www.cflee.dev

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:93:07:14:14:8e:45:43:60:31:3f:4c:85:7b:1e:29:cc:fa 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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=www.cflee.dev

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:93:07:14:14:8e:45:43:60:31:3f:4c:85:7b:1e:29:cc:fa
Serial Number (int): 311367774591486386244672828448925603712250
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: d4:f7:9d:54:e6:6b:83:18:6c:38:bf:47:ae:ae:1c:58:c8:f9:f0:6f
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): cb:36:0f:e6:0c:ee:0c:18:c7:94:7b:36:55:29:0f:94:4b:3e:79:47
Fingerprint (sha256): e2:c1:42:de:4e:7f:d6:0c:73:b7:e7:97:df:05:e0:21:15:bc:1f:89:35:e5:ba:2a:08:73:50:c8:4a:2b:5f:96

Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x3.letsencrypt.org

Check the revocation status for certificate www.cflee.dev

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.cflee.dev

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

www.cflee.dev

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cflee.dev

Certificate

The complete raw certificate details for www.cflee.dev in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA40cO9yxuaxTVNcrVewkP
fsN2ZDJH2qtdLpoATop51IO/9SbxtVhHC5z31e7Cot+q4N1rn1YyirErgAd74GHe
UVJt01Op69pEzoTELHOd1XBmOFxaFdFWbWE/jj9YMiEvIJ5DX3E4tMU96wXUj3ir
/z4ytbOL3CFCESCzxLK1jsW/qVA/oANetcF2UJzbmNwUJrresE+YcX5n0sX1YP9a
IIjnT7aGvGqSmxsh8QmoCRoUMWRWtqiWcFB1LkLDBAvxlJXg7hIH+FEbuRx8gM8O
1G8I+gEC14L6F/mP1bbsCabT4EenIB2SXLe96A0nsT8cGNwROC/AiffnqTFfAWLR
xQIDAQAB
-----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 311367774591486386244672828448925603712250
 . . . . . . . . [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 'Let's Encrypt Authority X3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-03-06 23:22:42 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-06-04 23:22:42 +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.cflee.dev'
 . . . . . . . . [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 28691135459429671802104763821243569040593904351491175671967338467419246560935283091059946379051438891243784598436012621457849272695410938007733406712847285557446512994841559844918192642179092712920850337230363838883557376849527985345040833461844475878447460148585281186317406908939899980419448986789933640567130203031705989862592583345414881117647082440661541553130152403630648931189343787080571680132738317884244862117658518243558570493027892002549175112407291184143647499625318061938567577427414391109404351158465865614002984238992864644649526105155743606762319708956315109636713859528113086722997098817154701251013
 . . . . . . . . . . . . . . . . . . . . [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)
							d4f79d54e66b83186c38bf47aeae1c58c8f9f06f
 . . . . . . . . . . . . . . . . [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 a84a6a63047dddbae6d139b7a64565eff3a8eca1
 . . . . . . . . . . . . . . . . [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 (99 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://ocsp.int-x3.letsencrypt.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://cert.int-x3.letsencrypt.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 (17 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.cflee.dev'
 . . . . . . . . . . . . . . . . [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 2.23.140.1.2.1 (Domain Validation Certificates Policy)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.44947.1.1.1
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 'http://cps.letsencrypt.org'
 . . . . . . . . . . . . . . . . [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)
							00f0007500747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc56000001695587e3940000040300463044022061a1b5114fc58446a245957772b9ae95889814c141023c9d155386f5b5b03bd1022033b108bdb11a1f0155cb65a113c4a8141afdcfe204e89640b850df3f9125adb8007700293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f478000001695587e1910000040300483046022100de142ba7e67cd1df73884fcf2f25b37af0b9b403d5cbbf16b07c7bffaf24ba4a022100d4d1df2d9a3b177878722e4035506380486138191b7797b511504ff1ad2d2b73
 . . . . [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)
		0009acd968471b12b2a8acfd23423abcff600192fb0ef21ae73d0de1c7fa23e83d57c2564d6e848f76bf132fa74b9bb62240b0c519208503f53adf24092054945958a74a02feadc29c81926fb6124e11afa3b0a83f8e24063eebb7e328a8a23a0be72d86802111bbcb1c536253c74eb1104a0f985dfbf7d7f21e961bf53752f500e0950aa6f19a2a06127de1586dd80acb00c994ea35da4a97edf1cb43d3514e49dcfc2abac4d9dee33817dc9247d0f2add772690a885ba500be67b67e4fb23382d895c16f8c43d07ad7805dd79f92a888acb1d3ffe76599ae70755b5d54c4bb19bbbb2350a828009ac528817b3087b1646a056edccc12bbf3dd0b92e07c4fc4ed