professorschoice.com

Issued by R3

About this certificate

This digital certificate with serial number 03:86:39:e3:41:f6:76:4d:5a:68:be:ba:7d:63:8b:0b:2a:ab 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=professorschoice.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:86:39:e3:41:f6:76:4d:5a:68:be:ba:7d:63:8b:0b:2a:ab
Serial Number (int): 307011640947716486615850911254709986339499
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 43:dd:7d:2a:75:bf:21:b5:4e:8a:9c:f8:9c:60:66:f2:1a:b8:e8:e2
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 43:a7:63:a4:5b:93:36:87:84:44:bb:a4:d0:6d:19:0c:c0:2c:65:ed
Fingerprint (sha256): 67:8c:bb:71:fe:68:ae:ac:27:4f:86:fd:97:54:b1:4f:de:f4:f3:fc:2b:f3:d5:0a:1d:2f:da:dd:7e:16:93:5f

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate professorschoice.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for professorschoice.com

Public Key Algorithm

RSA

Key Size

2048

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

professorschoice.com

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Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAz1vPt4vGYzYXzru4w7KR
NJNWWHa3zPFTSvoBXA7N+pRqBNLbNgQ/vKObi/bLq8BQkZjkoWOnDzxlYP3W2knS
wdxy9Bosmjbs1EOztLrm1hRwjo2hf0mwmB6hNVvjM8v8iCCYp23ego6X5PCcfmoF
aI+TnaNRWnEkIa/+N5yv0dEu9BCrQMiyd9pr+vG78dpG3wmy6xdeVG/DULRrriYS
uJO72X0Po/pi6ouy/LX2olWXR9KT7ToAN3q/+1qwpf63A3vd4/L1zUWcYtCVTWuE
oZExAiCY3CLItAyz6uogBwZ3C/M+qcrAQvJPhFlIu9j7XCdTevwbk/+fCcBQWWB5
/wIDAQAB
-----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 307011640947716486615850911254709986339499
 . . . . . . . . [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 'R3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2021-03-08 18:41:34 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2021-06-06 18:41:34 +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 'professorschoice.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 (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 26176603013953157121332823133189723848811708989302217521821010497581784183548940177049876806984497532796679251329572604406526150318947729938460863617043670850940818949157974248146511581120666072530528407732571230581689654672174071774518656042954683562668672167859200329129331307432307397401867855071468789291489082793081557413486245648169431857808147227847795991302361196346535409435747551942386665026735168875735931937392601767661861664473341285225202551601435310692236853138749945694592863968566783898568164208302271353765407020272772154516932196803251872063772005458609395080305352128733834220938443910806971120127
 . . . . . . . . . . . . . . . . . . . . [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)
							43dd7d2a75bf21b54e8a9cf89c6066f21ab8e8e2
 . . . . . . . . . . . . . . . . [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 142eb317b75856cbae500940e61faf9d8b14c2c6
 . . . . . . . . . . . . . . . . [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 (73 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://r3.o.lencr.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://r3.i.lencr.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 (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'professorschoice.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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef0076005cdc4392fee6ab4544b15e9ad456e61037fbd5fa47dca17394b25ee6f6c70eca00000178135beb830000040300473045022100857f165ded7ff234d70cb076415a935a30e57d6bd0b9efecec486bc68b4da4fc02204a0e0b085ac5a0f5922eeff84bfcf6eae71f0f2828e5380da65a3627bddb7cee007500f65c942fd1773022145418083094568ee34d131933bfdf0c2f200bcc4ef164e300000178135bebad000004030046304402201421f636951e20041ad64d809f08bbbda7a7b22f3c0c7d811e1733e2fcd7bd0302204f8416a177f47a40fee93a4a4d32db1b5877188f361d3b14a7468e433fbe26e8
 . . . . [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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