mu.math.toronto.edu
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:ed:08:54:85:8f:a9:26:1d:6e:5c:bc:4a:a3:5a:88:e8:0e 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=mu.math.toronto.edu
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:ed:08:54:85:8f:a9:26:1d:6e:5c:bc:4a:a3:5a:88:e8:0eSerial Number (int): 341994851441388005603232878969825614424078
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 89:14:b5:98:f3:96:65:bd:c2:6e:5a:b1:53:29:7d:c1:bb:e3:10:64
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 5f:bd:ed:f4:62:e4:8e:4a:4c:dd:aa:4f:b8:98:a1:36:f1:55:4e:3b
Fingerprint (sha256): 10:b7:50:8e:d2:c9:e4:96:1b:7c:e8:e8:41:62:54:7d:ae:e5:3e:6a:4e:98:0e:ef:e6:14:32:b4:70:b5:af:08
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate mu.math.toronto.edu
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for mu.math.toronto.edu
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
mu.math.toronto.edu
mu.math.utoronto.ca
mu.math.utoronto.ca
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cs.toronto.edu
gradapps.cs.toronto.edu
csweb.cs.toronto.edu
pcrs.teach.cs.toronto.edu
csweb.cs.toronto.edu
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se.cs.toronto.edu
*.teach.cs.toronto.edu
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dcsil.cs.toronto.edu
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gradapps.cs.toronto.edu
www.teach.cs.toronto.edu
*.teach.cs.toronto.edu
services.cs.toronto.edu
webfiles.cs.toronto.edu
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csweb.cs.toronto.edu
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bejih.com
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mu.math.toronto.edu
mail.dgp.toronto.edu
pump.math.toronto.edu
markus.teach.cs.toronto.edu
www.taglab.toronto.edu
mpadmin.math.toronto.edu
webfiles.cs.toronto.edu
www.cs.toronto.edu
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Certificate
The complete raw certificate details for mu.math.toronto.edu in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFcjCCBFqgAwIBAgISA+0IVIWPqSYdbly8SqNaiOgOMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDAyMTAxNzA4NDdaFw0y MDA1MTAxNzA4NDdaMB4xHDAaBgNVBAMTE211Lm1hdGgudG9yb250by5lZHUwggEi MA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDfHAyDfYR5joVEGRxcNJ1NI74t 08O6o2TclFEC5OHnU0YmQHR0cx5Nt8BBDMkMYS6wPqcWjMbpUHN16J2c9LNgoTK/ mTxOzBX0j+JnlPK32fCoNPaCyPCRUOGckwNh909iOutjRvmRN23la701t8D8DZ2A nn/jkDeVI4YqooEuag40iBMuHBNsG1pxQ9E16VJ83pSQ+UKcSdnZRcT1Osv3rTTW Fh4647apyxPsZmrkwMpOdejMbQrXcFWLRgU6rfr/JEbpDdCOyelfEaZzAocouVwR P9Pp4j2eAiCrRlszCoAA+Q2QAkgN2DPns87iHSC+XUHPHG6h3u8HGaI+saZfAgMB AAGjggJ8MIICeDAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEG CCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFIkUtZjzlmW9wm5asVMp fcG74xBkMB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsGAQUF BwEBBGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNlbmNy eXB0Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNlbmNy eXB0Lm9yZy8wMwYDVR0RBCwwKoITbXUubWF0aC50b3JvbnRvLmVkdYITbXUubWF0 aC51dG9yb250by5jYTBMBgNVHSAERTBDMAgGBmeBDAECATA3BgsrBgEEAYLfEwEB ATAoMCYGCCsGAQUFBwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCCAQMG CisGAQQB1nkCBAIEgfQEgfEA7wB1ALIeBcyLos2KIE6HZvkruYolIGdr2vpw57JJ Uy3vi5BeAAABcDBKGwMAAAQDAEYwRAIgGnm4wRqf0vg6BG1KkyY+9gEOQNmpCftp wN+wRIejPksCIBHs2tfTn90CTULeetxmAo6/9r/IuqGWNwfnu/GNJnsoAHYAb1N2 rDHwMRnYmQCkURX/dxUcEdkCwQApBo2yCJo32RMAAAFwMEobOAAABAMARzBFAiEA rKDD1nsz9xPgq+RjbNt72Gi4LekIT4RvyiMzgCGNdVUCIEcF3yNLP41mu0ZVMdrY jJ4RBdkTyHM7qw1LEYr6eoa/MA0GCSqGSIb3DQEBCwUAA4IBAQAqn6IfOyk3kBir RThOrQ9xTH8vfyQntQ3mjaoC9jPatWFKvNec3FTTa2sJW3Q8LPLO7vjy1USmXoNd ptenpolos6w1Okn8bjtiZoufvznRjZvyIGIi9T5xd35CP968ZE76RXH5Ey23vq/m CyQmwGLv8AfCTDYJsd6fLsz9hoYcb0vFjOpFAug8dsNMkRa2NCpxJKLQB1CYRAii jnGLAflDsEK/Zo2fKDxZQqpI3ddeQQUYgQ1WYgx3oGETI404ac/xrVzYT7CZ+760 2MfQ6r9JBUhP2MtgLZvYanboR0zs9FsbEin/Bd+KkW6nTQd4JvnD8w09DDMlrQ2U th/hkf5c -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3xwMg32EeY6FRBkcXDSd TSO+LdPDuqNk3JRRAuTh51NGJkB0dHMeTbfAQQzJDGEusD6nFozG6VBzdeidnPSz YKEyv5k8TswV9I/iZ5Tyt9nwqDT2gsjwkVDhnJMDYfdPYjrrY0b5kTdt5Wu9NbfA /A2dgJ5/45A3lSOGKqKBLmoONIgTLhwTbBtacUPRNelSfN6UkPlCnEnZ2UXE9TrL 96001hYeOuO2qcsT7GZq5MDKTnXozG0K13BVi0YFOq36/yRG6Q3QjsnpXxGmcwKH KLlcET/T6eI9ngIgq0ZbMwqAAPkNkAJIDdgz57PO4h0gvl1Bzxxuod7vBxmiPrGm 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 341994851441388005603232878969825614424078 . . . . . . . . [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 2020-02-10 17:08:47 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-05-10 17:08:47 +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 'mu.math.toronto.edu' . . . . . . . . [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 28164973426344970026103125345343032926976059212379016250903139507373613867240219850920494224220361135489832838443886048421875345778738543892171170481141435605604571939997221912418305615390910230039471039913701101254448568813943510751213220623021017392551580202556722351376247106673728456057749282609051217351086138156181792804908728981817378951413151315988386101131968867680350324940937867497410114783174806843973311284246561347072415688561560728781651429395327645324300740521543064909589242718619675725450069991204622726925356938300423350984389886432606090883252324319819416618224801224334235203089110889501614515807 . . . . . . . . . . . . . . . . . . . . [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) 8914b598f39665bdc26e5ab153297dc1bbe31064 . . . . . . . . . . . . . . . . [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 (44 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mu.math.toronto.edu' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mu.math.utoronto.ca' . . . . . . . . . . . . . . . . [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) 00ef007500b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e00000170304a1b03000004030046304402201a79b8c11a9fd2f83a046d4a93263ef6010e40d9a909fb69c0dfb04487a33e4b022011ecdad7d39fdd024d42de7adc66028ebff6bfc8baa1963707e7bbf18d267b280076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d91300000170304a1b380000040300473045022100aca0c3d67b33f713e0abe4636cdb7bd868b82de9084f846fca233380218d755502204705df234b3f8d66bb465531dad88c9e1105d913c8733bab0d4b118afa7a86bf . . . . [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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