ap.cs50.school

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:15:27:f3:09:df:46:57:c8:b6:c0:83:26:55:a9:88:11:09 was issued on by Let's Encrypt.

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=ap.cs50.school

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:15:27:f3:09:df:46:57:c8:b6:c0:83:26:55:a9:88:11:09
Serial Number (int): 268535889320824020103383804344829320106249
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: e4:85:b4:6f:64:23:dd:b0:07:5b:7a:1b:c1:64:c6:34:c7:ce:18:23
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 56:a2:c9:59:ba:53:e1:c6:9b:68:d9:aa:1e:11:0c:f6:76:0b:a7:46
Fingerprint (sha256): 70:0a:04:a2:75:98:4a:a1:55:9b:b2:a3:cc:8d:1d:93:a3:d9:30:2b:a7:79:51:e0:d3:38:99:d4:60:ac:b6:4f

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 ap.cs50.school

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for ap.cs50.school

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

ap.cs50.school
office.cs50.net

Other certificates including the domain name cs50.school

(limited to 100 certificates)
ap.cs50.school
ap.cs50.school
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ap.cs50.school
ap.cs50.school
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ap.cs50.school
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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-----
MIIFYzCCBEugAwIBAgISAxUn8wnfRlfItsCDJlWpiBEJMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTEwMDgwMzE1MjlaFw0y
MDAxMDYwMzE1MjlaMBkxFzAVBgNVBAMTDmFwLmNzNTAuc2Nob29sMIIBIjANBgkq
hkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvLrsnbYr7MHtNWJYKISdyAH/IR3VLbFb
E5pyWj8YjxnXLYYGbPMDs38eY8IkRTnP+lvQIT3g6g4rRJTF+x7U+7AmAcLpJx24
Mmp5Xde3Mdl0V1DYyL0YNJjiIg1GjobHUGc7o7qmb/lpmmaCdGIHcZV/ZA96MOnK
NBX9BbWPe3dKQ9W8f4DebPXhS9psy4ltfqsmPlnLlJD1GI129nCphC6c/9+3/soH
R1wp38G+Wdc2M/RwNsLaVQUdfwwD/nFRqz6QiEfNHWc/umEe3LG1N74nYzJT7qoe
rYR76i/CRXoA5TodsfgP4huf4kGfrMMU1hAZ9Hu2qUjFAj5qvhq1uwIDAQABo4IC
cjCCAm4wDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEF
BQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBTkhbRvZCPdsAdbehvBZMY0x84Y
IzAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86jsoTBvBggrBgEFBQcBAQRj
MGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14My5sZXRzZW5jcnlwdC5v
cmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5sZXRzZW5jcnlwdC5v
cmcvMCoGA1UdEQQjMCGCDmFwLmNzNTAuc2Nob29sgg9vZmZpY2UuY3M1MC5uZXQw
TAYDVR0gBEUwQzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcC
ARYaaHR0cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcwggECBgorBgEEAdZ5AgQCBIHz
BIHwAO4AdQBep3P531bA57U2SH3QSeAyepGaDIShEhKEGHWWgXFFWAAAAW2plETO
AAAEAwBGMEQCIDB1X8+DZYoKSN/jpUxbj5IVnFOR6Rn2No15t5lKQAWrAiBSFcNi
6epJqoJw3Og/FrjLeAnUF024Twc6AKOwQW2kWQB1ACk8UZZUyDlluqpQ/FgH1Ldv
v1h6KXLcpMMM9OVFR/R4AAABbamURMYAAAQDAEYwRAIgebdO9S8biMivUtN4kKvz
gjFkavyGA3959W+U1vxZit4CIE7SLQKCarDX+4nDgMjGidrwTGuGZLviNezNoPeP
rPeNMA0GCSqGSIb3DQEBCwUAA4IBAQAaZ7Owo8H1ngAmU2qLkvI72BEb2CDMKUfr
zKOeWkkdQcieZY5a3R+ldAPYhd8Akjp5w32YeG1kv1nyjPmHvjwTrrfTq3KTiD1Z
mObjyr1+elkV4c9zZNt8crIuoNwNDPLYDUmyRoQLrHNGEUMDlDWl8gpUwIeEy2r4
7rmFlHsgBlzIuj4BS/wq5jHMknSTUzy5Fte6D7SheHGlafguUMvWhM9CMk/FziQ9
i6qyTRiJO6Ls0myeEEI1BaAnzZ4G4XVFgTV35LhmN1NT3Vn5oZ7t+6xBiMtGi1x4
lzEuoNygx3vM54ZVZfsx1aV2ZkrmVKH2ZRPH7PwNHP0leI6/swk7
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvLrsnbYr7MHtNWJYKISd
yAH/IR3VLbFbE5pyWj8YjxnXLYYGbPMDs38eY8IkRTnP+lvQIT3g6g4rRJTF+x7U
+7AmAcLpJx24Mmp5Xde3Mdl0V1DYyL0YNJjiIg1GjobHUGc7o7qmb/lpmmaCdGIH
cZV/ZA96MOnKNBX9BbWPe3dKQ9W8f4DebPXhS9psy4ltfqsmPlnLlJD1GI129nCp
hC6c/9+3/soHR1wp38G+Wdc2M/RwNsLaVQUdfwwD/nFRqz6QiEfNHWc/umEe3LG1
N74nYzJT7qoerYR76i/CRXoA5TodsfgP4huf4kGfrMMU1hAZ9Hu2qUjFAj5qvhq1
uwIDAQAB
-----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 268535889320824020103383804344829320106249
 . . . . . . . . [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 2019-10-08 03:15:29 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-01-06 03:15:29 +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 1.2.840.113549.1.1.1 (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 23824977132259892562703075875855348691749966957449459907533903737900136726285699442667899479115306249695381297873696330339183322719747558294607543332252055979386381552119551652647020695945403050423814416142335296831314500554380283069778824487552921044359232765192905751513992794213604305673600374440554221110745009508102257794902291037341894407826504078347379972040525409483137685576661640953128916634139851073493580187633492644725809561191903557850237564878955529780339175350828294498915143863493674699587517466761534004644219336239351202717873307770112752289995000929324187511157669537289574655633608937620335408571
 . . . . . . . . . . . . . . . . . . . . [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)
							e485b46f6423ddb0075b7a1bc164c634c7ce1823
 . . . . . . . . . . . . . . . . [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 (35 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ap.cs50.school'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'office.cs50.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 (243 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes)
							00ee0075005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016da99444ce0000040300463044022030755fcf83658a0a48dfe3a54c5b8f92159c5391e919f6368d79b7994a4005ab02205215c362e9ea49aa8270dce83f16b8cb7809d4174db84f073a00a3b0416da459007500293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016da99444c60000040300463044022079b74ef52f1b88c8af52d37890abf38231646afc86037f79f56f94d6fc598ade02204ed22d02826ab0d7fb89c380c8c689daf04c6b8664bbe235eccda0f78facf78d
 . . . . [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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