Announces a list of X.509 certificate hashes that are allowed to appear in the website's TLS certification path (HTTP Public Key Pinning or HPKP). This prevents malicious proxy servers from transparently replacing the public certificates with their own and wiretapping the TLS connection of the unsuspecting user. This header sets HPKP in enforcement mode.

Reference...

We have seen 351 websites setting the Public-Key-Pins HTTP header and 310 unique values of this header.

  • ipsec.pl max-age=5184000; pin-sha256="4ac/dgQzG+hrDPBJEsb6ymYhB/74Lln5XAxAKCSxkE0="; includeSubDomains
  • tjhsst.edu pin-sha256="Rl0fJIccrEu9Yb10xxXzr8ffR2FwC8CY4ggbOF2SnNA="; pin-sha256="B8GKK/RgTKYZKRLTH+70QSDJe3mvDA4cHD3CSvMywfo="; max-age=15768000
  • cspbuilder.info pin-sha256="YKCfkXPOyNOIWDfr0KPXc0yDsf3KQ8iGzt/xA1PVkFk="
  • privacyinternational.org pin-sha256="RRM1dGqnDFsCJXBTHky16vi1obOlCgFFn/yOhI/y+ho="; pin-sha256="WoiWRyIOVNa9ihaBciRSC7XHjliYS9VwUGOIud4PB18="; pin-sha256="lT09gPUeQfbYrlxRtpsHrjDblj9Rpz+u7ajfCrg4qDM="; pin-sha256="h6801m+z8v3zbgkRHpq6L29Esgfzhj89C1SyUCOQmqU=";pin-sha256="DuDQSSa4ubaTzab5MBjh2NvrEkDzt10kPEdnDQUPnZ0=";pin-sha256="lCppFqbkrlJ3EcVFAkeip0+44VaoJUymbnOaEUk7tEU=";pin-sha256="ORuXcQB//xhdb52by/Vmo/qhrTuazztSjlMMhaafJZ0=";pin-sha256="x9SZw6TwIqfmvrLZ/kz1o0Ossjmn728BnBKpUFqGNVM=";pin-sha256="58qRu/uxh4gFezqAcERupSkRYBlBAvfcw7mEjGPLnNU=";pin-sha256="YH3gQW7+dkqR106QZabQ1Aj+6wtLuy70aAZpWreNcBc="; max-age=1209600; report-uri="http://report.globalcause.net/privacyint/live";
  • advego.ru pin-sha256="ud5NhjsbOWu1YVeYAkVuRUBEBT29qSdjKQeJk0UJCWU="; max-age=2592000;
  • coinbase.com max-age=5184000; pin-sha256="r/mIkG3eEpVdm+u/ko/cwxzOMo1bk4TyHIlByibiA5E="; pin-sha256="WoiWRyIOVNa9ihaBciRSC7XHjliYS9VwUGOIud4PB18="; pin-sha256="JbQbUG5JMJUoI6brnx0x3vZF6jilxsapbXGVfjhN8Fg="
  • jigsaw.w3.org pin-sha256="cN0QSpPIkuwpT6iP2YjEo1bEwGpH/yiUn6yhdy+HNto="; pin-sha256="WGJkyYjx1QMdMe0UqlyOKXtydPDVrk7sl2fV+nNm1r4="; pin-sha256="LrKdTxZLRTvyHM4/atX2nquX9BeHRZMCxg3cf4rhc2I="; max-age=864000
  • cdnjs.com pin-sha256="EULHwYvGhknyznoBvyvgbidiBH3JX3eFHHlIO3YK8Ek=";pin-sha256="x9SZw6TwIqfmvrLZ/kz1o0Ossjmn728BnBKpUFqGNVM=";max-age=3456000;report-uri="https://cdnjs.report-uri.io/r/default/hpkp/enforce
  • htbridge.com pin-sha256="nfWqOpn8HzrxEMZRb9XDqMd3F66f4zUZV9OIxV54rzI="; pin-sha256="336Y0ki9qK9LlE36Ma4qATSQF5zEc34XZ3UYZfZ5BMw="; max-age=15768000; includeSubDomains
  • freenetproject.org pin-sha256="HchJWFlL8Gfi1WYQK50EiI1OH/uZWI5JyDbh8Bu0V/c="; pin-sha256="LGLDJVhcm+qVgb6gUbcmW/AMgtfBEUFlf48ZZrYfBCo="; pin-sha256="OfWvASGkJSpmS9PE/Y6F6vQJ41FIO71MoCxTjvIENrs="; max-age=864000; includeSubDomains; report-uri="http://report.freenetproject.org/pkp-report.php"
  • widememory.com pin-sha256=c784333d20bcd742b9fdc3236f4e509b8937070e73067e254dd3bf9c45bf4dde; max-age=604800; includeSubDomains
  • billogram.com pin-sha256="+qVQvnt5yb253ksCTDShLi4YF0vAPSNklg/lZZBVP/8="; pin-sha256="wdVM/85nxkG2Y1/J/qYfsIuCEsj8jzERJ3Aw7yAeDSw="; pin-sha256="KXTSUWRog1JWXRETuXpaNxwBb70GhK2DPbxT48pqGM0="; pin-sha256="cbRybe3tXRUTuqwtSimQpF9niYVqDxVCgzCBOyGLJgo="; pin-sha256="lPY3Z7kFEInh8+8Qgsinuj2eME1bQOVNnVc13s3TYI0="; pin-sha256="b8WqC0bsigc3akPYzfSUBKnI0qRfz3G4EWFwhS8305k="; pin-sha256="UPYaBL6pD2gw8CIQPLZh16/DG+16iIrph3ZUy6fKx7w="; pin-sha256="IOBCdzKsvdCTAb/L7+3VIMtG/doHybMnJL4HFShbzsM="; max-age=2592000
  • informnapalm.org pin-sha256="KjvuwtRryHijYiNZG7xo1YzJBV1XcWPSapeuGGUon1s="; pin-sha256="D9G12IslSSGNiL8utXh3nvc8srHwUz7EwSY6sBwze/k="; max-age=15768000; includeSubDomains
  • github.com max-age=5184000; pin-sha256="WoiWRyIOVNa9ihaBciRSC7XHjliYS9VwUGOIud4PB18="; pin-sha256="RRM1dGqnDFsCJXBTHky16vi1obOlCgFFn/yOhI/y+ho="; pin-sha256="k2v657xBsOVe1PQRwOsHsw3bsGT2VzIqz5K+59sNQws="; pin-sha256="K87oWBWM9UZfyddvDfoxL+8lpNyoUB2ptGtn0fv6G2Q="; pin-sha256="IQBnNBEiFuhj+8x6X8XLgh01V9Ic5/V3IRQLNFFc7v4="; pin-sha256="iie1VXtL7HzAMF+/PVPR9xzT80kQxdZeJ+zduCB3uj0="; pin-sha256="LvRiGEjRqfzurezaWuj8Wie2gyHMrW5Q06LspMnox7A="; includeSubDomains
  • ovpn.to pin-sha256="qLOjRk/vnWjkwsIMHURVSGmDBSMzZVO+Jg2ZhzxuBJE="; pin-sha256="YyxKv/a6MD8/4qKcv7U02+OsEz34bhqj6DfTBIXcI8w="; max-age=15552000
  • fresh.co.il pin-sha256="msP9V3W/2cTy5cE7tabVs3/7f7FdcNg6PYlv/XXHtqA="; pin-sha256="45YHa1ptkytrxQsQqiOUYx21lYIPBfC9K8r/TJte+SA="; pin-sha256="QWRQgm35VWtEvoiyOglOaCQ/iizKeTFbKrbwhXlp/1s="; pin-sha256="iE7GA3DiKs1Y5jkRmi+TcnvTGQAIjCoPC5H4Zb2tl4c="; pin-sha256="FblLW1imWuLxayYTy1AZqSGdYTQFWO4KTUVPbAtyE1U="; pin-sha256="tKjZ7/v6IVMIW+8Q/XO32kcKkFLCVqfOT4kwOk/qESw="; max-age=2592000; includeSubDomains; report-uri="https://fresh.report-uri.io/r/default/hpkp/enforce"
  • firedupgroup.co.uk pin-sha256="klO23nT2ehFDXCfx3eHTDRESMz3asj1muO+4aIdjiuY="; pin-sha256="AlqUuq4QRw5a3xhT97IR7rV0lK5Bu7M3K5xfPVNIrrI="; pin-sha256="f2RCeUSSjZo+9RCAoZmAKTr7fUiFLnUX11x+CZ2j6q0="; pin-sha256="YLh1dUR9y6Kja30RrAn7JKnbQG/uEtLMkBgFF2Fuihg="; max-age=0;
  • officedepot.hu max-age=31556952; pin-sha256="2zbWxQ6/oMwA2Oi2fJI3SpkRiSE1htwDMgXrZlIOJWg="; pin-sha256="iLB3vDTwvv+j81sIPpQuLLqCOvj4SqM4ywTNotzgplY="
  • shina.ru pin-sha256="HBV4roQKq8eO0wdDP1ejvXdqzRry1FAqMYy4liGjaAM="; max-age=5184000;
  • studenteninternet.be pin-sha256="klO23nT2ehFDXCfx3eHTDRESMz3asj1muO+4aIdjiuY="; pin-sha256="633lt352PKRXbOwf4xSEa1M517scpD3l5f79xMD9r9Q="; max-age=2592000; includeSubDomains
  • threema.ch pin-sha256="8SLubAXo6MrrGziVya6HjCS/Cuc7eqtzw1v6AfIW57c="; pin-sha256="8kTK9HP1KHIP0sn6T2AFH3Bq+qq3wn2i/OJSMjewpFw="; max-age=5184000; report-uri="https://3ma.ch/pinreport"
  • decoded.co pin-sha256='lJ+K42lxEOYHQ9EalyTx9iwNDZq+HJNGraghCVi4e3E='; pin-sha256='uNH9tRQtNRvpYAhsaA450d8xjUkBBmPgSJxrJWYJvLU='; pin-sha256='HEk3/bqt2jj9iCWqplgtyM7Fsqz77lo80vNhbpOglk4='
  • securityheaders.com pin-sha256="t/OMbKSZLWdYUDmhOyUzS+ptUbrdVgb6Tv2R+EMLxJM="; pin-sha256="PvQGL6PvKOp6Nk3Y9B7npcpeL40twdPwZ4kA2IiixqA="; pin-sha256="ZyZ2XrPkTuoiLk/BR5FseiIV/diN3eWnSewbAIUMcn8="; pin-sha256="0kDINA/6eVxlkns5z2zWv2/vHhxGne/W0Sau/ypt3HY="; pin-sha256="ktYQT9vxVN4834AQmuFcGlSysT1ZJAxg+8N1NkNG/N8="; pin-sha256="rwsQi0+82AErp+MzGE7UliKxbmJ54lR/oPheQFZURy8="; max-age=600; report-uri="https://report-uri.io/report/ScottHelme"
  • posteo.de pin-sha256="fN88JfnaJETU3r1IBBELkRBvZI27UHb5fjqFdqntyGo="; pin-sha256="cDZJWRCnbfSbwWjSKoFUeIO+2q2mpgt8qovVIyyI8/I="; pin-sha256="YHg6lF6c81F7j83apmWtrzgANaHRN1gjRXGqMNGm5C0="; pin-sha256="n7PGfQw+GvUXtmEEEly4Uz0EhXpmWRh25lxDSmTdjAU="; pin-sha256="sfmSmDBmXyNx2UzwERrXQwON4WRfyPqvMMSkB8GL7UI="; pin-sha256="DMWN7Y2jmVhlgbHt84oHcjNOtd+teEsIktgmgfG/x9U="; pin-sha256="8qTkmsa3Rwl9ePKb3bO2gaU+cMRlexm1rbVcSgD87HE="; pin-sha256="i1PRtFyJzY/GkcV+FU5HjtGpTEm4bXVBni9ZPiqwg5k="; pin-sha256="Bc5nYUmZLuv/vmIQyPTkMfvzeNdni4/8+NQVm9IgwRU="; pin-sha256="pGSUcCKy0Gd2w4B5AXQf7HHtYRkFfTDevc+QVP6H9Z8="; pin-sha256="uTYoGk3b0PPZDmEwMuDgrp3/bCp1NRqAV+Zk9xa70sk="; max-age=2592000
  • psb4ukr.org pin-sha256="YNlv8uD4wQgJXGVEKa2RM0ItL2HRpGH+hWj3d45rVfk="; pin-sha256="pNFoaDvUW2YZ3wk540oPKyZy5JLjbyt+EO6lOhp2C5M="; max-age=15768000
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