flor-tsukuba.jp

Issued by R3

About this certificate

This digital certificate with serial number 03:12:86:bf:d5:be:0a:0e:d8:17:6a:dd:86:1f:22:c3:a8:c8 was issued on by Let's Encrypt.

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:
  • 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=flor-tsukuba.jp

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:12:86:bf:d5:be:0a:0e:d8:17:6a:dd:86:1f:22:c3:a8:c8
Serial Number (int): 267641053015202500412297449283224674216136
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 8b:c6:de:b8:64:b6:96:39:73:f1:fc:0a:4e:ba:10:12:d4:7c:5d:df
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): ef:1c:a3:6c:12:17:13:16:c6:57:92:a0:61:64:24:d1:46:d1:f7:cc
Fingerprint (sha256): 61:6c:80:89:1e:dd:cb:9b:0d:bc:ca:c5:fb:75:ac:e5:94:3e:05:b5:76:ad:08:d8:f5:74:8b:ee:b8:62:bc:e9

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

Revocation information

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

Check the revocation status for certificate flor-tsukuba.jp

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for flor-tsukuba.jp

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

flor-tsukuba.jp
www.flor-tsukuba.jp

Other certificates including the domain name flor-tsukuba.jp

(limited to 100 certificates)
flor-tsukuba.jp
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flor-tsukuba.jp

Certificate

The complete raw certificate details for flor-tsukuba.jp in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4pNiKZ3GIKWLhROi9fxD
0UVeez1kQMJhQGqQ35ZwOYL2i5h+n5nL/pJoZmi3gtA1EqQVp/QcWqqdPPyOME4Z
V+zipzrx9j5/a4aaas7aEX+4YFtbTa/l1uCZcEBL6fV3zO+lqol6y6tcPYToq9O6
8AhFw8XJCxqmetWELVz0A+HIqOxPDvoPtchQKHsgFtIuHTZ/YqGBv2Mz/mV9wetB
jJ+IPjk4/ecUdWbqAr9gUrdYNg7rNPlNPKAM4OhnE6/ysJegklUYlbskra7HqxRY
lJtxHXfbcgZyAobDQQGm1iJkegtYVjCfkQOPawW5EgruhA3CIQL7VFmTJohCQAKL
MQIDAQAB
-----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 267641053015202500412297449283224674216136
 . . . . . . . . [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 2023-10-31 19:06:53 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-01-29 19:06:52 +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 'flor-tsukuba.jp'
 . . . . . . . . [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 28602534409025628727762100740624339132902036203191634229033513456207578866070296691857400173103059974320251426336631592124563635708645592604692857402777555009201847513152334112244110820327933013878030091325702372761862969710351293352465414381767334617177887406224567524129666086785993782630107747542381521865657388461261084061877046674038305677067816110303145758897934951964317059330488252204274710882403030012030814799518217963961933376290226332259815288267233979930591937298896216069090904373803513516400448931036310156453443698665252546177494479137753242442239743829041549822492852698699814171354387691146485861169
 . . . . . . . . . . . . . . . . . . . . [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)
							8bc6deb864b6963973f1fc0a4eba1012d47c5ddf
 . . . . . . . . . . . . . . . . [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 (40 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'flor-tsukuba.jp'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.flor-tsukuba.jp'
 . . . . . . . . . . . . . . . . [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 (243 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes)
							00ee007500dab6bf6b3fb5b6229f9bc2bb5c6be87091716cbb51848534bda43d3048d7fbab0000018b87589efd00000403004630440220179f4708c357a932bf01409efa6e45f9029e973969337df7858e8dcd370223d402207796f2dc0b1a13a45984ef73f5f46c09df21671cbe894bf78d2f562ce1fd6d08007500eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018b87589ef1000004030046304402203f9825574ce25f9766f4fe7d681090c9c49a54cc1e684731d9f2a7c16d938ca2022079c386c4d3a6f449f3fbbbb75efba2a3825164550a7c217b916ef46e4988128a
 . . . . [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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