uestc.icu

Issued by R3

About this certificate

This digital certificate with serial number 03:16:ff:f4:21:a3:46:18:69:c9:88:8c:41:a1:9b:e0:60:d5 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:
  • 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=uestc.icu

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:16:ff:f4:21:a3:46:18:69:c9:88:8c:41:a1:9b:e0:60:d5
Serial Number (int): 269163290609155423056401263608067214303445
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 89:6c:32:10:8e:a2:1c:ce:16:be:b5:c8:5c:ff:0c:83:fd:7f:ab:c2
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): f7:ed:28:3b:7a:8a:4d:f9:f8:57:4b:ad:3d:32:62:3c:69:68:b9:26
Fingerprint (sha256): 1d:92:e0:2d:b6:78:76:2f:12:4c:7f:da:cb:f9:d8:2b:95:28:2d:6a:67:a7:36:ff:dd:bd:2d:00:53:61:c1:da

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

Revocation information

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

Check the revocation status for certificate uestc.icu

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for uestc.icu

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

uestc.icu

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sni.cloudflaressl.com
posts.uestc.icu
sni.cloudflaressl.com
uestc.icu
archive.uestc.icu
www.uestc.icu
uestc.icu
forums.uestc.icu
uestc.icu
tekaku.yuta.run
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Certificate

The complete raw certificate details for uestc.icu in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAloOhnlxwz8/O+od8+vMG
Ym+49xo6wcxzwNtE7wXS5iGysMFfRxYgBNYKZccnssaA4XsZz8bBxSE9lYFPaV71
b2kXCB4t/EM59xzXxk9hL7rDf8vaat4j6RmVdR82bAbKEW8m0w8jlrERWasHKf+o
2Z6qLjPwkADFuZkZDCLJGb0x62VJ6q0iVthztGqGhFzBqSaSJMJEX+kJtW7LnMAI
62EQgzGUEizhFLIvJBVIe70LAGcPoX//xp2zenIHpvDLGzOXKE0IiLLw8lyHFRMF
xf4zM8I03JkcBv+KXo4Em3VjqZ7yocVHvxmlqwJ9ae7/6nyAwxtqG26lkQca37ID
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 269163290609155423056401263608067214303445
 . . . . . . . . [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 2023-10-08 11:49:42 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-01-06 11:49:41 +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 'uestc.icu'
 . . . . . . . . [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 19000655569329087234356465447904497269805540274009089315968926533458332977459266357080121909477273162070757423577787525350081247694264491122852625510919138272886414370053009160281310552261185052717982984522563462739658620828776840731311919480764599243758419592452224285853086008856376086856573085829089008878038226769073353885783478778414896115217654990008786759723745348485376452639210019099718475602886081556849613492479580995192165526980076114930164053413616997884434070138063343857399406599355093176811700551772680525625249830138875307944331532001654568184016780581849009105409472060945530077205719436327254098753
 . . . . . . . . . . . . . . . . . . . . [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)
							896c32108ea21cce16beb5c85cff0c83fd7fabc2
 . . . . . . . . . . . . . . . . [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 (13 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'uestc.icu'
 . . . . . . . . . . . . . . . . [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)
							00f0007700dab6bf6b3fb5b6229f9bc2bb5c6be87091716cbb51848534bda43d3048d7fbab0000018b0f5617ba0000040300483046022100f9aebf47ab35e949349fb5559c9c167c2fd2f396ed0419494d8ab2153d718c35022100f20840c8c25b911560ec57692ab30743118da77396135e5dcd412cb70f82588200750076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018b0f5617e9000004030046304402207a6fc15c40e6bc8965e0814dae57f0df427dc2234867797f5dbcca370d6c9718022044a22b7b37c606c931e11c1981e7eb98821c4d9f5602685157b6e3d78b7cd049
 . . . . [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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