utcp.c.u-tokyo.ac.jp
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:f3:36:44:55:db:87:4c:0f:d6:9f:41:f2:e3:0b:ce:f9:bf was issued on by Let's Encrypt.
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We have idenified some issues with this certificate:
- Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)
Certificate Subject
CN=utcp.c.u-tokyo.ac.jp
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:f3:36:44:55:db:87:4c:0f:d6:9f:41:f2:e3:0b:ce:f9:bfSerial Number (int): 344097606086425208717385898228321803499967
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: c0:d0:fe:98:b5:9f:09:58:23:ca:9d:2b:b5:9e:a6:c0:f9:33:51:3e
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): f0:b5:57:23:f7:ff:46:99:6b:87:a1:c7:59:55:b2:17:95:dd:0f:a8
Fingerprint (sha256): 04:7c:c1:67:af:37:74:64:c8:ae:03:d2:70:a1:aa:99:5a:a5:85:a0:50:1e:f8:67:b3:8a:00:8d:f3:87:1f:55
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate utcp.c.u-tokyo.ac.jp
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for utcp.c.u-tokyo.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
utcp.c.u-tokyo.ac.jp
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Certificate
The complete raw certificate details for utcp.c.u-tokyo.ac.jp in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFXzCCBEegAwIBAgISA/M2RFXbh0wP1p9B8uMLzvm/MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDAzMjQyMzUwNTFaFw0y MDA2MjIyMzUwNTFaMB8xHTAbBgNVBAMTFHV0Y3AuYy51LXRva3lvLmFjLmpwMIIB IjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA6qIDPtjql2m6WxvjTkXeklCq KtMwcspFaRi6dOvlI+7KTvmS+iMXdO1SR/KoMp9emPuRD4OXTl9gGe3UFhKWLMu1 NBFH7lMfe+jwfA5eEllYNX2odEoy4LWzFqXYUNCthZeemVjnE7r3Kf35Z19sENc3 +6azZN1oRq+wVaGEhpX/5CCMc2SzSDf6BTbZtdu3t52OUsieWlgrDD++ye+DqQKE hh7A0kZYELpUbj78zpjgnqoxADDfpSvrXpb2ZDShZqvjDkDL2cSQKlLtoAqyPWQS XsuQAk3vX4hW2hzagk8skeQ1hoxQcYJ8nwNual4R3Qy1/XiFapVSzMk08eO1lwID AQABo4ICaDCCAmQwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMB BggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBTA0P6YtZ8JWCPKnSu1 nqbA+TNRPjAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86jsoTBvBggrBgEF BQcBAQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14My5sZXRzZW5j cnlwdC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5sZXRzZW5j cnlwdC5vcmcvMB8GA1UdEQQYMBaCFHV0Y3AuYy51LXRva3lvLmFjLmpwMEwGA1Ud IARFMEMwCAYGZ4EMAQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0 dHA6Ly9jcHMubGV0c2VuY3J5cHQub3JnMIIBAwYKKwYBBAHWeQIEAgSB9ASB8QDv AHUAXqdz+d9WwOe1Nkh90EngMnqRmgyEoRIShBh1loFxRVgAAAFxDyupQwAABAMA RjBEAiBPfYUAZMKI0IOUtQYN9KesUhc8la7HAT6bpR7jEwduwAIgZKaWXW2gwK/B eThV7HWGp7OOuKWhN8G/O2U/2M9NCx8AdgCyHgXMi6LNiiBOh2b5K7mKJSBna9r6 cOeySVMt74uQXgAAAXEPK6kyAAAEAwBHMEUCIFlhMqvDYvxayjKBR55OVMN6HQkK Pc3Iuo3MIXzX7swTAiEAzRjsJ06lFtzEI4tTEvMsgVPjKzG+mCfGt/XibgwiECww DQYJKoZIhvcNAQELBQADggEBADoe9pWHoGODKbxMNUoML/LQ3xL86y08PEy5lP45 vtLXcJvOL0TN57n9ccukr1C3N1OL9Wf1x7EkiiS3a1qOt0zfWQ5ZkpYTztA9LZKe gOT3Gw2lZzNNfYU1zcPNWuFqDxig9h4GZdMNl1cLri2cot834MpwmzILI8iXO3Ml BljRc8BIlxcfJJ8xRXzytUQ5HsVtuHKi5hQKQ2OtskpDek1S4VDrQN8pgD02oALz dbfQvjnrnWNewBXc3g0oXohrtt2P8SQTGLCLhmxR3p6JzpObsVVuMfYmJFgt7yuD LUyX/joQG8zbaZY2hkraSnunZ0C5SHQoMYjAcqKIA8GXKYs= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA6qIDPtjql2m6WxvjTkXe klCqKtMwcspFaRi6dOvlI+7KTvmS+iMXdO1SR/KoMp9emPuRD4OXTl9gGe3UFhKW LMu1NBFH7lMfe+jwfA5eEllYNX2odEoy4LWzFqXYUNCthZeemVjnE7r3Kf35Z19s ENc3+6azZN1oRq+wVaGEhpX/5CCMc2SzSDf6BTbZtdu3t52OUsieWlgrDD++ye+D qQKEhh7A0kZYELpUbj78zpjgnqoxADDfpSvrXpb2ZDShZqvjDkDL2cSQKlLtoAqy PWQSXsuQAk3vX4hW2hzagk8skeQ1hoxQcYJ8nwNual4R3Qy1/XiFapVSzMk08eO1 lwIDAQAB -----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 344097606086425208717385898228321803499967 . . . . . . . . [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 2020-03-24 23:50:51 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-06-22 23:50:51 +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 'utcp.c.u-tokyo.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 29619654791037828616533222344289099787866846165378909818202067962075703434853432743458637269888645247799830899143433764674379387992458485642503172352398623803667787119377791435881078300854236254868150040932879014226587222201834618679450530615324485263978844516721070584068249541751945892438268118692174754940429252702992177176887396057757895243240324637415259052855081864802290183753725909254886611342762260139897275870426740146380358049616660474218221759784660590496537919031382616183697518513026523267483638368032837860012984381281347216523945390434403934656025767700290613059909467877639435194895309338049215968663 . . . . . . . . . . . . . . . . . . . . [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) c0d0fe98b59f095823ca9d2bb59ea6c0f933513e . . . . . . . . . . . . . . . . [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 (24 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'utcp.c.u-tokyo.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 (244 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes) 00ef0075005ea773f9df56c0e7b536487dd049e0327a919a0c84a112128418759681714558000001710f2ba943000004030046304402204f7d850064c288d08394b5060df4a7ac52173c95aec7013e9ba51ee313076ec0022064a6965d6da0c0afc1793855ec7586a7b38eb8a5a137c1bf3b653fd8cf4d0b1f007600b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e000001710f2ba93200000403004730450220596132abc362fc5aca3281479e4e54c37a1d090a3dcdc8ba8dcc217cd7eecc13022100cd18ec274ea516dcc4238b5312f32c8153e32b31be9827c6b7f5e26e0c22102c . . . . [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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