www.kaufmandevelopmentgroup.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:22:08:f7:a7:d5:d4:d2:c8:3f:0f:6d:99:f8:e6:b3:93:ed 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.kaufmandevelopmentgroup.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:22:08:f7:a7:d5:d4:d2:c8:3f:0f:6d:99:f8:e6:b3:93:ed
Serial Number (int): 360030663927747099841165874249748572247021
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 06:a9:dc:d9:14:3d:50:f5:1b:98:ed:b6:dd:11:e7:bd:16:b7:0c:fc
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 86:4b:d7:0d:20:72:6e:bd:eb:09:e3:82:d8:55:b5:fc:01:74:8b:d8
Fingerprint (sha256): 1f:62:c5:af:7c:e1:b3:78:d2:3e:c8:cc:54:ba:d5:ca:bd:b1:1e:59:61:e3:80:9e:0a:89:fc:22:a0:5a:35:3b

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.kaufmandevelopmentgroup.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.kaufmandevelopmentgroup.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

www.kaufmandevelopmentgroup.com

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Certificate

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

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIFdjCCBF6gAwIBAgISBCII96fV1NLIPw9tmfjms5PtMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDA0MTAxMzQ0MDZaFw0y
MDA3MDkxMzQ0MDZaMCoxKDAmBgNVBAMTH3d3dy5rYXVmbWFuZGV2ZWxvcG1lbnRn
cm91cC5jb20wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDSIDj51Qpa
AyxyMLB6KzB6Dj8DTy7Gt8co3AacDr/P443tnK1ZoCC/H6r4RKqCB9U5jrxiCwSJ
OcegOGmCCtatvrYJ/8cF6LrMPjC4kAIVEzgq1IpYcgWyP2MthqppaIib8LPih+zn
XBICLEjz2WWEwD2n79SJq3tfdjediGt/F8FDglFPqOfk73xzyq/YywJbdk1OhvlZ
HpYnEFLZBaT/+1UwyM5OGLr3BqHXdsgVyCXekGUP/K5ELQn33VOpZX0JiBXXJTW2
yHj0IRdkPzaNeq0ThQJQnZVHgbCtGFymhrHNw6uFPIQ+diUcvYucRtDYkkpF0Yw5
6A6xV2Vzd76BAgMBAAGjggJ0MIICcDAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYw
FAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFAap
3NkUPVD1G5jttt0R570Wtwz8MB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/z
qOyhMG8GCCsGAQUFBwEBBGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50
LXgzLmxldHNlbmNyeXB0Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50
LXgzLmxldHNlbmNyeXB0Lm9yZy8wKgYDVR0RBCMwIYIfd3d3LmthdWZtYW5kZXZl
bG9wbWVudGdyb3VwLmNvbTBMBgNVHSAERTBDMAgGBmeBDAECATA3BgsrBgEEAYLf
EwEBATAoMCYGCCsGAQUFBwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCC
AQQGCisGAQQB1nkCBAIEgfUEgfIA8AB3ALIeBcyLos2KIE6HZvkruYolIGdr2vpw
57JJUy3vi5BeAAABcWSMRoIAAAQDAEgwRgIhAO5TmDjoK7rPPGpXEJvWuKH/IlaO
mWEFSoypbokToPjJAiEAwvKP/FlnVWniXeHKnfP8z14PgX5Q9KuXJTZLa8s8XP8A
dQBvU3asMfAxGdiZAKRRFf93FRwR2QLBACkGjbIImjfZEwAAAXFkjEb8AAAEAwBG
MEQCIBFJNv4zym8TbtH2M+yqbkqwnGfRNykAYuqT5zziLY6oAiAXFK3V2V4D7IVK
OUqWCApYANF1OOlZjFbIK+zPumubATANBgkqhkiG9w0BAQsFAAOCAQEAfGGV+nr9
JnM0MTa7JL92wZag8Vas7AS7FmnHuBr+TCG9sEc12ziBs32ppovdl1BJAF2Y8AtX
JtJBvWfhXpsnFlU5h9zXxOq9UeM85yQGWJk303Wb/K3MSkt+JgvSe6EcLyWnT48h
aTBtdl9TFliEGIZTFP+YlmeKL75IfAypAcLzXJ3CX653KuoyGBk0YtPbNNheez9U
yqVG1tBfSGN56JH2HGD0qeaD2rVTZlT8fzCIYmFLCgN73e3SN1J3kAdoRnB/NJ8E
X8dvEuFhTscrahtFICZhYx56CS3Qa0+ooRCqM7aMjehbVGT0HvEtw81Ryxa/OxLy
KwQsOjKqZ/30Ng==
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0iA4+dUKWgMscjCweisw
eg4/A08uxrfHKNwGnA6/z+ON7ZytWaAgvx+q+ESqggfVOY68YgsEiTnHoDhpggrW
rb62Cf/HBei6zD4wuJACFRM4KtSKWHIFsj9jLYaqaWiIm/Cz4ofs51wSAixI89ll
hMA9p+/Uiat7X3Y3nYhrfxfBQ4JRT6jn5O98c8qv2MsCW3ZNTob5WR6WJxBS2QWk
//tVMMjOThi69wah13bIFcgl3pBlD/yuRC0J991TqWV9CYgV1yU1tsh49CEXZD82
jXqtE4UCUJ2VR4GwrRhcpoaxzcOrhTyEPnYlHL2LnEbQ2JJKRdGMOegOsVdlc3e+
gQIDAQAB
-----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 360030663927747099841165874249748572247021
 . . . . . . . . [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 2020-04-10 13:44:06 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-07-09 13:44:06 +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.kaufmandevelopmentgroup.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 26525933580473082111902249977497198299994490395761839978378162005556210476922102498228393338084215176214197038894889124325278730686380955455712746447605380648917731815551589204020578061323224350018416055347721947400544776263522574153747128000271249321641389996925660781157998197386549805823258347667957672573970034102118826753107869834487674216475479004984314527749613089221470795786318433709790651477915732855492285840438387760600312452607599772433687779429213040087417300203697244164894481552935821991050859377758894995681469085389619826728311635349456383635012773065020430746666490592639036774769513815608292523649
 . . . . . . . . . . . . . . . . . . . . [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)
							06a9dcd9143d50f51b98edb6dd11e7bd16b70cfc
 . . . . . . . . . . . . . . . . [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 (35 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.kaufmandevelopmentgroup.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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007700b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e00000171648c46820000040300483046022100ee539838e82bbacf3c6a57109bd6b8a1ff22568e9961054a8ca96e8913a0f8c9022100c2f28ffc59675569e25de1ca9df3fccf5e0f817e50f4ab9725364b6bcb3c5cff0075006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d91300000171648c46fc00000403004630440220114936fe33ca6f136ed1f633ecaa6e4ab09c67d137290062ea93e73ce22d8ea802201714add5d95e03ec854a394a96080a5800d17538e9598c56c82beccfba6b9b01
 . . . . [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)
		007c6195fa7afd2673343136bb24bf76c196a0f156acec04bb1669c7b81afe4c21bdb04735db3881b37da9a68bdd975049005d98f00b5726d241bd67e15e9b2716553987dcd7c4eabd51e33ce72406589937d3759bfcadcc4a4b7e260bd27ba11c2f25a74f8f2169306d765f5316588418865314ff9896678a2fbe487c0ca901c2f35c9dc25fae772aea3218193462d3db34d85e7b3f54caa546d6d05f486379e891f61c60f4a9e683dab5536654fc7f308862614b0a037bddedd237527790076846707f349f045fc76f12e1614ec72b6a1b45202661631e7a092dd06b4fa8a110aa33b68c8de85b5464f41ef12dc3cd51cb16bf3b12f22b042c3a32aa67fdf436