ap.cs50.school
Issued by R3
About this certificate
This digital certificate with serial number 03:1a:c7:5b:e5:b2:8a:57:96:28:95:5c:c5:74:f4:34:a9:bb was issued on by Let's Encrypt.
With 23 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com. 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=ap.cs50.school
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate will expire on
Certificate Details
Serial Number (hex): 03:1a:c7:5b:e5:b2:8a:57:96:28:95:5c:c5:74:f4:34:a9:bbSerial Number (int): 270449192864217691898718328336490071108027
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: dd:7a:38:56:08:e6:f0:e3:46:ad:40:3b:8b:38:b4:cf:d7:91:48:1d
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): 15:e0:0e:2d:7d:03:d1:72:d9:e9:08:2e:44:d8:c7:c8:1c:08:75:97
Fingerprint (sha256): 96:8a:be:f6:5d:a8:0e:66:21:bd:cf:37:83:3f:a3:5c:64:5a:1f:ff:68:ad:c8:3d:3b:6e:19:1a:87:c1:45:35
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate ap.cs50.school
23
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for ap.cs50.school
Public Key Algorithm
ECDSA
Key Size
256
Signature Algorithm
SHA256 with RSA
Key Usage
Digital Signature
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
ap.cs50.school
cloud.cs50.net
courses.cs50.io
cs50.courses
cs50.id
cs50.io
cs50.net
cs50.tv
digitalphotography.exposed
ide.cs50.io
lab.cs50.io
mail.cs50.net
manual.cs50.net
office.cs50.net
photos.cs50.net
redirects.cs50.net
reference.cs50.net
sandbox.cs50.io
www.cs50.id
www.cs50.io
www.cs50.net
www.cs50.tv
www.digitalphotography.exposed
cloud.cs50.net
courses.cs50.io
cs50.courses
cs50.id
cs50.io
cs50.net
cs50.tv
digitalphotography.exposed
ide.cs50.io
lab.cs50.io
mail.cs50.net
manual.cs50.net
office.cs50.net
photos.cs50.net
redirects.cs50.net
reference.cs50.net
sandbox.cs50.io
www.cs50.id
www.cs50.io
www.cs50.net
www.cs50.tv
www.digitalphotography.exposed
Other certificates including the domain name cs50.school
(limited to 100 certificates)
ap.cs50.school
ap.cs50.school
ap.cs50.school
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ap.cs50.school
ap.cs50.school
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ap.cs50.school
ap.cs50.school
ap.cs50.school
Certificate
The complete raw certificate details for ap.cs50.school in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFfjCCBGagAwIBAgISAxrHW+WyileWKJVcxXT0NKm7MA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yNDA0MDQwNjIyMzRaFw0yNDA3MDMwNjIyMzNaMBkxFzAVBgNVBAMT DmFwLmNzNTAuc2Nob29sMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAECYEH65Zu 1txA8d/d5OivIxG9kiYcsbDyy7ddoylZlhnGIu2jQU2SoLlGp21q/VXOjt4qpBD1 Ztbj7dM9XQb8UKOCA3AwggNsMA4GA1UdDwEB/wQEAwIHgDAdBgNVHSUEFjAUBggr BgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQU3Xo4Vgjm 8ONGrUA7izi0z9eRSB0wHwYDVR0jBBgwFoAUFC6zF7dYVsuuUAlA5h+vnYsUwsYw VQYIKwYBBQUHAQEESTBHMCEGCCsGAQUFBzABhhVodHRwOi8vcjMuby5sZW5jci5v cmcwIgYIKwYBBQUHMAKGFmh0dHA6Ly9yMy5pLmxlbmNyLm9yZy8wggF3BgNVHREE ggFuMIIBaoIOYXAuY3M1MC5zY2hvb2yCDmNsb3VkLmNzNTAubmV0gg9jb3Vyc2Vz LmNzNTAuaW+CDGNzNTAuY291cnNlc4IHY3M1MC5pZIIHY3M1MC5pb4IIY3M1MC5u ZXSCB2NzNTAudHaCGmRpZ2l0YWxwaG90b2dyYXBoeS5leHBvc2VkggtpZGUuY3M1 MC5pb4ILbGFiLmNzNTAuaW+CDW1haWwuY3M1MC5uZXSCD21hbnVhbC5jczUwLm5l dIIPb2ZmaWNlLmNzNTAubmV0gg9waG90b3MuY3M1MC5uZXSCEnJlZGlyZWN0cy5j czUwLm5ldIIScmVmZXJlbmNlLmNzNTAubmV0gg9zYW5kYm94LmNzNTAuaW+CC3d3 dy5jczUwLmlkggt3d3cuY3M1MC5pb4IMd3d3LmNzNTAubmV0ggt3d3cuY3M1MC50 doIed3d3LmRpZ2l0YWxwaG90b2dyYXBoeS5leHBvc2VkMBMGA1UdIAQMMAowCAYG Z4EMAQIBMIIBBAYKKwYBBAHWeQIEAgSB9QSB8gDwAHcASLDja9qmRzQP5WoC+p0w 6xxSActW3SyB2bu/qznYhHMAAAGOp/zqxwAABAMASDBGAiEAsWEXT7g6q16OlKW0 c5j6giXlu1fpXuAYwuXN8eZLzkACIQCpnjVeDz5KkC3S8WfrD9OJrtFoRnjWBefI sy8mmhLxuAB1ADtTd3U+LbmAToswWwb+QDtn2E/D9Me9AA0tcm/h+tQXAAABjqf8 6tMAAAQDAEYwRAIgad9hK2dqp3x1uY+AjOYjWnCDIuiNFJ88xozLz/WKb6sCIEkR uAn+6/xBIwBw2pMooBzb0KM2QDXCd89LuXFS9HACMA0GCSqGSIb3DQEBCwUAA4IB AQB8lFvWSQqACRQ+kCiDYA5m55MRP45yGzrtbpHFNlNbcaerwwjTR7M6H4OL63Xj JXO1ZVkf4xph5EOfdrz88O5vkSWose4dGiWa+GzWjMKTbncj/ip+CYpXwBnFiHqw WmHCqsR+WJBLm3h36Ct/4iOZnOADlphLTMxJ2SXJCB1KA3dLWrjDvAd81KZJOzH9 0iOkOQzKccDZNZuV+tq7hNI9yuS/9VcuJxSWV2Uw9RLu4Y/PTdR7z75mJLxYs8c0 WwH3gQUDEpLMipFRohQNRl4ggTAaix1b3cdomPwzlRnQ/TE9GCmL7BMxe/IsAWfL EinsC1T/s5prbxpYjPvrPzXd -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAECYEH65Zu1txA8d/d5OivIxG9kiYc sbDyy7ddoylZlhnGIu2jQU2SoLlGp21q/VXOjt4qpBD1Ztbj7dM9XQb8UA== -----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 270449192864217691898718328336490071108027 . . . . . . . . [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 2024-04-04 06:22:34 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-07-03 06:22:33 +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 'ap.cs50.school' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.2.1 (ecPublicKey) . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.3.1.7 (prime256v1) . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (520 bits) 0004098107eb966ed6dc40f1dfdde4e8af2311bd92261cb1b0f2cbb75da329599619c622eda3414d92a0b946a76d6afd55ce8ede2aa410f566d6e3edd33d5d06fc50 . . . . . . . . [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 (1 bits) 0780 . . . . . . . . . . . . . . . . [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) dd7a385608e6f0e346ad403b8b38b4cfd791481d . . . . . . . . . . . . . . . . [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 (366 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ap.cs50.school' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cloud.cs50.net' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'courses.cs50.io' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cs50.courses' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cs50.id' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cs50.io' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cs50.net' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cs50.tv' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'digitalphotography.exposed' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ide.cs50.io' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'lab.cs50.io' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.cs50.net' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'manual.cs50.net' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'office.cs50.net' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'photos.cs50.net' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'redirects.cs50.net' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'reference.cs50.net' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'sandbox.cs50.io' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.cs50.id' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.cs50.io' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.cs50.net' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.cs50.tv' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.digitalphotography.exposed' . . . . . . . . . . . . . . . . [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) 00f000770048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018ea7fceac70000040300483046022100b161174fb83aab5e8e94a5b47398fa8225e5bb57e95ee018c2e5cdf1e64bce40022100a99e355e0f3e4a902dd2f167eb0fd389aed1684678d605e7c8b32f269a12f1b80075003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018ea7fcead30000040300463044022069df612b676aa77c75b98f808ce6235a708322e88d149f3cc68ccbcff58a6fab02204911b809feebfc41230070da9328a01cdbd0a3364035c277cf4bb97152f47002 . . . . [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) 007c945bd6490a8009143e902883600e66e793113f8e721b3aed6e91c536535b71a7abc308d347b33a1f838beb75e32573b565591fe31a61e4439f76bcfcf0ee6f9125a8b1ee1d1a259af86cd68cc2936e7723fe2a7e098a57c019c5887ab05a61c2aac47e58904b9b7877e82b7fe223999ce00396984b4ccc49d925c9081d4a03774b5ab8c3bc077cd4a6493b31fdd223a4390cca71c0d9359b95fadabb84d23dcae4bff5572e271496576530f512eee18fcf4dd47bcfbe6624bc58b3c7345b01f78105031292cc8a9151a2140d465e2081301a8b1d5bddc76898fc339519d0fd313d18298bec13317bf22c0167cb1229ec0b54ffb39a6b6f1a588cfbeb3f35dd