support.cs.toronto.edu
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 04:37:d9:79:b0:83:80:67:ae:9a:4f:6d:c0:77:4e:90:e4:28 was issued on by Let's Encrypt.
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=support.cs.toronto.edu
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:37:d9:79:b0:83:80:67:ae:9a:4f:6d:c0:77:4e:90:e4:28Serial Number (int): 367453748230820530492761845105076468769832
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: 45:a0:4f:c3:31:14:6c:ff:80:89:6e:ca:b1:d7:07:f5:72:b7:bc:14
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 2f:1d:4c:b4:ec:72:55:1c:ee:f4:ff:fe:95:75:a9:9f:49:23:38:f8
Fingerprint (sha256): 00:0b:ba:a1:14:0a:ec:94:f0:d3:5e:4d:b4:ef:43:0e:9b:b5:63:8e:16:a9:3b:b4:dd:91:71:8f:1c:85:df:54
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate support.cs.toronto.edu
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for support.cs.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
support.cs.toronto.edu
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gradapps.cs.toronto.edu
csweb.cs.toronto.edu
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csweb.cs.toronto.edu
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gradapps.cs.toronto.edu
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cs.toronto.edu
Certificate
The complete raw certificate details for support.cs.toronto.edu in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGFjCCBP6gAwIBAgISBDfZebCDgGeumk9twHdOkOQoMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODAzMjkyMjQ1MDhaFw0x ODA2MjcyMjQ1MDhaMCExHzAdBgNVBAMTFnN1cHBvcnQuY3MudG9yb250by5lZHUw ggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDTdbDCf5M3YhPx29yU8VoR CnEDAfts1p9stTb9SB8q+ui9dKUbCkBG89wHVfyabApubyUgwigTBr1SCLq3El0e WbiegqfS9d88GiJEwNix17rn8eton4L/Y9cIGCskYgK144Sn3QmP7ZoJU7FX6gle tNx5+v9iGZua8A36B6e/uKK1m0fgmpXSn6NRePlkeIXUliUw5sRrSEADN98C8EOg kFz6Oji4iqmCTwtVyU6pe/moOvT5g/PgUUYbDS008N82jcjSN/zMZZ15Lsmqio/g ml44wWEIdALRN1qXGuKJwzRkpILfJ8C2WH5BqCGs6zWshFGzKpN0HwZZ56jvsH1l AgMBAAGjggMdMIIDGTAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUH AwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFEWgT8MxFGz/gIlu yrHXB/Vyt7wUMB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsG AQUFBwEBBGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNl bmNyeXB0Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNl bmNyeXB0Lm9yZy8wIQYDVR0RBBowGIIWc3VwcG9ydC5jcy50b3JvbnRvLmVkdTCB /gYDVR0gBIH2MIHzMAgGBmeBDAECATCB5gYLKwYBBAGC3xMBAQEwgdYwJgYIKwYB BQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3JnMIGrBggrBgEFBQcCAjCB ngyBm1RoaXMgQ2VydGlmaWNhdGUgbWF5IG9ubHkgYmUgcmVsaWVkIHVwb24gYnkg UmVseWluZyBQYXJ0aWVzIGFuZCBvbmx5IGluIGFjY29yZGFuY2Ugd2l0aCB0aGUg Q2VydGlmaWNhdGUgUG9saWN5IGZvdW5kIGF0IGh0dHBzOi8vbGV0c2VuY3J5cHQu b3JnL3JlcG9zaXRvcnkvMIIBAwYKKwYBBAHWeQIEAgSB9ASB8QDvAHUAVYHUwhaQ NgFK6gubVzxT8MDkOHhwJQgXL6OqHQcT0wwAAAFidCaXBQAABAMARjBEAiAIjeXE G6Ib84igpfW6TZjsT4NGXo016B+NfREbFCyT6wIgNJL4pYg8581LdK4Mzs54Ko+E kMzWOsrtc0TcuoGj3eIAdgApPFGWVMg5ZbqqUPxYB9S3b79Yeily3KTDDPTlRUf0 eAAAAWJ0JpbvAAAEAwBHMEUCIQCyMPiAPdbaff3+V/CEUmCixTXXzUiPqrQImpAN YKlyAgIgAVkwcmFnDlBkvPOCxA6Jl7/yIWzJynvnDA3MX2YWOKkwDQYJKoZIhvcN AQELBQADggEBAGDUoDYWdOIg7cKdwfpAOU7d7umAG7nDuayLQsCZGfy8HRPDOEeF UOGeVWSyVcNdJ+VfwosT1aWk/gq+aRRUFXClM8HaaFxm+3cOVqjPAxVZCYhhT8pb hxW/3a0haxtObFEy+vbs6l+9WHwfboWFSUT6J/k4JsjgUcAb+FfgcXnbA/NqmdkX IGTadxLJvah5G1X4WL0Jt7NEUPDXLy9rVL8IKciga7+X0lrj+BlN2sGobn7YWtG4 t5dfQIg9pRbeV4Xx3jgxDRpY0/KMfGA+yPF8ks9OMknZRNI2EBZTStLsu+i00NUH NN091+g2MUIKTj1chlWTRNFvbwxFZP0iFXQ= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA03Wwwn+TN2IT8dvclPFa EQpxAwH7bNafbLU2/UgfKvrovXSlGwpARvPcB1X8mmwKbm8lIMIoEwa9Ugi6txJd Hlm4noKn0vXfPBoiRMDYsde65/HraJ+C/2PXCBgrJGICteOEp90Jj+2aCVOxV+oJ XrTcefr/YhmbmvAN+genv7iitZtH4JqV0p+jUXj5ZHiF1JYlMObEa0hAAzffAvBD oJBc+jo4uIqpgk8LVclOqXv5qDr0+YPz4FFGGw0tNPDfNo3I0jf8zGWdeS7JqoqP 4JpeOMFhCHQC0TdalxriicM0ZKSC3yfAtlh+QaghrOs1rIRRsyqTdB8GWeeo77B9 ZQIDAQAB -----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 367453748230820530492761845105076468769832 . . . . . . . . [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 2018-03-29 22:45:08 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-06-27 22:45:08 +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 'support.cs.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 26694317680521529013023673597744968626342598416126571182044587299981493908292867503221284096283707970292214554135753930588184928902130687586044485147246751916193182689276734159586580655946425138410207904047404180956323873014468401822919783560693826668390488593371690342158642588830735869344292529708129335242733200438194709864013959714391871257642119488711181609641336172524587149563877480516971340456964647859121258330842907537274177567403490606319025230942692460290066728338880600485849252731621145881117330362092248937928102595313677099323265932211944227880519180644713502563942785604630929756484384865052238314853 . . . . . . . . . . . . . . . . . . . . [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) 45a04fc331146cff80896ecab1d707f572b7bc14 . . . . . . . . . . . . . . . . [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 (26 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'support.cs.toronto.edu' . . . . . . . . . . . . . . . . [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 (246 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 1.3.6.1.5.5.7.2.2 (unotice) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String 'This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/' . . . . . . . . . . . . . . . . [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) 00ef0075005581d4c2169036014aea0b9b573c53f0c0e43878702508172fa3aa1d0713d30c000001627426970500000403004630440220088de5c41ba21bf388a0a5f5ba4d98ec4f83465e8d35e81f8d7d111b142c93eb02203492f8a5883ce7cd4b74ae0ccece782a8f8490ccd63acaed7344dcba81a3dde2007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f47800000162742696ef0000040300473045022100b230f8803dd6da7dfdfe57f0845260a2c535d7cd488faab4089a900d60a9720202200159307261670e5064bcf382c40e8997bff2216cc9ca7be70c0dcc5f661638a9 . . . . [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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