ap.cs50.school

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:f5:61:d1:31:af:16:98:27:87:2a:fa:57:cf:4b:a3:64:c4 was issued on by Let's Encrypt.

With 6 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:f5:61:d1:31:af:16:98:27:87:2a:fa:57:cf:4b:a3:64:c4
Serial Number (int): 344836059004255225739578970520501765760196
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: c3:69:16:98:f5:31:2e:11:60:dc:a0:a3:a2:03:ec:90:43:cb:eb:a8
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 0e:4e:f5:4e:67:eb:a0:20:d0:ff:f8:11:e0:a4:77:7f:8e:ff:34:4d
Fingerprint (sha256): cf:34:c0:8d:b0:b5:d1:37:70:60:d3:4e:6f:88:4e:f1:cb:37:9c:e4:32:6e:24:e3:e5:cd:93:af:45:07:d0:12

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

6

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
cs50.io
legacy.cs50.io
mail.cs50.net
office.cs50.net
redirects.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
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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvdrI2NBAP+mm/65iYc2W
XVFhri4YKIBsqCFyuVM+nZtRoM+YHA5XfrbcjV+9lBc0g2NYego/akozmozJIaRU
jhbImGbu25VbPwwipcQ9mcQ3bOo7dFCVSQxv9KJbaFU5n5oZ6sOXrJy7jujXYVvF
/cVN5vPoZtlQcpUF3nHGY2ORE5ymFvxoMatubo3/k2YZGvp8KsFyOCS43SGZXTQ4
UG9pBA1FMNwTNNO3LP98ch2hqC7IK7hp7dALX4c94qy8gXUnPZgxx4gCH83+V9de
mIFQRNBkwVOty3VLXSsjaD/avpReBajSb6xiE3djgX7TNifAjFTt2M31r38MZxh8
xwIDAQAB
-----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 344836059004255225739578970520501765760196
 . . . . . . . . [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 2020-01-18 13:36:08 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-04-17 13:36:08 +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 23966926325280192960627188289498981144001256096525081522261205994053213587898750672369096747388887890823984308052893974142536178716745800262678564825069535864164116973037837784331926903308724411256285423049338867208273483810631636874681250755637137293220071060827930135051435869698230493991743971298495118837451326669214935309057352355956334981410449889212851733923447516872993404672805717672155731740127272610884232876385830423848145151716227885320861752063881622986479456775853384507122974457397640607358762014541563123108013283170837706545205190620626000978500454705652660412312494524438930281705676299003290483911
 . . . . . . . . . . . . . . . . . . . . [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)
							c3691698f5312e1160dca0a3a203ec9043cbeba8
 . . . . . . . . . . . . . . . . [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 (95 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ap.cs50.school'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cs50.io'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'legacy.cs50.io'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.cs50.net'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'office.cs50.net'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'redirects.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)
							00ee00750007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016fb91524c30000040300463044022072dd9f937975b66bcdb3b54414f24294d4f217428a27c9a46ddcfa901e50e69a02203797b3da09ffb6b9b5f4f0d63f0cd6f4c7391da60a1b4257f2502f2cee80588d0075006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016fb915255f000004030046304402204e3a12a57598d7d635862f4e74bed6fc1ebfdb408a33b7ff184ed9333f4ac145022028d9f09520172b9410a48c27ddad09b9ba5090c5573a8c1b82fa2fa68862a499
 . . . . [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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