teach.cps.edu
Issued by R3
About this certificate
This digital certificate with serial number 03:9f:10:26:8e:81:e6:b4:46:9e:24:7b:f4:50:82:74:8a:91 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=teach.cps.edu
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:9f:10:26:8e:81:e6:b4:46:9e:24:7b:f4:50:82:74:8a:91Serial Number (int): 315463221981317134783231214238164525025937
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 84:90:9a:82:1e:4e:c9:a3:03:5d:1c:ae:c4:2b:6f:ab:31:5b:e7:71
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): 8c:c8:5b:25:49:3b:aa:61:70:55:18:67:a8:70:ec:89:3d:5e:3e:15
Fingerprint (sha256): 1a:15:36:01:97:bb:ee:5a:e7:1b:ee:ff:ce:72:fa:c0:48:ed:39:1a:d0:b9:ed:ab:ed:55:d1:43:f0:bf:61:a8
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate teach.cps.edu
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for teach.cps.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
teach.cps.edu
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Certificate
The complete raw certificate details for teach.cps.edu in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFIDCCBAigAwIBAgISA58QJo6B5rRGniR79FCCdIqRMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yMzA0MTUwMDA0NTJaFw0yMzA3MTQwMDA0NTFaMBgxFjAUBgNVBAMT DXRlYWNoLmNwcy5lZHUwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCT noHxOCOJkOaftC8xT89r9ObM3whdT5Zp2fL6ZhIQwAbQvSsqWiSgpkVvLM7xPglh aa4+gHyGBTF5xZvgwsWPQwVFoosNFyWrPb5jIyaDY2oH7D+kqBta475hO+93ojh+ MP/I5UbS8Mk52DAACCSfgxFe88ec0WsWgFfqi50C0l6d3GQXIyWdnkaLoh7chBwV DPlpA3rXBTRwwrKGN84TWfUktHM0EC7apQ8t7rVpkeQ1vUnwIn8F0f8k5ojQXxpW trR8mge9OqpULg7IfwXrjr1AcijBRYQRMH54Phrfe0RPEWIXmJoyLI5djhVhxknB bIji3nxDl3V3doiL9e+tAgMBAAGjggJIMIICRDAOBgNVHQ8BAf8EBAMCBaAwHQYD VR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0O BBYEFISQmoIeTsmjA10crsQrb6sxW+dxMB8GA1UdIwQYMBaAFBQusxe3WFbLrlAJ QOYfr52LFMLGMFUGCCsGAQUFBwEBBEkwRzAhBggrBgEFBQcwAYYVaHR0cDovL3Iz Lm8ubGVuY3Iub3JnMCIGCCsGAQUFBzAChhZodHRwOi8vcjMuaS5sZW5jci5vcmcv MBgGA1UdEQQRMA+CDXRlYWNoLmNwcy5lZHUwTAYDVR0gBEUwQzAIBgZngQwBAgEw NwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYaaHR0cDovL2Nwcy5sZXRzZW5j cnlwdC5vcmcwggEEBgorBgEEAdZ5AgQCBIH1BIHyAPAAdgC3Pvsk35xNunXyOcW6 WPRsXfxCz3qfNcSeHQmBJe20mQAAAYeCcY4rAAAEAwBHMEUCIQD8ldd86+YAPnGr bhwsJOUd0yFNPeeLFMPUGlgOkwwzHAIgHJooGDnqjNy4GtR3n0TQCdjMaBFL2+SG 51yy2dg266IAdgB6MoxU2LcttiDqOOBSHumEFnAyE4VNO9IrwTpXo1LrUgAAAYeC cY5FAAAEAwBHMEUCIEc/Yyh90Y7vsmDJLjUHxKlXIt18V2JwwjTaeCwj2MYiAiEA lvgu2vDeaiHVW4dBnwduDZGb188fzk34jCppQ87zE5wwDQYJKoZIhvcNAQELBQAD ggEBAAQbDuxesBC4w9LhtnRgANsTA13o2J+1sIEW1Qx02jKiHQnVqfB323MlT5QE FOzrCEczatW6BszP+wvV+23yfyYPgxZFWYmJvsS2FD3ThHcqUzRrbi6KQTEy23H+ 4e8VrinFmyxIeIhwYNvJRNQJxzTD7UnF7sE8G6aMJxbHD+cwNOQuQP/2HjLdSj/2 lD3NLxjqabjDW9MvLf5y/LXOb3mv0uagBawhZJINLdH5tOLmdpvbzgDmJrizTv+V Jfnkt+yrCSa7gy6G6RJ5ridUV7sC9EZu/djRZnd9jDcgxoASKnIfXdowvGQjuruQ IebftSnW24bD5eecoXtEoZbsANY= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAk56B8TgjiZDmn7QvMU/P a/TmzN8IXU+Wadny+mYSEMAG0L0rKlokoKZFbyzO8T4JYWmuPoB8hgUxecWb4MLF j0MFRaKLDRclqz2+YyMmg2NqB+w/pKgbWuO+YTvvd6I4fjD/yOVG0vDJOdgwAAgk n4MRXvPHnNFrFoBX6oudAtJendxkFyMlnZ5Gi6Ie3IQcFQz5aQN61wU0cMKyhjfO E1n1JLRzNBAu2qUPLe61aZHkNb1J8CJ/BdH/JOaI0F8aVra0fJoHvTqqVC4OyH8F 6469QHIowUWEETB+eD4a33tETxFiF5iaMiyOXY4VYcZJwWyI4t58Q5d1d3aIi/Xv rQIDAQAB -----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 315463221981317134783231214238164525025937 . . . . . . . . [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 2023-04-15 00:04:52 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-07-14 00:04:51 +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 'teach.cps.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 18635193834317778232627870026805793591546370630933853273872862956544411259717509624493836084035110672236919480053490895744536516238279706733555452976422102119701447078747029944123865810097933574019837020661316637043445024505969982271311996329176782784313530774798407085000778636670064503631067420265276184732540388638502904793266330383762409285561599221925669749031710946604869875015241276850357127819357811952047783261859110503525457906476882804600027659655315092177379743487752306706976226444902433008206367853924189954308642275345046890372814928947586228915559464738979383689339674911617332900118508831445731372973 . . . . . . . . . . . . . . . . . . . . [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) 84909a821e4ec9a3035d1caec42b6fab315be771 . . . . . . . . . . . . . . . . [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 (17 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'teach.cps.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) 00f0007600b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb4990000018782718e2b0000040300473045022100fc95d77cebe6003e71ab6e1c2c24e51dd3214d3de78b14c3d41a580e930c331c02201c9a281839ea8cdcb81ad4779f44d009d8cc68114bdbe486e75cb2d9d836eba20076007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb520000018782718e4500000403004730450220473f63287dd18eefb260c92e3507c4a95722dd7c576270c234da782c23d8c62202210096f82edaf0de6a21d55b87419f076e0d919bd7cf1fce4df88c2a6943cef3139c . . . . [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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