ap.cs50.school

Issued by R3

About this certificate

This digital certificate with serial number 03:c0:a9:fe:c7:ce:f3:6f:bf:34:27:5c:35:47:f2:3f:c6:3e was issued on by Let's Encrypt.

With 15 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:c0:a9:fe:c7:ce:f3:6f:bf:34:27:5c:35:47:f2:3f:c6:3e
Serial Number (int): 326897034671386496109285510379447649289790
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: a1:a1:f2:5b:43:c8:6d:98:03:be:7d:d0:18:73:a8:7d:38:0b:3b:a1
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 12:d6:d3:c8:20:4a:1f:09:73:cf:04:85:ee:94:da:3c:99:e9:fc:d7
Fingerprint (sha256): 0c:f4:d7:01:d4:98:21:96:47:ea:1c:a2:9a:bc:70:25:3d:2b:46:0e:5d:bb:56:28:20:44:a9:07:d7:55:5b:2f

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate ap.cs50.school

15

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.dev
cs50.id
cs50.io
cs50.net
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

Other certificates including the domain name cs50.school

(limited to 100 certificates)
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
ap.cs50.school
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-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEEus4eM6OOOmPBXEHF1eN2jT0DZfO
vL5K9DYPA+DiINyk2BtVFgPB+qVmPSf3xD7Gi0C8wFluOhs+3y6mCfj2NA==
-----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 326897034671386496109285510379447649289790
 . . . . . . . . [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 2022-09-21 23:44:53 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2022-12-20 23:44:52 +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)
				000412eb3878ce8e38e98f05710717578dda34f40d97cebcbe4af4360f03e0e220dca4d81b551603c1faa5663d27f7c43ec68b40bcc0596e3a1b3edf2ea609f8f634
 . . . . . . . . [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)
							a1a1f25b43c86d9803be7dd01873a87d380b3ba1
 . . . . . . . . . . . . . . . . [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 (219 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.dev'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 '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: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)
							00ee0075002979bef09e393921f056739f63a577e5be577d9c600af8f94d5d265c255dc7840000018362a79559000004030046304402204fa8a633be1569ea4f69bc17520f1230b09dcdc109f549ddb052658a484b47030220054492ce9464e883657a4ecfca45df32e1b1a0ac251b9224ab45eb477b148cf7007500dfa55eab68824f1f6cadeeb85f4e3e5aeacda212a46a5e8e3b12c020445c2a730000018362a7973e0000040300463044022059cb5fba86802ff8576c2b864008aa5d2a205f65e273c2a3130ff6a8fc5367be022040bf589b2d326693d68e056ec2dcf241c76300dd782196a032bf2cd5be65dea0
 . . . . [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)
		0002c33bf9790948ccabd47e6c5e804c563ec2ecc480e038b201d2df05fa5800acc6d189dfa7b9909a07947eef12e3527675395f94b9e4ada3dc6a333c3d600de078bc5118a70f2708583caa968c792d3413c70c639342cc06f1aa27167186827900f55055036171c936123814737b71975c00260d2940bf649c78d5942dbb4451588f328e46a7f8c136f8ad2dd1935bdbabe3fbe3d266df756f8aceb564f0a27380d7a51f036008bf902088dd4cbfa88ce35f3b5e775cdfcc0af23a7cd7a434aa05f0e603c92e7dab74cb48b2f1debc40e3652ef7738febdabebd195146b855777e046c1b9a4485efdbd2600b90ebb0275fa023cd57b3bf5101afb45e65d426f2