249660795192384298216535197686811608184700311101150276961315378835276833488288237308314167431911828159207743009101622677808372494979605058260458987503448736458854134138966370085632678876948803096635465760792645030055393896933874841170869985567363743897252463482003387621475531413396634281972235171790029855465761170964669563493982622018935671159997259925676643378558952256658165618106965884303379323379
 . . . . . . . . . . . . . . . . . . . . [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)
							0b5ce095c40d19698fbe3ba4e3dd079d09e2faca
 . . . . . . . . . . . . . . . . [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 (20 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.zajac.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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f10076005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016f3b173cec00000403004730450221008cb35dd3fb8d18cfb395e32e2508e9785d4a5f5837d55e0136363dbe0e23ef8f02201a7b1239d43dc259f0efd30d0b66987975944a8a73657c958a76e726c8beacbd007700b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016f3b173cde00000403004830460221008b2170a9bf6f10c4c3e429edb04698dadf534bb8e43253bd814ab7abb0f6fff8022100bccebdb1e984813fcacd7775cde378129e1d33eb830b6a104447116a4c4cc987
 . . . . [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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