ap.cs50.school

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:1b:6a:e3:58:6b:28:f0:66:ca:ce:ff:dd:05:ea:7d:f2:f8 was issued on by Let's Encrypt.

With 3 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): 03:1b:6a:e3:58:6b:28:f0:66:ca:ce:ff:dd:05:ea:7d:f2:f8
Serial Number (int): 270666560314428295480167675062031908467448
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 59:97:85:30:aa:43:4b:0a:77:3f:69:50:ed:9f:e5:79:ef:6f:4f:53
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): dc:70:f1:36:83:b4:bf:2f:79:d1:55:2d:b0:66:e9:15:5d:8e:4d:2b
Fingerprint (sha256): ef:6e:f9:de:02:ec:15:8e:53:74:6d:4d:8e:26:16:e0:8b:c3:95:bd:27:00:09:e0:2a:ea:28:17:9f:56:9c:78

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

3

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
mail.cs50.net
office.cs50.net

Other certificates including the domain name cs50.school

(limited to 100 certificates)
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-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzQz0vdR65aOH4rxc8O90
U6yO10y0nOFhoK0nweWCqkM1yPqsORB89DYgnOMcPiOPKU6LUbY0Mfr+tnRBqVgS
PejXAfF6f9NjGIlicR+l0WPLg0QcN/2XaYnB6mRDn8qfiKpZ58vfU/VhRns7LR72
LgK4j6kBdHJryHzSoXfvAGl+IS/ipM9oPI+Z/GBhVmCio4lZZgG4nLOsNq2WDRlt
2RtAUF4OSRBgICWlARUOlvOwICRQVL2RAR82sK5avhJ8DSlnTi4CHef6aGSP6TMJ
GlYksvUTnODodmLRZpBaS7IuZzZYwooy2GtYjzYgy/ppITRMTQbmvG18vtg2RNNj
HwIDAQAB
-----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 270666560314428295480167675062031908467448
 . . . . . . . . [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 2019-11-19 15:36:26 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-02-17 15:36:26 +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 25885241370396897647893144108643268024762422824027347638666061510353668850541845951870784789536998191333762893558762948140644015810418369492205656230190024015383697506468363206519608813707585838890371913040081777309614593079940420601113008305296358963360616488757643799457632391076134005182860403517698433858350242746320118640882844904925571189012906657180509186482981669993807328133436985091102340224208127040474568804760151440974724104308628192844982651662361634343415920601980552910845839102674468448583248266877842530790727380696412115291944200611093330321671430282364900060282135977166619754708682165165873128223
 . . . . . . . . . . . . . . . . . . . . [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)
							59978530aa434b0a773f6950ed9fe579ef6f4f53
 . . . . . . . . . . . . . . . . [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 (50 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ap.cs50.school'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.cs50.net'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007600b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016e8485ba91000004030047304502203de308d0feb76d22c4120855464cdf57790162c96411cc21b1a37172b0814479022100c1eaa886e00476a157a5355172103acdb68ce2379d67fa9082d2fd0ad21351a00075005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016e8485bc920000040300463044022060d00a5499b1709a4bdeb15541468482d6e231ea0d9daf87b16af2a63edfec0102202c312b61170e94d2c1b32e497e0201206b33273b747e45baae60d9da4be8a396
 . . . . [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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