www.taskit.mk.ces.kyutech.ac.jp
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:41:d2:2a:3e:6f:2b:34:d4:b0:64:2d:1a:ff:00:3f:04:bf 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=www.taskit.mk.ces.kyutech.ac.jp
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:41:d2:2a:3e:6f:2b:34:d4:b0:64:2d:1a:ff:00:3f:04:bfSerial Number (int): 283734568867041724050508631091250762548415
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: b2:65:5b:ad:3c:dc:39:30:5d:46:0b:6d:16:cc:82:a2:fe:0f:39:db
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 40:09:f5:c2:c3:a0:fb:df:56:04:87:b0:3a:3b:6f:ea:85:eb:ee:59
Fingerprint (sha256): 12:56:3d:9f:fb:21:4a:27:0e:8c:03:46:e5:b9:99:63:9b:31:cb:fc:da:38:20:2d:ff:07:fa:bb:5f:b5:87:72
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate www.taskit.mk.ces.kyutech.ac.jp
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for www.taskit.mk.ces.kyutech.ac.jp
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
www.taskit.mk.ces.kyutech.ac.jp
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Certificate
The complete raw certificate details for www.taskit.mk.ces.kyutech.ac.jp in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFdzCCBF+gAwIBAgISA0HSKj5vKzTUsGQtGv8APwS/MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTEyMTYwMTA4MzdaFw0y MDAzMTUwMTA4MzdaMCoxKDAmBgNVBAMTH3d3dy50YXNraXQubWsuY2VzLmt5dXRl Y2guYWMuanAwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQC8ZZ1aaGNj j09E0oYiCaS17tJJoXXCuuvyITxEefHfc2g5OWAy0pzx/NC6cG9z1aEiA6NaB3NY 0ipBbtUy/DmKwF6Baw/JK7FbUw2J4vzUbCAbsrVPPSGvoYRPHENwswowIG0zHt1d YOyFI4zu127mYbtCCdglcS4w9VYvla7KrmLSp98JeDTNwHljmE+o5/OAulp0u7hF mGjDJohkwgCdMI3sg6W7apFoaoS2h20x1LevtJSnn325NRboo/Ju0tUdt0LqIWuk iviT6pMIzwGQ6rGY3dm483sX2BCuguzk9N8yPm7eBg8VDpqiy8/YI8TuLuBlISxf fFAMCBwraxfzAgMBAAGjggJ1MIICcTAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYw FAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFLJl W6083DkwXUYLbRbMgqL+DznbMB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/z qOyhMG8GCCsGAQUFBwEBBGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50 LXgzLmxldHNlbmNyeXB0Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50 LXgzLmxldHNlbmNyeXB0Lm9yZy8wKgYDVR0RBCMwIYIfd3d3LnRhc2tpdC5tay5j ZXMua3l1dGVjaC5hYy5qcDBMBgNVHSAERTBDMAgGBmeBDAECATA3BgsrBgEEAYLf EwEBATAoMCYGCCsGAQUFBwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCC AQUGCisGAQQB1nkCBAIEgfYEgfMA8QB2AG9Tdqwx8DEZ2JkApFEV/3cVHBHZAsEA KQaNsgiaN9kTAAABbwx26zUAAAQDAEcwRQIgaVhADDorJrOjqX1QBPXZsD4pkZZe voRzpvzslZvuMb0CIQD2ZhcoYLT1uCXr9xlaGaK5adopqH34Xi2LZzPziwVMqQB3 AAe3XBvlfWj/8bDGHSMVx7rmV3xXlLdq7rxhOhpp06IcAAABbwx26x0AAAQDAEgw RgIhAMMs9AxjPLhauxuTR211G6UffHy8JZstUG62L6DmsjWMAiEAsNfKUJpTc7qQ hZfV4GERD/qKUfL4zKS7QoBbLTynHPkwDQYJKoZIhvcNAQELBQADggEBAJRnUSRI nzqruka0KUEF/PsvUFi0MJbNmwrplQfd4hUnskph90Fb2FeO7xIkqVqPcmVdzjiJ khlflfMDkSDIimC1U/AoWoSH8qnbag1LQ9+ShQvPFbDf2IVOCH8bN3GE2HP8KF9A IS4kr3Mf4OfNHJgP1DPc3+Juntsguzw/e15vxErQv/L4ZI5RSv9wgy86rLXXzHJ0 1yAl5+Dg3SXKnWaq0FWZuoorQiL1lE0o4OIwdqIEvC4feVX6Zdj6Fz5BAAGBg6Ut TnNHXteW6AIJqHbB7ksdJarcpVIshJOax7ZKM9xdTCAWybdmidopqR2c04C5f5Eb gFCYTsjNEAS/Sl0= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvGWdWmhjY49PRNKGIgmk te7SSaF1wrrr8iE8RHnx33NoOTlgMtKc8fzQunBvc9WhIgOjWgdzWNIqQW7VMvw5 isBegWsPySuxW1MNieL81GwgG7K1Tz0hr6GETxxDcLMKMCBtMx7dXWDshSOM7tdu 5mG7QgnYJXEuMPVWL5Wuyq5i0qffCXg0zcB5Y5hPqOfzgLpadLu4RZhowyaIZMIA nTCN7IOlu2qRaGqEtodtMdS3r7SUp599uTUW6KPybtLVHbdC6iFrpIr4k+qTCM8B kOqxmN3ZuPN7F9gQroLs5PTfMj5u3gYPFQ6aosvP2CPE7i7gZSEsX3xQDAgcK2sX 8wIDAQAB -----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 283734568867041724050508631091250762548415 . . . . . . . . [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 2019-12-16 01:08:37 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-15 01:08:37 +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 'www.taskit.mk.ces.kyutech.ac.jp' . . . . . . . . [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 23782909390394127107788771533330943126734165979292157228621311177133664984099941640422560792400106923697814133684689977982794036198206073135558016901015645584897965989615080231653036748893532732799349314417669775409687890123685690431604853542592621066568324088976494133091901679335133135266240955193273057922090831386050473483718509452398570136038518776756558126706843205257868879985852177670383336413732669503211129100648526446911171365871488613722878842543365324846168105324894241300968721143452239462242053299856807362155548896529876353227660695485673414574376685333198835222422159225992898590825828576658169993203 . . . . . . . . . . . . . . . . . . . . [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) b2655bad3cdc39305d460b6d16cc82a2fe0f39db . . . . . . . . . . . . . . . . [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 (35 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.taskit.mk.ces.kyutech.ac.jp' . . . . . . . . . . . . . . . . [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 (246 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes) 00f10076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016f0c76eb35000004030047304502206958400c3a2b26b3a3a97d5004f5d9b03e2991965ebe8473a6fcec959bee31bd022100f666172860b4f5b825ebf7195a19a2b969da29a87df85e2d8b6733f38b054ca900770007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016f0c76eb1d0000040300483046022100c32cf40c633cb85abb1b93476d751ba51f7c7cbc259b2d506eb62fa0e6b2358c022100b0d7ca509a5373ba908597d5e061110ffa8a51f2f8cca4bb42805b2d3ca71cf9 . . . . [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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