ictf.cs.ucsb.edu
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 04:ee:3e:82:06:d4:62:f3:a5:15:10:3f:a2:77:ad:5d:f1:38 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=ictf.cs.ucsb.edu
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:ee:3e:82:06:d4:62:f3:a5:15:10:3f:a2:77:ad:5d:f1:38Serial Number (int): 429519434327076067356940241998393364050232
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: 95:a0:21:d4:08:3c:5e:68:8c:c7:b4:31:54:38:cc:c6:62:f2:97:f7
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 4d:ab:11:d2:ca:17:51:16:56:cf:c1:db:c7:a9:13:86:60:a2:5b:e1
Fingerprint (sha256): 00:34:66:f3:c2:80:70:6e:c1:dc:c0:dc:ca:f4:d7:49:47:1c:69:72:bc:8b:c1:b1:f4:e1:43:a5:99:75:d0:4d
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate ictf.cs.ucsb.edu
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for ictf.cs.ucsb.edu
Public Key Algorithm
RSA
Key Size
4096
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
ictf.cs.ucsb.edu
ictf.seclab.cs.ucsb.edu
ictf.seclab.cs.ucsb.edu
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Certificate
The complete raw certificate details for ictf.cs.ucsb.edu in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGLzCCBRegAwIBAgISBO4+ggbUYvOlFRA/onetXfE4MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODAzMDYxODE4MzBaFw0x ODA2MDQxODE4MzBaMBsxGTAXBgNVBAMTEGljdGYuY3MudWNzYi5lZHUwggIiMA0G CSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQChP4noQa//AjxSLW7DlFB0wfhxXfXs JsUvDRC0kC30rB9TP+ZTeWk5GoYPiuJwZUFoO+GS4tx68PsIH/+3AFHAlq8DGYsW l9EBdC13+FlTUAPECu0ToKt5VSftVX9XSlscd8cwADQjVO58NdIvIoIJDo75Knlh 9MoEY1MujaoH4YHj76WZGtVkB8FoIwYf1OCgEgkW3b7vZOaVlctbEk2CNuSPasbG V+ftKF9cM4FdtZ2sTe7V9yLOxt8l/bwbhMqRckRYWxjmJEvITPnuNxmlrwgJ5ckJ kuhDcL/H7q2L8f305yhdwD6sx2byOjk1r0INMMc9aejZfc3nps34a6sPJbgkqHKc Te6dFWgwW/cL4VE4IhKoKYin+Bg8fYHoXLqVx6vgVyAgyLLOnmEOqovmUa3KExdh YicyAyexXLcDnaQtcrwF+813kpQ+6uGECwIk4dTm7PIfqG6TWSvFk9QrG60Lx0QZ sSg7+BDqvpE7UwXFJZSpJAl/HJ+PyyJ3LzB3DKRPhSlNue70kSeoyJ1rfOUVvO8U U3v0KgnTDqqz2La6aO4r2EKlOCDfUKYCYAy8wvSdo9ULtctPdiybuqJ4d6nyFTHj WISPtx6rGELed8VzfpL73OzTN4yXgWvLIwB4ky0ZWb4x1EOm/+GdzuQgFS+mk9aE M3NTZS8KeWPw0QIDAQABo4ICPDCCAjgwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQW MBQGCCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBSV oCHUCDxeaIzHtDFUOMzGYvKX9zAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv 86jsoTBvBggrBgEFBQcBAQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmlu dC14My5sZXRzZW5jcnlwdC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0Lmlu dC14My5sZXRzZW5jcnlwdC5vcmcvMDQGA1UdEQQtMCuCEGljdGYuY3MudWNzYi5l ZHWCF2ljdGYuc2VjbGFiLmNzLnVjc2IuZWR1MBEGCCsGAQUFBwEYBAUwAwIBBTCB /gYDVR0gBIH2MIHzMAgGBmeBDAECATCB5gYLKwYBBAGC3xMBAQEwgdYwJgYIKwYB BQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3JnMIGrBggrBgEFBQcCAjCB ngyBm1RoaXMgQ2VydGlmaWNhdGUgbWF5IG9ubHkgYmUgcmVsaWVkIHVwb24gYnkg UmVseWluZyBQYXJ0aWVzIGFuZCBvbmx5IGluIGFjY29yZGFuY2Ugd2l0aCB0aGUg Q2VydGlmaWNhdGUgUG9saWN5IGZvdW5kIGF0IGh0dHBzOi8vbGV0c2VuY3J5cHQu b3JnL3JlcG9zaXRvcnkvMA0GCSqGSIb3DQEBCwUAA4IBAQBABKwUZJjsk4k0cIwJ xMvhwzHkH6Sfl7yHZzff1FeLFtuP1A2s9j0MQv4wUNxkgakG7ltV5LexuYsYWM28 7jd/qezCSx3IUAqannQ/SbQQHTAJzpUEGJRAjPCo7IC0SjvhXbIIebqcw9O27304 nQpfqNT21MUnpZYNF0Ow6LXX554mM4q6szbRg3aCBMiVTTfYkOSvUc4/GedsSR8J v8GET/OWjeKGW88cyU4jREaVC4xm2cIi0WmaOEIYv//GC4hzwM5R3p4lmlWRbw6e ICNx3rA2w7qay+iTDQ+0KCZ5eD1VIbk23xIzaiPcowF5960ZGSAhr8NX2WVWuKGr vz3M -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAoT+J6EGv/wI8Ui1uw5RQ dMH4cV317CbFLw0QtJAt9KwfUz/mU3lpORqGD4ricGVBaDvhkuLcevD7CB//twBR wJavAxmLFpfRAXQtd/hZU1ADxArtE6CreVUn7VV/V0pbHHfHMAA0I1TufDXSLyKC CQ6O+Sp5YfTKBGNTLo2qB+GB4++lmRrVZAfBaCMGH9TgoBIJFt2+72TmlZXLWxJN gjbkj2rGxlfn7ShfXDOBXbWdrE3u1fcizsbfJf28G4TKkXJEWFsY5iRLyEz57jcZ pa8ICeXJCZLoQ3C/x+6ti/H99OcoXcA+rMdm8jo5Na9CDTDHPWno2X3N56bN+Gur DyW4JKhynE3unRVoMFv3C+FROCISqCmIp/gYPH2B6Fy6lcer4FcgIMiyzp5hDqqL 5lGtyhMXYWInMgMnsVy3A52kLXK8BfvNd5KUPurhhAsCJOHU5uzyH6huk1krxZPU KxutC8dEGbEoO/gQ6r6RO1MFxSWUqSQJfxyfj8sidy8wdwykT4UpTbnu9JEnqMid a3zlFbzvFFN79CoJ0w6qs9i2umjuK9hCpTgg31CmAmAMvML0naPVC7XLT3Ysm7qi eHep8hUx41iEj7ceqxhC3nfFc36S+9zs0zeMl4FryyMAeJMtGVm+MdRDpv/hnc7k IBUvppPWhDNzU2UvCnlj8NECAwEAAQ== -----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 429519434327076067356940241998393364050232 . . . . . . . . [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 2018-03-06 18:18:30 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-06-04 18:18:30 +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 'ictf.cs.ucsb.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 (4208 bits) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 657835254644124630595385791690592295603316545457000809352024028823963820464683383167536542490770570175012300570987632457664580496633241688279743634343114407113775202201974823997114969622409455319849626539467545297720885484223565803039937684230136032548496896921427422020819643885618184808408127580558065072109987377349587758385372000796306560142094971943398491100396143005326284647424960326186887024524140614841185840799972291754745995323722634861418699972490635962323525330108695976807794911633178757691990244555193981316908053383445426416423050944184705682871295323527471442451517033128071778294607757338081927656606904744372911923185602213543284945116667343513188623371921444700438546175860791939641915730480775104031054452853278563778154121372112401112558326923935759591396303430142886076733663029101008475984586010131586080060667037639595919836601913653570095129405714193242048128888659841027920878633276386256135410960103666258151458706055471357168814691039731351040351474451499850517044680673884379544941664176084236837286073779365764815843998115690966456036537891829610741675268994773721385235474207906210739202812168717640109604855891566995767342821095887975954314084286072174837485098374283743640079295493637410148480970961 . . . . . . . . . . . . . . . . . . . . [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) 95a021d4083c5e688cc7b4315438ccc662f297f7 . . . . . . . . . . . . . . . . [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 (45 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ictf.cs.ucsb.edu' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ictf.seclab.cs.ucsb.edu' . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.24 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (5 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 5 . . . . . . . . . . . . . . . . [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 1.2.840.113549.1.1.11 (sha256WithRSAEncryption) . . . . . . . . [c:0|t:5|false] NULL . . . . [c:0|t:3|false] BIT STRING (2048 bits) 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