yushikai.co.uk
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:76:b7:2a:6c:c8:2d:d5:fa:6f:72:bf:a9:3f:6f:7a:a6:10 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=yushikai.co.uk
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:76:b7:2a:6c:c8:2d:d5:fa:6f:72:bf:a9:3f:6f:7a:a6:10Serial Number (int): 301733646098008231902573986729666379687440
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 97:ef:56:1d:a4:b1:d4:ba:fc:a1:6e:82:2b:61:aa:0f:52:18:42:d4
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 6d:2d:ba:a6:09:1e:ae:96:5d:5f:af:b8:96:99:c2:cd:d8:e5:f4:e7
Fingerprint (sha256): 51:d3:26:65:ca:35:48:b6:9c:28:1b:2d:9b:b8:58:eb:6b:79:43:9a:e8:21:ac:1b:cd:40:31:c9:2c:27:96:40
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate yushikai.co.uk
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for yushikai.co.uk
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
www.yushikai.co.uk
yushikai.co.uk
yushikai.co.uk
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yushikai.co.uk
yushikai.co.uk
www.yushikai.co.uk
yushikai.co.uk
yushikai.co.uk
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yushikai.co.uk
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yushikai.co.uk
yushikai.co.uk
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*.yushikai.co.uk
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yushikai.co.uk
Certificate
The complete raw certificate details for yushikai.co.uk in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGZzCCBU+gAwIBAgISA3a3KmzILdX6b3K/qT9veqYQMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTAyMjAwMjM1NThaFw0x OTA1MjEwMjM1NThaMBkxFzAVBgNVBAMTDnl1c2hpa2FpLmNvLnVrMIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA20tEertsSF4ZzmPVQSc0p55g0WtSSP11 PmsSKT9DiUpppp1tsxWYLyF/3BQXTUdcAgBf1fKgDa5RjSQNXVNNmABLaS0xcpa/ tdaU6vRe8ykPlmYAWSCaxlIR2GQSfDl8XVbB96eOrxItYHvd1rUYPw9MJToBp0fL D/PKb2wKuxzvssXJ6uZ9RoFbeIRGs6voh8jEt6hvSlmyPwJ0R6pDus6Bn8MiBrot X4Q0Uactp6kCkLMI1l8dlYdidbkqjMiIK7PiQ5gK+2X1JelrJ9iL078AlxxPRg8c MUaCmAl625pDqErWjG7vlKBPnKIiJCKUm91qmpf7kZY1KFR+4m5UT877bXJBNJi8 FDjk2SRNHst0++WDwYQQmIwnTYxz39WMDp68yVklDpC3gJgAJbWBbbt+jK2oO9XY Sdgem6AIjG3PXrUy7B3cNkZ6TjdoQTJFBsM5y8Egcv1aSE9EUULa3zIGH5YCwXV1 0LAyBgXCsH87NJHrcfF0epJcx0g14tMOlypEQTN5JAYhPlQmXgl6y5Tjm1Bghh9M kB2BrG8LYYnVeaha576D35opuIWtgT89Yw/LKF9UjtISJlXe2Xs0pvthYG8+TkTT h9peRbog0dXy3gzTIiVZ1XW4vOi/+4rl6UO40mxhSeKcugRE9+OzInIJm561FHlF 4OVyRStkwWsCAwEAAaOCAnYwggJyMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUl+9W HaSx1Lr8oW6CK2GqD1IYQtQwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwbwYIKwYBBQUHAQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQt eDMubGV0c2VuY3J5cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQt eDMubGV0c2VuY3J5cHQub3JnLzAtBgNVHREEJjAkghJ3d3cueXVzaGlrYWkuY28u dWuCDnl1c2hpa2FpLmNvLnVrMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQB gt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3Jn MIIBAwYKKwYBBAHWeQIEAgSB9ASB8QDvAHUAdH7agzGtMxCRIZzOJU9CcMK//V5C IAjGNzV55hB7zFYAAAFpCPlxKAAABAMARjBEAiBCcSHCVPAp2Fe3bhlrVYleYxe9 CaW/R1PPcHDIgBxc7wIgNpvHcsLdtHJbqJNNLmdAcd3ghbu3vbt+yc3pmuZLsOQA dgApPFGWVMg5ZbqqUPxYB9S3b79Yeily3KTDDPTlRUf0eAAAAWkI+XEhAAAEAwBH MEUCIQDuCSG12aXyrN+psVJqU4P5g+sSIq6BXDHgllwDzflE1AIgCeP5neQV5eaM hazCkmp2D/GJxCegcGV7iMckvFcmYrMwDQYJKoZIhvcNAQELBQADggEBACXOMpLp /04HPYRPH/74+2ikuUEJWWtOdD9NUOznh0Tg01Hsm9YRRE5/gcVD+ZaY7U2q3WQW iROcDNmRauShM5fjCWXxZw8gkDBJMk0fqLKXCMY+jTv/HZ10ilRIL1CZ9d8xMQmf ahPD/udGer6JC54XzkyD8i55bwB0FZj4dzb6/Xe20WSnzzGHYTkjq5051wePVICz 9PTJggVl/CMfTKqutSPqEumz56nKhyLEhOPyhXNQPxOfkbFpu9p42Yr6/LkfAa+Y pRMaovYu7CwaLJNmho2e3DewVolSm/c/tQ3gah1HzLDdvY8k6OiWT0MtJ0SRuu8y reUaPymNdA/bPZc= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA20tEertsSF4ZzmPVQSc0 p55g0WtSSP11PmsSKT9DiUpppp1tsxWYLyF/3BQXTUdcAgBf1fKgDa5RjSQNXVNN mABLaS0xcpa/tdaU6vRe8ykPlmYAWSCaxlIR2GQSfDl8XVbB96eOrxItYHvd1rUY Pw9MJToBp0fLD/PKb2wKuxzvssXJ6uZ9RoFbeIRGs6voh8jEt6hvSlmyPwJ0R6pD us6Bn8MiBrotX4Q0Uactp6kCkLMI1l8dlYdidbkqjMiIK7PiQ5gK+2X1JelrJ9iL 078AlxxPRg8cMUaCmAl625pDqErWjG7vlKBPnKIiJCKUm91qmpf7kZY1KFR+4m5U T877bXJBNJi8FDjk2SRNHst0++WDwYQQmIwnTYxz39WMDp68yVklDpC3gJgAJbWB bbt+jK2oO9XYSdgem6AIjG3PXrUy7B3cNkZ6TjdoQTJFBsM5y8Egcv1aSE9EUULa 3zIGH5YCwXV10LAyBgXCsH87NJHrcfF0epJcx0g14tMOlypEQTN5JAYhPlQmXgl6 y5Tjm1Bghh9MkB2BrG8LYYnVeaha576D35opuIWtgT89Yw/LKF9UjtISJlXe2Xs0 pvthYG8+TkTTh9peRbog0dXy3gzTIiVZ1XW4vOi/+4rl6UO40mxhSeKcugRE9+Oz InIJm561FHlF4OVyRStkwWsCAwEAAQ== -----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 301733646098008231902573986729666379687440 . . . . . . . . [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 2019-02-20 02:35:58 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-05-21 02:35:58 +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 'yushikai.co.uk' . . . . . . . . [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 894641521992830365534985469825841375895700162582852201034123442795851315700280580041511273501925815785291756075697132578833206310656764630615818898399710454626772310518408770253474019532952896373105511864964209686498728111246187169649529717993776263308530999566876435995360328405392944551949604902797592996556763463383690723945998424741568645660577681872889371020034808288314666034078738329099194169732460200430496095320374039109399022070766201313923147459235533784945938284839560397935029776435851995225382475297757282903171446751179412845532193193755753624884493643576226508353943043095623548088762423776264606185378410316648424248554253478769935185536771872778712828656085980113768780407990037946503280141387390914870476006799236009473083720228770641004122528027912904244367861085844996855286976437289026093196300519987291539437353144097248517294163087674167732931792534818178677655537975967882167834357991527014566735784148747418001697609762642667878662398608771079971115678071559458667816919455993577326401431381733493413260731896718366387540810457393554962005404867434186945114086615358169677498216018615926555520638205371609315192921725125420286376659198559998364841227770821150699509012513098846601518163678309656177706058091 . . . . . . . . . . . . . . . . . . . . [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) 97ef561da4b1d4bafca16e822b61aa0f521842d4 . . . . . . . . . . . . . . . . [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 (38 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.yushikai.co.uk' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'yushikai.co.uk' . . . . . . . . . . . . . . . . [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) 00ef007500747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016908f9712800000403004630440220427121c254f029d857b76e196b55895e6317bd09a5bf4753cf7070c8801c5cef0220369bc772c2ddb4725ba8934d2e674071dde085bbb7bdbb7ec9cde99ae64bb0e4007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016908f971210000040300473045022100ee0921b5d9a5f2acdfa9b1526a5383f983eb1222ae815c31e0965c03cdf944d4022009e3f99de415e5e68c85acc2926a760ff189c427a070657b88c724bc572662b3 . . . . [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) 0025ce3292e9ff4e073d844f1ffef8fb68a4b94109596b4e743f4d50ece78744e0d351ec9bd611444e7f81c543f99698ed4daadd641689139c0cd9916ae4a13397e30965f1670f20903049324d1fa8b29708c63e8d3bff1d9d748a54482f5099f5df3131099f6a13c3fee7467abe890b9e17ce4c83f22e796f00741598f87736fafd77b6d164a7cf3187613923ab9d39d7078f5480b3f4f4c9820565fc231f4caaaeb523ea12e9b3e7a9ca8722c484e3f28573503f139f91b169bbda78d98afafcb91f01af98a5131aa2f62eec2c1a2c9366868d9edc37b05689529bf73fb50de06a1d47ccb0ddbd8f24e8e8964f432d274491baef32ade51a3f298d740fdb3d97