www.istec.org

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:d9:72:95:91:97:9c:b1:cc:54:7e:43:ca:24:80:c9:18:cd was issued on by Let's Encrypt.

With 3 subject alternative names this certificate can be used to secure multiple fqdn's. 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.istec.org

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:d9:72:95:91:97:9c:b1:cc:54:7e:43:ca:24:80:c9:18:cd
Serial Number (int): 335330440013837128285721388783707835930829
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 49:41:78:a8:12:78:40:a6:0a:42:5c:36:7f:01:29:3b:c2:c4:37:cc
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 75:72:22:44:86:d1:24:3e:2b:89:af:21:e9:75:99:b6:ee:a0:fb:73
Fingerprint (sha256): 79:b5:56:f5:cb:11:3a:59:7a:3f:fb:8f:16:35:04:cc:b9:e9:30:2a:bb:88:87:a3:bd:74:1b:91:cc:c6:5f:9d

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.istec.org

3

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.istec.org

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

aula.istec.org
biredial.istec.org
www.istec.org

Other certificates including the domain name istec.org

(limited to 100 certificates)
submissions.istec.org
celsius.istec.org
biredial.istec.org
biredial.istec.org
istec.org
*.istec.org
istec.org
istec.org
istec.org
aula.istec.org
istec.org
istec.org
istec.org
istec.org
www.istec.org
www.istec.org
istec.org
istec.org
*.istec.org
aula.istec.org
istec.org
istec.org
istec.org
istec.org
istec.org
aula.istec.org
istec.org
istec.org
biredial.istec.org
istec.org
istec.org
aula.istec.org
istec.org
biredial.istec.org

Certificate

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

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIFdzCCBF+gAwIBAgISA9lylZGXnLHMVH5DyiSAyRjNMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDAyMjYyMDE2NTZaFw0y
MDA1MjYyMDE2NTZaMBgxFjAUBgNVBAMTDXd3dy5pc3RlYy5vcmcwggEiMA0GCSqG
SIb3DQEBAQUAA4IBDwAwggEKAoIBAQC9Wj+4sjgt49BKj1gOa3vpT+KB0EhoriCT
i2R61fNBMUuhzx3bSauGzcKILBhamykCVskk2QLZPWQ78UnoT67D4wC67Ot6Yzi6
kyoPjJ8YUeDQGbLZFb8eXETpgmrGg4O/2I80FLn8T9EeSoaNhltssbDNKs+NCQPO
gNMUx7RwhT4Uz7li4nxZuHXA+5xQ8eUaijPmpwPmTJSscMEDTbXaemizJg3Z/zsj
f5bHK+iLga8N4l0VfwN7WQdQEsv3U2YdXoqqx1q+gv70XAL6F9SJIN+g/61pG3k4
FDI2O2B1oZUGSrp2Xoa4OC/5J44/bGWaxb5VNQXM1paajJkuW7B5AgMBAAGjggKH
MIICgzAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUF
BwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFElBeKgSeECmCkJcNn8BKTvCxDfM
MB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsGAQUFBwEBBGMw
YTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNlbmNyeXB0Lm9y
ZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNlbmNyeXB0Lm9y
Zy8wPAYDVR0RBDUwM4IOYXVsYS5pc3RlYy5vcmeCEmJpcmVkaWFsLmlzdGVjLm9y
Z4INd3d3LmlzdGVjLm9yZzBMBgNVHSAERTBDMAgGBmeBDAECATA3BgsrBgEEAYLf
EwEBATAoMCYGCCsGAQUFBwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCC
AQUGCisGAQQB1nkCBAIEgfYEgfMA8QB2AOcS8rA3fhpi+47JDGGE8ep7N8tWHREm
W/Pg80vyQVRuAAABcINcGscAAAQDAEcwRQIhAJKtfhT1rypef9gyH+iYCEaDyMaT
Rb7ueio3r9d4I22iAiBIAZSQnmczpz2qNjAuy3lxzsaxnEj0w9xu9FwBFVCEyAB3
ALIeBcyLos2KIE6HZvkruYolIGdr2vpw57JJUy3vi5BeAAABcINcGrwAAAQDAEgw
RgIhAJrgTn6Z3kyEaqGjaOrNlpCkPHPO9RaQ0VV3SQjPixBpAiEAxzhpLVxBSXrK
Rg33kL1CQToAN/UiqCkSn/fFi5y7grcwDQYJKoZIhvcNAQELBQADggEBACWo6JPj
lQftRH3x7t6GhYadvyQWqZSnmvUuuSSPD9dZtuUTf0i/6VDq4rJuNCS9HLjx2PbA
rLhoIb2BtTiL+UAg9jhS8ARp/J5Hk4sDDZxaJmgBqVELUhG9xhzHQ+HX++5vTGar
mxboiVlUIGI2VZ6bg7tJjYerOb7cf8XsMLLqVwYeXEey4nnLX8GK1anVhLfWHkON
oaoH9SEBXzeiGqC3uAi1Jmkqc11a1o/JVwksHBYTYBr5BtxuGTBfGf+ynSbN+iqJ
5GQwmnmYgkm7EDQOmy7SjT0z8Fg//sOt3yaxBth1+1idAUV/dURfdpVBO0zIbo+v
yGSDjVHqI8QSc3k=
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvVo/uLI4LePQSo9YDmt7
6U/igdBIaK4gk4tketXzQTFLoc8d20mrhs3CiCwYWpspAlbJJNkC2T1kO/FJ6E+u
w+MAuuzremM4upMqD4yfGFHg0Bmy2RW/HlxE6YJqxoODv9iPNBS5/E/RHkqGjYZb
bLGwzSrPjQkDzoDTFMe0cIU+FM+5YuJ8Wbh1wPucUPHlGooz5qcD5kyUrHDBA021
2nposyYN2f87I3+Wxyvoi4GvDeJdFX8De1kHUBLL91NmHV6KqsdavoL+9FwC+hfU
iSDfoP+taRt5OBQyNjtgdaGVBkq6dl6GuDgv+SeOP2xlmsW+VTUFzNaWmoyZLluw
eQIDAQAB
-----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 335330440013837128285721388783707835930829
 . . . . . . . . [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 2020-02-26 20:16:56 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-05-26 20:16:56 +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.istec.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 (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 23903543035751623707404698571774912557511644277414050842664545266976008960115047060638814085434193380542314745766882491954088858935274270682307714018865953099214693961675215729628727420822474844087649459444006047235394521928970447683638991264719717385116500266805040311639047469377767436187039237303300853587526068396622343366770475196567226661676609450334697595539181797739711288418506576109951170977405485432361783257963923844406377771948566144434649300712241595138991845501218914604992044217174422224168418609151580309543599510089003468440269962249056531739441943944265945212259171638511582766082442375879714386041
 . . . . . . . . . . . . . . . . . . . . [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)
							494178a8127840a60a425c367f01293bc2c437cc
 . . . . . . . . . . . . . . . . [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 (53 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'aula.istec.org'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'biredial.istec.org'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.istec.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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007600e712f2b0377e1a62fb8ec90c6184f1ea7b37cb561d11265bf3e0f34bf241546e00000170835c1ac7000004030047304502210092ad7e14f5af2a5e7fd8321fe898084683c8c69345beee7a2a37afd778236da20220480194909e6733a73daa36302ecb7971cec6b19c48f4c3dc6ef45c01155084c8007700b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e00000170835c1abc00000403004830460221009ae04e7e99de4c846aa1a368eacd9690a43c73cef51690d155774908cf8b1069022100c738692d5c41497aca460df790bd42413a0037f522a829129ff7c58b9cbb82b7
 . . . . [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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