Abstract: Public Key Infrastructures (PKI), as a part of Grid Security Infrastructures (GSI), offers authentication service for Grid entities. In CA inter-operation, aiming at the shortcoming of the ...

Webサーバーで使うサーバー証明書の発行数が世界最多の認証局（CA：Certificate Authority）であるLet's Encryptが、衝撃的な声明を発表した（図1）。サーバー証明書の有効性を確認するメジャーなプロトコルである「OCSP（Online Certificate Status Protocol）」のサポートを ...

What happens when a hacker gets an SSL certificate’s private key? The CA revokes it. But how does the browser know whether a website’s certificate has been revoked? OCSP is one way your web client can ...

Many methods exist for publishing and querying these lists but few of them are widely used. This is largely because the methods are slow, prone to failure or are just plain complicated to understand ...

The Online Certificate Status Protocol (OCSP) lets web browsers and clients check the status of an issued TLS certificate with a Certificate Authority (CA), ensuring that the certificate has not been ...

The OCSP protocol works by sending a request to the CA's OCSP responder, which then responds with the current status of the certificate. The response can be one of three possible states: "good" (the ...

OpenSSL patched a high-severity vulnerability in its deployment on the Online Certificate Status Protocol, and also mitigated the SWEET32 attack. A vulnerability in the OpenSSL implementation of the ...