cs50.io

Issued by Amazon

About this certificate

This digital certificate with serial number 08:08:ac:00:3c:46:66:e8:04:7d:36:fe:ed:05:86:72 was issued on by Amazon.

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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=cs50.io

Amazon

Organization: Amazon
Organization unit: Server CA 1B
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 08:08:ac:00:3c:46:66:e8:04:7d:36:fe:ed:05:86:72
Serial Number (int): 10678850934253645049574700567008478834
Serial Number lenght: 124 bits, 16 octets

SubjectKeyId: 72:6f:02:2a:95:44:b3:6d:4b:1e:56:8c:c4:57:b3:0d:d7:a2:fb:19
AuthorityKeyId: 59:a4:66:06:52:a0:7b:95:92:3c:a3:94:07:27:96:74:5b:f9:3d:d0

Fingerprint (sha1): da:e8:81:b4:d9:57:88:74:5c:8d:0e:27:6c:73:2f:5e:7c:07:91:00
Fingerprint (sha256): 4c:ec:07:a7:27:37:c9:45:8f:cf:d2:49:6b:35:ee:12:05:f7:a7:bc:b6:74:37:ef:71:e8:80:d7:94:2d:81:0a

Issuing Certificate URL: http://crt.sca1b.amazontrust.com/sca1b.crt

Revocation information

OCSP Server: http://ocsp.sca1b.amazontrust.com
CRL Distribution Point: http://crl.sca1b.amazontrust.com/sca1b.crl

Check the revocation status for certificate cs50.io

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for cs50.io

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

10 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

cs50.io
*.cs50.io

Other certificates including the domain name cs50.io

(limited to 100 certificates)
ap.cs50.school
ap.cs50.school
ap.cs50.school
*.legacy.cs50.io
ap.cs50.school
*.cs50.io
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
cs50.io
cs50.net
cs50.io
*.cs50.io
cs50.net
cs50.io
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
cs50.io
ide.cs50.io
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
cs50.io
cs50.dev
*.legacy.cs50.io
ap.cs50.school
cs50.net
*.cs50.io
ap.cs50.school
cs50.io
*.legacy.cs50.io
cs50.net
cs50.io
ap.cs50.school
*.legacy.cs50.io
cs50.net
ap.cs50.school
ap.cs50.school
cs50.io
cs50.io
ap.cs50.school
*.legacy.cs50.io
cs50.dev

Certificate

The complete raw certificate details for cs50.io in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuDaTuMKB1f+EfZpacGk/
B46KwWX73dJT06a2gAsrQmAO0ypr8UJUvgh2MCSrg/zrc6y2q0nLrQB3DfgfpayK
/3tQwcc6dRmKPq9AHIdPHPauVpNHYnxlkXqnuH/+yDSYN/aZ016ROStKHtpa+3us
wwWxUxI1LkZcOR64IkJJABnfyjA7yLyH/Ic/dJv9Voa9k2O58DJIRCV/JXnBx8Dw
FIE5WdMlwSTIkFvN3ZsycB6+CjRnRs54/H6dL9rSrrfgzi8zD8u24GvISzDu2Qll
THWFdZwOfaKsJLnGIN8ElFJnhcM/arN0/dNLadwVhWB0ZjV4famKhHzWDEuRnwUE
3wIDAQAB
-----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 10678850934253645049574700567008478834
 . . . . . . . . [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 'Amazon'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.11 (organizationalUnitName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Server CA 1B'
 . . . . . . . . . . . . [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 'Amazon'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-22 00:00:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2021-04-22 12:00:00 +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 'cs50.io'
 . . . . . . . . [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 23254761054232244793095624215458360280357789119450571611914226576855415417754049638387497393672922682494422733362419196582031506060513441024239721357636024030474805688139470913878871536428793631377243878742555088928909037521371681600577454682706658048832970862071623408377777640311450331454205029589632755940029931629292314518734155482613146889038729157284664351290599203286441344532579491962031277855456636014732790274473679446834916555761297338239386697808675764108902925308251725485101982976444597211581069867338748931252241839584312828295169692559758401715964929664232554297724499906410606530632268792188650194143
 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.35 (authorityKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 59a4660652a07b95923ca394072796745bf93dd0
 . . . . . . . . . . . . . . . . [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)
							726f022a9544b36d4b1e568cc457b30dd7a2fb19
 . . . . . . . . . . . . . . . . [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 (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cs50.io'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.cs50.io'
 . . . . . . . . . . . . . . . . [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 2.5.29.31 (cRLDistributionPoints)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (52 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://crl.sca1b.amazontrust.com/sca1b.crl'
 . . . . . . . . . . . . . . . . [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 (25 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.16.840.1.114412.1.2 (digiCertDVCert)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 1.3.6.1.5.5.7.1.1 (authorityInfoAccess)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (105 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.sca1b.amazontrust.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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://crt.sca1b.amazontrust.com/sca1b.crt'
 . . . . . . . . . . . . . . . . [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 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)
							00ee007500f65c942fd1773022145418083094568ee34d131933bfdf0c2f200bcc4ef164e30000017102b9684300000403004630440220303cbade21104ba8daff04a528b81d3b069cd7bafb92d65ec597fc9c1007f986022010a7d9b5a8bded6d115b2840c437cc7f70f40a751bd2f1783a56592ba3771a050075005cdc4392fee6ab4544b15e9ad456e61037fbd5fa47dca17394b25ee6f6c70eca0000017102b968910000040300463044022001e3d626478ee1a727f7312deb1bb1b060dc605cc2250bfe235b171084c2e52302205515f7655546503c2cf091b1e8d0504f8796f34e0ad1626a9c454b04636d8970
 . . . . [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)
		0085eccf61630ef134a07a14425a5186300a454ba4183121c765fdcfbb496c1daaa7be373941c0860d3b3c89319dd4a2dcd22d7b6dcc2092216cd76fe3d04f4907a6640c10f67988b3f404a6a36cb920e74611386a345f45c77b8f18b1d6e5d05b916bf683e210dce5dafb6ed0fdc1285e6552650d7e1896b0580f9fc4fbf6cf51a030c5abd77d9bf027da7f4350f13925c7a35a5ca3da5a0b6f26e8ea1353b0eac704b233355d2b59f9c6478e06f1dc3e13d48bb08fd7759524aa190d194510eaf237f17c8e34c48a53c3a1f34cd20d6e224cbc3d251f2e6efa6c637c1bcdd2af1d25cf9ece52af834c5543b77579a0a06ce75dc349555d88c0ea58bd87b3d02a