www.cosima.net

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:ee:f5:cc:65:cc:bf:2b:77:b1:aa:9b:44:ab:8e:63:72:ed 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.cosima.net

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:ee:f5:cc:65:cc:bf:2b:77:b1:aa:9b:44:ab:8e:63:72:ed
Serial Number (int): 429763069206495865692130144212493447426797
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 9e:39:dd:b9:9e:69:31:70:f5:73:e6:db:1f:4b:71:9f:27:ec:9b:6c
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): e0:b2:61:96:95:0d:77:87:ca:ae:5a:33:e1:8b:5e:32:41:de:23:96
Fingerprint (sha256): 3d:2a:be:26:d1:99:fc:ce:ab:3c:1d:d6:ee:3e:5d:0c:f4:11:6a:e6:03:13:f6:ec:e9:5c:9d:64:c4:2c:d5:7c

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.cosima.net

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.cosima.net

Public Key Algorithm

RSA

Key Size

4096

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.cosima.net

Other certificates including the domain name cosima.net

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.cosima.net in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIGUzCCBTugAwIBAgISBO71zGXMvyt3saqbRKuOY3LtMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA5MzAwMDQ4MDlaFw0x
OTEyMjkwMDQ4MDlaMBkxFzAVBgNVBAMTDnd3dy5jb3NpbWEubmV0MIICIjANBgkq
hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA8Kwxb1j536QbC92z0TsFEZO01lsrvjVH
n4/quAAlKNUvP0ytb7xu9ZGCjRIUlWWFAMpx8aciTiZBgh4CA4n1dXfndJRIe6xn
mRwmKX4z1CzyRJ8bKwG5l1G+qfn8/jnIHGwRCBphi6lYnOqZWIXA4o/8805QVsvs
+rX1nKn+k3tYFRlBQ9zxK59w0+Cp1dURT7oS66NBBXOMW4+KbDoBzyPG+gzaygPd
aKvpk+YW6jNmLcKQEsNeoMoZo2tB8g85Y+DAOc3i2JwyXSztp36vrLgIcVgBD55H
BtDQobKgVpfyrcwh7f0t9qp0GY/9n4oFyeo+hHPt4wfXMpx4Gw9nKFQ/EZQgkb2a
Pq0GJJdmWXZSyzPGj5QDBJSZsyTubwrZ4Y7rxG2ridxI2SXu5cortPd1xLhIG+tP
3UlXC93M/nSg54+NTPPIY1WMkc1yS5TqbSGyVsG1RkwYyOsll0c6QniGwiMvrKul
GFzCVj0kX/sFiUPiHUqANrB/tdPDagKAzkQrYaLVj+9K13FG3fVZDVtKnBZZWAcf
h7b/0fRSC5R10oX8Nk+NOtDfy8Ejvxr6pXeyRYDn/5REjNmB1dylcx/YJFm0Olnl
zo8ZiEp711XMTS+4Z+TaPWj+MX8j9iM9sQSvkblPYT5JA87y3MYawnJPA2G5G+Du
dRkQXQWASO0CAwEAAaOCAmIwggJeMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU
BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUnjnd
uZ5pMXD1c+bbH0txnyfsm2wwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo
7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt
eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt
eDMubGV0c2VuY3J5cHQub3JnLzAZBgNVHREEEjAQgg53d3cuY29zaW1hLm5ldDBM
BgNVHSAERTBDMAgGBmeBDAECATA3BgsrBgEEAYLfEwEBATAoMCYGCCsGAQUFBwIB
FhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCCAQMGCisGAQQB1nkCBAIEgfQE
gfEA7wB1AHR+2oMxrTMQkSGcziVPQnDCv/1eQiAIxjc1eeYQe8xWAAABbX/ag04A
AAQDAEYwRAIgO2j5JWUICE9JkxnxQvIYoEUk4QBlvzg2H0hD72gm6OICIHbANsI6
ZYIePe3L1ADggRBVzTja19v+3uX9trpzxcrXAHYAY/Lbzeg7zCzPC3KEJ1drM6SN
YXePvXWmOLHHaFRL2I0AAAFtf9qDSgAABAMARzBFAiBZZErSZcgBPnwPOHW7iRsC
QHyTEYjWOT2rmIsFKISztAIhAKTh1VPAXn0d0BtskTu4DAuwIMbbdTy52QvGXVlg
81pKMA0GCSqGSIb3DQEBCwUAA4IBAQA1suQUNA4y8J3D0c1gf67jCEE9YSs6/GQi
gpJjs3rCw2YZaIrbTEfW+h1U9dhrl8XtvCVTRCxu5c+/DiwBwcOutwHeb0yd2Fpc
HzEuMraBrjlkU6LvLUVntWj3/qo2ALRnrz/2kQxXMTd1Xabqy3V66Z3k2l2hmfJx
bgB6eIcR5rm4PJDsBW7w31hKLIUpcegMFFQpYoleQLYtPQSgQYzg/S64go8QaSZH
Mde5vMU3gMreyxl4pMWvWES7QGkrGJPhmUHw52kkuKE5qT3XpY/bcXmFOuAkEuR8
axdAWaInDqMB0d3v5VYyLq7smfkMYHYOrYBDKo0oBINW3h5eYhBD
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----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-----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 429763069206495865692130144212493447426797
 . . . . . . . . [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 2019-09-30 00:48:09 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-12-29 00:48:09 +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.cosima.net'
 . . . . . . . . [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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 981858664529929408764588414123435488925920038488019866554453562783050780711079991943949593236121187017801168263775563583137796015842053492619866996000611404629221787737240513364808067229116280573907128351262689638884667076765938448303452944989271054187668005774865873524041446879724716681380708382729583077454461714735018372909889363101222524465259318988190285699891616732093305038439290014981661456128807003791172856991412046779014012101832047979885528150285255031767467713105824401668126834812289107470269155412492069467568536033220119115402556023913997081793556198392900077428101758005626227679584498607689325356515186956700791974472697180561201422969489422131297978779653287084777317664219291077744565383303425910072505390508480697233480099879336155213384786782637590717843958462450907656107773188600172465312040100517905004166814324983062524826414628478319517163022861689052230902873612166870628888926602309877553367835503099777228744960357685262660924819731715490378673469783303689031817001521534945467716371847270653362212411149393711378809667726679768980522146231621937625089648922539116351011969749553796695724869071651195475943686267081531161080802269196099689902847447584857928710212353727078325887975602071049108369459437
 . . . . . . . . . . . . . . . . . . . . [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)
							9e39ddb99e693170f573e6db1f4b719f27ec9b6c
 . . . . . . . . . . . . . . . . [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 (18 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.cosima.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 (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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007500747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016d7fda834e000004030046304402203b68f9256508084f499319f142f218a04524e10065bf38361f4843ef6826e8e2022076c036c23a65821e3dedcbd400e0811055cd38dad7dbfedee5fdb6ba73c5cad700760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016d7fda834a0000040300473045022059644ad265c8013e7c0f3875bb891b02407c931188d6393dab988b052884b3b4022100a4e1d553c05e7d1dd01b6c913bb80c0bb020c6db753cb9d90bc65d5960f35a4a
 . . . . [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)
		0035b2e414340e32f09dc3d1cd607faee308413d612b3afc6422829263b37ac2c36619688adb4c47d6fa1d54f5d86b97c5edbc2553442c6ee5cfbf0e2c01c1c3aeb701de6f4c9dd85a5c1f312e32b681ae396453a2ef2d4567b568f7feaa3600b467af3ff6910c573137755da6eacb757ae99de4da5da199f2716e007a788711e6b9b83c90ec056ef0df584a2c852971e80c14542962895e40b62d3d04a0418ce0fd2eb8828f1069264731d7b9bcc53780cadecb1978a4c5af5844bb40692b1893e19941f0e76924b8a139a93dd7a58fdb7179853ae02412e47c6b174059a2270ea301d1ddefe556322eaeec99f90c60760ead80432a8d28048356de1e5e621043