webfiles.cs.toronto.edu

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:0b:48:ba:c9:01:bc:c2:c0:db:83:9a:aa:08:c2:b8:b9:62 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=webfiles.cs.toronto.edu

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:0b:48:ba:c9:01:bc:c2:c0:db:83:9a:aa:08:c2:b8:b9:62
Serial Number (int): 265176638091225241579455922374010318928226
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 8f:35:45:05:98:73:7a:ae:39:8e:c7:9b:f9:ed:97:0e:95:75:93:4c
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): b9:18:9d:a8:c3:cc:68:a2:84:f1:f1:5d:16:a7:68:c5:49:d9:20:99
Fingerprint (sha256): 01:5a:48:93:53:a9:40:12:08:b4:84:e6:91:79:25:2e:ca:09:de:27:7e:a4:70:45:2a:da:52:bb:3e:5a:93:1f

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 webfiles.cs.toronto.edu

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for webfiles.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

webfiles.cs.toronto.edu

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support.cs.toronto.edu
csweb.cs.toronto.edu
pcrs.teach.cs.toronto.edu
bejih.com
mail.math.toronto.edu
dcsil.cs.toronto.edu
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
csweb.cs.toronto.edu
godzilla.cs.toronto.edu
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dcsweb.cs.toronto.edu
openbsd.cs.toronto.edu
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openbsd.cs.toronto.edu
industryday.cs.toronto.edu
itstatus.math.toronto.edu
ug251.eecg.toronto.edu
internal.ece.toronto.edu
plan.cs.toronto.edu
tapp-dev.cs.toronto.edu
services.cs.toronto.edu
courseography.cdf.toronto.edu
www.cdf.toronto.edu
www.cdf.toronto.edu
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socialissues.cs.toronto.edu
cairo.csl.toronto.edu
csweb.cs.toronto.edu
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aasdsloth.gsm.cornell.edu
openbsd.cs.toronto.edu
hisokusa.cs.toronto.edu
tapp.cs.toronto.edu
mathplus.math.toronto.edu
cs.toronto.edu
gradapps.cs.toronto.edu
csweb.cs.toronto.edu
pcrs.teach.cs.toronto.edu
csweb.cs.toronto.edu
usra.cs.toronto.edu
se.cs.toronto.edu
*.teach.cs.toronto.edu
bejih.com
dcsil.cs.toronto.edu
cs.toronto.edu

Certificate

The complete raw certificate details for webfiles.cs.toronto.edu in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1zUobdSKAN0+IVCvikNU
bdepWaSNeF9YNf3u5VFr1sUecHHuSFM2JXvhZc5G4+E8f6mdMP7rRiLjcnuGA9Xu
lDOAdYuxJLV8a8B9a4AxcESxYzeuHc+mtOusVyIWt954oPoKcSdyUyNIbB6WX5wl
3w/AyRa1/sBDCyTMUPC6gW2BCx86Q3j/hQQsL2ynDndfrablOV7Jcc1QXWYbiS1K
FxJGuI/gUbj40jKgpTZMNALBvo0SJi0Od9O46OeKjMP8MfLma61RlJKciFqvorVm
t8Y7IIG6GHVJcrlHfXej9nm4oszlYe6Nmk/4wcK3i/pL68hOWFBj4O9CTI3UKwEl
1wIDAQAB
-----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 265176638091225241579455922374010318928226
 . . . . . . . . [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 2019-02-23 07:08:08 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-05-24 07:08:08 +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 'webfiles.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 27167448717929707373704629477490346058454652831970667586891548298268835415953096361164119102780666600685980006276229527519044231011637882364743586578349963507330417768767686506177119223034473491943918709094626462965047426039541775727604578178905627744948006430134998655799269774773932019521122679990549286408663659104292868039425690304940515036139353742659959738480729853837394143408376376122615228145115678662140653978911445820534182041678290186231078013733097248541971337326621746562576750041166335964106408322651698239471201485782487632420423118196963947132193879356299390471363104684912169243508099177619126298071
 . . . . . . . . . . . . . . . . . . . . [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)
							8f35450598737aae398ec79bf9ed970e9575934c
 . . . . . . . . . . . . . . . . [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 (27 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'webfiles.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 (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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007700747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc56000001691965ae990000040300483046022100e26fbb4a3f8fbe18ab7e9a88322ff45d0aed63228bd2d3cc414b97bacf8d9da0022100c52f08f819f51cfb9d0814754e51a4c931bfa20e167f813c00b3d3f2af117531007500293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f478000001691965b075000004030046304402200392949ba39af3742c1d60dbf5ea800852ed6f7f6c5f512890c918cc4e8c514f022044357e73832e64f15bd1260b7581b37e8122c4b38fe8265b7a4e9a859b33896e
 . . . . [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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