cryogenic.ninja

Issued by R3

About this certificate

This digital certificate with serial number 04:53:2e:c3:34:83:0e:32:87:52:f4:23:41:b6:15:49:19:fd was issued on by Let's Encrypt.

With 15 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=cryogenic.ninja

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate will expire on

Certificate Details

Serial Number (hex): 04:53:2e:c3:34:83:0e:32:87:52:f4:23:41:b6:15:49:19:fd
Serial Number (int): 376754738232240982030230499009222733797885
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: da:1f:af:0d:3d:af:4e:b6:4c:83:31:88:0d:a9:05:a5:eb:b4:a7:b5
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 83:98:8d:6e:92:a0:d7:7d:12:90:84:45:d7:f6:fa:59:3b:d3:d0:44
Fingerprint (sha256): ab:d4:ce:22:3d:a0:a4:d4:e0:e2:3f:f3:20:14:67:7f:2b:2b:24:aa:55:5f:74:88:02:4f:94:03:54:82:ca:ac

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

Revocation information

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

Check the revocation status for certificate cryogenic.ninja

15

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for cryogenic.ninja

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

arescrypto.net
choresla.com
cryogenic.ninja
deyy.vc
dumbwordpressquestions.com
gentrycounty.com
labeldoll.com
lakeandes.com
michiganmetalandscrap.com
micoly.com
myvirtualcheerleader.com
netzerocertified.org
phatcigars.com
shadi.chat
wovenpatches.net

Other certificates including the domain name cryogenic.ninja

(limited to 100 certificates)
cryogenic.ninja
cryogenic.ninja
cryogenic.ninja
defis.ec.caocredit.com.cryogenic.ninja
cryogenic.ninja
cryogenic.ninja
cryogenic.ninja
cryogenic.ninja
cryogenic.ninja
cryogenic.ninja
cryogenic.ninja

Certificate

The complete raw certificate details for cryogenic.ninja in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsM5l9s5KSUEhKPuTrJk6
zZsPEp0SEPlNg9Zg2MFu+HpWprP6dSVfTfLGPr05Mdgoa4w1U6L6qDPdOgF66rol
JtWk65Ir31I4UrPFQkOMnRQHyMwshCzKjUyF2wWjJBKRaH1WfawkznBgSNruS5s0
/fST6v9CP2q4BunEPhr9jgaviSxXnNRh41ue0Sojx6JzShxdhs2AzOKDXB7GB83k
kSoscvEMeGU5xyCRakmeF7xkG6cY84TlNWfGRqXmG4fIyYJiLMNE4WSAHuwFmzGf
PZbFusINhd9NChwjsvPSt+Z7jchKWH/LMgZbvBBXu2yZpWi2D0yF0Ac1ZvuPh/Yw
dwIDAQAB
-----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 376754738232240982030230499009222733797885
 . . . . . . . . [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 2024-04-04 21:03:12 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-07-03 21:03:11 +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 'cryogenic.ninja'
 . . . . . . . . [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 22319720467727153259606618826905629382068050768170531960541830626610988884624114779181881657127387761508280356108338209946847022293936606949757411803502662151409671464162684856178789345302448027724808863988711396595832079041479834136069008323001465704143132771025854522158540797685320176107250148823188419476767911541132409966644443718352331708564960800827821260107413154684091157627015608796149297292341572823744626980964633278939456114965810408988185710324227504188914878021936068333279430984848106934308302829357086292777381501559623217979060047699246093074547492448806527798711268490567956747147340442284475166839
 . . . . . . . . . . . . . . . . . . . . [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)
							da1faf0d3daf4eb64c8331880da905a5ebb4a7b5
 . . . . . . . . . . . . . . . . [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 (269 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'arescrypto.net'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'choresla.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cryogenic.ninja'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'deyy.vc'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'dumbwordpressquestions.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'gentrycounty.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'labeldoll.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'lakeandes.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'michiganmetalandscrap.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'micoly.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'myvirtualcheerleader.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'netzerocertified.org'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'phatcigars.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'shadi.chat'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'wovenpatches.net'
 . . . . . . . . . . . . . . . . [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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef0076003f174b4fd7224758941d651c84be0d12ed90377f1f856aebc1bf2885ecf8646e0000018eab23304a0000040300473045022100f403f61efef9851eb508641e7cd11c596336a48fc13941885e62304708033b8202205f7ce1b7ac4bcecd631c776466de21bd6622c51daea50baee6793acdc93778fa00750048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018eab23304b00000403004630440220730403787aa2a0d4ef47898649962097178e47c0f28bb09126ff3226aeac0005022033370841f531605d98074d96f26bf1d56b68caea824b7584f34f3956537ca332
 . . . . [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)
		003efb1ed44d59aa3d53fc20daba1bc5e9be9fd145f295d13a52ddf76f997e1191973c59bc1369ad66ee1eef2524e519ff1bdbd1a2ea0a2ea5872c8b60acdd5b499e077b6a2e6220e400e3dc57e1f438501075c5f06101637e3f5522cb85392dc0fffe47470852e1ab573ba75b157b77652ede9c67b8dd1ea5dfc303d8da8bc8f8006d61c32c1f96a038ce2c882f9bd4080a1681a01299d38cd85f7e3ed33c98d0a4956fa98670f36174cc929f4a64570a2aa64311f85cd2c2c3a9ed8a336b46b9474461862e9b5fe49b2257ec34153cbb32a6979e30e38116af88823327410635a5bac3431f495bb80450b401ad8d8d91554d6cd6dcb7fd1fe12526bed08935d0