*.tenderplus.kz

Issued by RapidSSL RSA CA 2018

About this certificate

This digital certificate with serial number 06:1a:6c:53:0e:24:9f:15:eb:16:a5:14:73:57:8e:3b was issued on by DigiCert Inc.

With 2 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=*.tenderplus.kz

DigiCert Inc

Organization: DigiCert Inc
Organization unit: www.digicert.com
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 06:1a:6c:53:0e:24:9f:15:eb:16:a5:14:73:57:8e:3b
Serial Number (int): 8112564773583146547707709823108222523
Serial Number lenght: 123 bits, 16 octets

SubjectKeyId: 75:16:55:04:83:ef:29:63:14:6c:cc:e0:e0:33:3b:af:15:73:c9:f0
AuthorityKeyId: 53:ca:17:59:fc:6b:c0:03:21:2f:1a:ae:e4:aa:a8:1c:82:56:da:75

Fingerprint (sha1): c0:a2:42:21:f8:02:db:ed:9c:60:bf:70:d1:63:32:37:49:1f:47:79
Fingerprint (sha256): 61:a3:b9:10:bb:f9:a4:da:c3:d3:75:c7:5b:fb:c8:0f:67:e1:dd:bc:af:21:97:60:0c:b7:8e:99:9d:87:91:6a

Issuing Certificate URL: http://cacerts.rapidssl.com/RapidSSLRSACA2018.crt

Revocation information

OCSP Server: http://status.rapidssl.com
CRL Distribution Point: http://cdp.rapidssl.com/RapidSSLRSACA2018.crl

Check the revocation status for certificate *.tenderplus.kz

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for *.tenderplus.kz

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

10 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

*.tenderplus.kz
tenderplus.kz

Other certificates including the domain name tenderplus.kz

(limited to 100 certificates)

Certificate

The complete raw certificate details for *.tenderplus.kz in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1kn7iet2FRYxODYIyQb8
qTu6/pKM4LMNIOnkJdG7YR3o9WQ4vwDrBjrEUGP64vzyoJyDZ969+GbclMfny6H6
BIjr498vikjMTz85tV82WHSIs9R4Pe97p1VJlfPfrPcrqfOZdoQEBcMzOhFohOyz
o54q3ffSKL3rVM+pvSTJtluMQIYvbBsDHsMHzxgf10EpmV7zsEMewxvu07pTRMMx
nz+SgnVfty5QvtiJBTPsSjzcgZh/oRGGH6Tv3oK16RYkGNIAYTd1K9vp0azMNjp6
Vb+8f6lOwKu12EbhEfUSVLSv5Q0IMxHf7yMbVb8VDm/0EheaAzmQuIPnipU7xUsA
qQIDAQAB
-----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 8112564773583146547707709823108222523
 . . . . . . . . [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 'DigiCert Inc'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.11 (organizationalUnitName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'www.digicert.com'
 . . . . . . . . . . . . [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 'RapidSSL RSA CA 2018'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-08-22 00:00:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-12-08 12:00:00 +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:12|false] UTF8String '*.tenderplus.kz'
 . . . . . . . . [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 27051479429309510188141245253769618210249471101460017921223007833595868641157044414432523003034179691102657021125019869411921147785910037431619640827706683746685530483463827528034989154522163998971183033580451841128251316493747936320409005597184728519524156998169857854767829643495937088220075877495167499842046445968652665846657944743564172047727824650955800995899804517634785193496277488154618697791162925558652142100441764953155463006781393975143826082969978434450506256258854535297893030722579504496858931444439643086034282578914953486863561183871606706090086590695038955836151512715648173903961981652151707566249
 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.35 (authorityKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 53ca1759fc6bc003212f1aaee4aaa81c8256da75
 . . . . . . . . . . . . . . . . [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)
							7516550483ef2963146ccce0e0333baf1573c9f0
 . . . . . . . . . . . . . . . . [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 (34 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.tenderplus.kz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'tenderplus.kz'
 . . . . . . . . . . . . . . . . [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 2.5.29.31 (cRLDistributionPoints)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (55 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://cdp.rapidssl.com/RapidSSLRSACA2018.crl'
 . . . . . . . . . . . . . . . . [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 2.16.840.1.114412.1.2 (digiCertDVCert)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 'https://www.digicert.com/CPS'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 1.3.6.1.5.5.7.1.1 (authorityInfoAccess)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (105 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://status.rapidssl.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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://cacerts.rapidssl.com/RapidSSLRSACA2018.crt'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19 (basicConstraints)
 . . . . . . . . . . . . . . . . . . . . [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 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)
							00f0007700ee4bbdb775ce60bae142691fabe19e66a30f7e5fb072d88300c47b897aa8fdcb0000016560e814a40000040300483046022100d471952d6ea8641d18f81bd869f967c788fe4c591b520bdc2bf4f70640fe84da022100e79f58c69459e64d97fc55a7dafd7c06bd0622c0c5105fe0e21f6c29e0ece5f20075008775bfe7597cf88c43995fbdf36eff568d475636ff4ab560c1b4eaff5ea0830f0000016560e81530000004030046304402206de79d24818cf93e2ec52ad0fb6519d6d5ab0a20404f4570250026d55f9b622702204a532889ee4b8d2655511e80f6862f3418eb6b38464999c41113422d1da32a87
 . . . . [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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