fyi.cs.it-chiba.ac.jp
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:f1:cd:c5:a3:b4:b1:34:c7:c6:9a:d8:32:b5:43:e1:e9:56 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=fyi.cs.it-chiba.ac.jp
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:f1:cd:c5:a3:b4:b1:34:c7:c6:9a:d8:32:b5:43:e1:e9:56Serial Number (int): 343618426165192626051618480903394502502742
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 70:87:3c:b3:c1:56:42:c0:74:a6:ca:2b:bd:57:d8:11:6a:7e:76:28
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): d8:2f:aa:52:53:c4:4b:cc:12:2f:66:11:d4:6b:21:74:a5:ea:6b:f6
Fingerprint (sha256): 14:7a:6f:99:13:22:3d:30:de:de:5e:a7:7d:5b:1f:7c:56:e0:11:ec:0f:50:66:7a:02:40:fb:97:ff:97:06:49
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate fyi.cs.it-chiba.ac.jp
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for fyi.cs.it-chiba.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
fyi.cs.it-chiba.ac.jp
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Certificate
The complete raw certificate details for fyi.cs.it-chiba.ac.jp in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFYDCCBEigAwIBAgISA/HNxaO0sTTHxprYMrVD4elWMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDAzMDgxNDMwMTVaFw0y MDA2MDYxNDMwMTVaMCAxHjAcBgNVBAMTFWZ5aS5jcy5pdC1jaGliYS5hYy5qcDCC ASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAKuPJjaw4TwaQBO8pUHK7uYL UNFRgYH/9r1jeqj0CtazaW0kx6MHKIDS74+mEkcKfvya50GYGOaPYHkRypxUN+f+ fRZRav9yfmEiEg7OEcbMZGurEWtJlxlmveAgbX8Q7o47azOqpvGjSRCh3/DLEQqd y564qrWGUZ3uQOzbnTl2+/F6eGtH+meHoIIgXPT68cMBAOEBeMxdag9+YDIH9stv pG9TMYpIAZS99S1k4DUidEWLJAp/YOX/qeyD6SCBqeWzYHQNzYJ6z6RlO5M85MQS Fw6JCdBL6UkwMzVoeEQb8jqa0Tm8okhJy9Z2Dz6B1wHgAbZWPnxKyKgrjdUxP9sC AwEAAaOCAmgwggJkMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcD AQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUcIc8s8FWQsB0psor vVfYEWp+digwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo7KEwbwYIKwYB BQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMubGV0c2Vu Y3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMubGV0c2Vu Y3J5cHQub3JnLzAgBgNVHREEGTAXghVmeWkuY3MuaXQtY2hpYmEuYWMuanAwTAYD VR0gBEUwQzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYa aHR0cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcwggECBgorBgEEAdZ5AgQCBIHzBIHw AO4AdQBvU3asMfAxGdiZAKRRFf93FRwR2QLBACkGjbIImjfZEwAAAXC6xKh5AAAE AwBGMEQCIFePjST0LFQEX2L/pycHygYpXmSKT+jmLgSItXnKzjHdAiBBILoJSEQi +xEluH9ZYW1FXwp10OJKFHkaAJq7f6h6XgB1AAe3XBvlfWj/8bDGHSMVx7rmV3xX lLdq7rxhOhpp06IcAAABcLrEqGIAAAQDAEYwRAIgLeAhKDm5187m7KNw1JePecX2 ogRa585/QZi4DY2DoPsCIGep1ODy2nlrookhnhjnmbpLStk9Js5xzBhp+D4rmHyk MA0GCSqGSIb3DQEBCwUAA4IBAQADrNHRdxylkM4DgKrt+6zosc+Tw//FXw6hnr7a 07zVLYrd9OCN7ObU6raHTTke2g6RM+R/m/aWHKti8G3PS+4xpLxOIKjRzmmXYP4h a4jyAnpSKvplf5SRl2LP71V7fUZs/pcm7NW7ev9Oi/4GDLl24F4b27i2xHlHL0M7 S/NmcG86XTJcszvgwOwFxjCwISkwH+JHfVfJcf3fxEqLAn3E5BNkzRSVxgspoID+ jULe6wMsbiS/sQl8I+BBBMo3PuA2l+P72OuYxKYAyGxUgRrXVWKVjhkhpDT57iZj GSxG6DNjaju/CQs/Dljll+ZtcOUnfktVtbImgXARgmUaPxNA -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAq48mNrDhPBpAE7ylQcru 5gtQ0VGBgf/2vWN6qPQK1rNpbSTHowcogNLvj6YSRwp+/JrnQZgY5o9geRHKnFQ3 5/59FlFq/3J+YSISDs4Rxsxka6sRa0mXGWa94CBtfxDujjtrM6qm8aNJEKHf8MsR Cp3LnriqtYZRne5A7NudOXb78Xp4a0f6Z4eggiBc9PrxwwEA4QF4zF1qD35gMgf2 y2+kb1MxikgBlL31LWTgNSJ0RYskCn9g5f+p7IPpIIGp5bNgdA3NgnrPpGU7kzzk xBIXDokJ0EvpSTAzNWh4RBvyOprRObyiSEnL1nYPPoHXAeABtlY+fErIqCuN1TE/ 2wIDAQAB -----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 343618426165192626051618480903394502502742 . . . . . . . . [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 2020-03-08 14:30:15 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-06-06 14:30:15 +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 'fyi.cs.it-chiba.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 21657339686135909014790014897683131142780715258471859964915653029808089117013289619887420955740423386711751549480941131561969339173728980027232864469545491421488421616021381423820001497553470823152722094538397060772532171456982128627608094260750452427461264186352502498004333786455969467657553230251484681635500124224850885542216364726698250059222689389575232374906927603113532201442836428203293539092746610700981240783789692875225970232109899336210964889839263049246596953822689719599224916425733598811821584288389528938080210178129335526284088833071916385093879841907338321461075738026512184200921861657818429472731 . . . . . . . . . . . . . . . . . . . . [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) 70873cb3c15642c074a6ca2bbd57d8116a7e7628 . . . . . . . . . . . . . . . . [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 (25 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'fyi.cs.it-chiba.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 (243 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes) 00ee0075006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d91300000170bac4a87900000403004630440220578f8d24f42c54045f62ffa72707ca06295e648a4fe8e62e0488b579cace31dd02204120ba09484422fb1125b87f59616d455f0a75d0e24a14791a009abb7fa87a5e00750007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c00000170bac4a862000004030046304402202de0212839b9d7cee6eca370d4978f79c5f6a2045ae7ce7f4198b80d8d83a0fb022067a9d4e0f2da796ba289219e18e799ba4b4ad93d26ce71cc1869f83e2b987ca4 . . . . [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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