www.kystrom.com

Issued by R3

About this certificate

This digital certificate with serial number 04:71:f2:83:84:a4:85:f4:3d:cf:9d:3c:9a:d5:58:fc:a4:5d was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com. 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:
  • DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Certificate Subject

CN=www.kystrom.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate will expire on

Certificate Details

Serial Number (hex): 04:71:f2:83:84:a4:85:f4:3d:cf:9d:3c:9a:d5:58:fc:a4:5d
Serial Number (int): 387223407245288393771979221222874733651037
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 84:5f:9d:1b:dd:9b:bc:25:37:99:36:91:3d:00:82:a1:2e:c5:c1:15
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 64:35:f8:4e:a8:8a:14:a9:d3:6b:7e:b5:2c:f7:40:44:28:cd:a8:47
Fingerprint (sha256): a3:3e:2b:2e:c6:48:25:7f:89:d3:04:d3:12:34:88:27:8b:fc:d7:0f:43:b5:50:d5:3c:2f:cc:3b:ed:94:80:79

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

Revocation information

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

Check the revocation status for certificate www.kystrom.com

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.kystrom.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

kystrom.com
www.kystrom.com

Other certificates including the domain name kystrom.com

(limited to 100 certificates)
sample.acgagency.com
omggame.com
shelter.app
kystrom.com
jsonmate.com
one.kystrom.com
www.letafall.com
www.mmcallsapp.com
www.kystrom.com
web.tiko.social
vadiba.saulesaptieka.lv

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyI85/v91RjLdKfk+Zhn2
I+g+EW/Wqe56KKACIHHCfEdPn0j0aZM9U5KhxuiDah9U+KV9e/tU3oTSWrT9RfK2
1vAGRwGiIszonO3N7PPnn5PjjobzRDlkpjD4ET6zmL283++P6YdqBnjsAJIBOcxm
7fuoFERoaPioEoHFq2ghuAkos1n10TgUwFpB3BPwOUFlkxO1b+Q1Rx8u7KyjQm43
KCXfJGV7vvYaohEAR+Xl4t2jb1DKo5JedoKvI8BAgevfBSzSVSe1hxksyPNlD+uk
md8j0N9AJIC9Hk95DeHSgJwRYSOYb2jwr26p7hhVS2L481lr5/p9n/ADZscfe6sk
TwIDAQAB
-----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 387223407245288393771979221222874733651037
 . . . . . . . . [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 2024-06-01 17:16:06 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-08-30 17:16:05 +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.kystrom.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 25318288635968732813125084540816147834921347886843314891898656086316507975532614132685192582569214802218612532586259752797022530718556706546558488043748495670309143024585016038139597506585786465237828251814060356860611671215046229209425828004531460573216186898488473791399469387063033736778086830595928957023285634696093672357317334133458582779379448223160418099592146056552444295470354444862391810270938858483972900900641119389158728289788813788494459861334981645481030871176848808073397253308143381748073398521173142445245798688374879234368542054108119063968920227661046368987125640997756503755531147530872459830351
 . . . . . . . . . . . . . . . . . . . . [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)
							845f9d1bdd9bbc25379936913d0082a12ec5c115
 . . . . . . . . . . . . . . . . [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 (32 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'kystrom.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.kystrom.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 (12 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f00076003f174b4fd7224758941d651c84be0d12ed90377f1f856aebc1bf2885ecf8646e0000018fd50419490000040300473045022100dae791501f4803e37f15e0e99571ef023c2c953db0dd2fb8adafea93dee5d51802205634483d851813586a81978e89a4809bcf71c1f47a0b0fdbe2d3ae0af5b7be0e00760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018fd504194b0000040300473045022100e44d1f1db344b2096354aa2745a91abf90658b074526752d7fc86a16736ee4570220495ce19ba7aaee657c7acde8a679e262be2121dc1398f8b29603554a612b0b42
 . . . . [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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