ap.cs50.school
Issued by R3
About this certificate
This digital certificate with serial number 03:47:7a:9f:0a:b0:2c:d9:28:05:25:77:28:fa:55:0a:2d:c8 was issued on by Let's Encrypt.
With 18 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=ap.cs50.school
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:47:7a:9f:0a:b0:2c:d9:28:05:25:77:28:fa:55:0a:2d:c8Serial Number (int): 285659897454135770125210312365726749044168
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 73:c4:42:a4:81:83:d3:fb:b4:71:ee:7a:cd:d3:1e:3f:2b:f6:be:4b
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): cf:c2:56:e6:7e:04:7e:6b:81:01:8b:5b:26:ae:f0:07:ae:b3:43:34
Fingerprint (sha256): af:5e:7e:1e:d6:37:bf:96:21:19:41:52:69:72:0c:c1:f7:33:43:e8:1f:50:03:4d:86:c2:a7:bf:3f:3c:89:2f
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
18
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
cs50.id
cs50.io
cs50.net
cs50.tv
digitalphotography.exposed
mail.cs50.net
manual.cs50.net
office.cs50.net
photos.cs50.net
redirects.cs50.net
reference.cs50.net
www.cs50.id
www.cs50.io
www.cs50.net
www.cs50.tv
www.digitalphotography.exposed
cloud.cs50.net
cs50.id
cs50.io
cs50.net
cs50.tv
digitalphotography.exposed
mail.cs50.net
manual.cs50.net
office.cs50.net
photos.cs50.net
redirects.cs50.net
reference.cs50.net
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
Certificate
The complete raw certificate details for ap.cs50.school in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFNTCCBB2gAwIBAgISA0d6nwqwLNkoBSV3KPpVCi3IMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yMzA5MTIxODUxMTNaFw0yMzEyMTExODUxMTJaMBkxFzAVBgNVBAMT DmFwLmNzNTAuc2Nob29sMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEqmhRxBKs TPYkor4e4swHL+MtpkQKyi0kiEI3kwFWkKxbd0NDuZ/JXkDQ/kCG7jHV457Ae2qa EhRkzLuyeEDOc6OCAycwggMjMA4GA1UdDwEB/wQEAwIHgDAdBgNVHSUEFjAUBggr BgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUc8RCpIGD 0/u0ce56zdMePyv2vkswHwYDVR0jBBgwFoAUFC6zF7dYVsuuUAlA5h+vnYsUwsYw VQYIKwYBBQUHAQEESTBHMCEGCCsGAQUFBzABhhVodHRwOi8vcjMuby5sZW5jci5v cmcwIgYIKwYBBQUHMAKGFmh0dHA6Ly9yMy5pLmxlbmNyLm9yZy8wggEtBgNVHREE ggEkMIIBIIIOYXAuY3M1MC5zY2hvb2yCDmNsb3VkLmNzNTAubmV0ggdjczUwLmlk ggdjczUwLmlvgghjczUwLm5ldIIHY3M1MC50doIaZGlnaXRhbHBob3RvZ3JhcGh5 LmV4cG9zZWSCDW1haWwuY3M1MC5uZXSCD21hbnVhbC5jczUwLm5ldIIPb2ZmaWNl LmNzNTAubmV0gg9waG90b3MuY3M1MC5uZXSCEnJlZGlyZWN0cy5jczUwLm5ldIIS cmVmZXJlbmNlLmNzNTAubmV0ggt3d3cuY3M1MC5pZIILd3d3LmNzNTAuaW+CDHd3 dy5jczUwLm5ldIILd3d3LmNzNTAudHaCHnd3dy5kaWdpdGFscGhvdG9ncmFwaHku ZXhwb3NlZDATBgNVHSAEDDAKMAgGBmeBDAECATCCAQUGCisGAQQB1nkCBAIEgfYE gfMA8QB3AHoyjFTYty22IOo44FIe6YQWcDIThU070ivBOlejUutSAAABioryqMEA AAQDAEgwRgIhANjipKbYE4wQO/rfjkEm8bD7KeOAPwO/i3EPWbi4FRXCAiEA63a6 HrsRSUJQVztSMc2xZLve0f5KQCz1w5oBmRYe31YAdgDoPtDaPvUGNTLnVyi8iWvJ A9PL0RFr7Otp4Xd9bQa9bgAAAYqK8qjTAAAEAwBHMEUCIEIb9xt2D8SunrjJdyNZ +nvoVZd4wZg2knR1zboFvnGQAiEAlLadacX7WcmhWznt15nO6tKkJlg+iy6RLj7F cjaDazEwDQYJKoZIhvcNAQELBQADggEBALP2YDnSUfqBWk8HxUH15JuSbOK1pSIt SqyAhnHw2cQ06hrqGfccxLhiAP3hYQgj+mUZtVxViM7mPhbdVZ3oITVPBlN687ry ksfU8ElHuMp6JfBqeBopMwClIR9nBzvza9Vg4NXJpTTOsH3I/SRcWFMbL24OPwdG B78f2e1oBbuBP4eiwVKBPfitAnW8KvnLKvEfWbmMi7yDVKYW5KDGz0RLVqmPxezk ESi7AXKtyUb5QBA8ZdViNsQjHpOlMvs4YbmLDetjZmQVcz8dSYf70z7tPdWcmrL6 vGjDvp7IvLl71w9185kvMHZmsChahRAUvPfzS4ifZ/OjZ0zKQ7OFWII= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEqmhRxBKsTPYkor4e4swHL+MtpkQK yi0kiEI3kwFWkKxbd0NDuZ/JXkDQ/kCG7jHV457Ae2qaEhRkzLuyeEDOcw== -----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 285659897454135770125210312365726749044168 . . . . . . . . [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 2023-09-12 18:51:13 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-12-11 18:51:12 +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) 0004aa6851c412ac4cf624a2be1ee2cc072fe32da6440aca2d2488423793015690ac5b774343b99fc95e40d0fe4086ee31d5e39ec07b6a9a121464ccbbb27840ce73 . . . . . . . . [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) 73c442a48183d3fbb471ee7acdd31e3f2bf6be4b . . . . . . . . . . . . . . . . [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 (292 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 '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 '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 '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 (246 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes) 00f10077007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb520000018a8af2a8c10000040300483046022100d8e2a4a6d8138c103bfadf8e4126f1b0fb29e3803f03bf8b710f59b8b81515c2022100eb76ba1ebb11494250573b5231cdb164bbded1fe4a402cf5c39a0199161edf56007600e83ed0da3ef5063532e75728bc896bc903d3cbd1116beceb69e1777d6d06bd6e0000018a8af2a8d300000403004730450220421bf71b760fc4ae9eb8c9772359fa7be8559778c19836927475cdba05be719002210094b69d69c5fb59c9a15b39edd799ceead2a426583e8b2e912e3ec57236836b31 . . . . [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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