How does a person under surveillance safely download tor or tails in a hostile environment?

One of tor’s stated goals is to help individuals such as journalists, activists and whistleblowers protect against surveillance, and in many countries people in those lines of work or activities are usually subject to surveillance, especia… Continue reading How does a person under surveillance safely download tor or tails in a hostile environment?

Validate server certificate’s chain of trust in ajax call [closed]

I’m using ajax to serve some static html pages as modal boxes, I got a report from veracode saying that I should validate the server’s ssl certificate and the chain of trust in the ajax call to ensure there is no man in the middle attacks … Continue reading Validate server certificate’s chain of trust in ajax call [closed]

Man-in-the-Middle Attack Makes PINs Useless for VISA Cards

EMV protocol is vulnerable to a man-in-the-middle attack All VISA credit cards are affected VISA has to issue update for POS terminals Swiss security researchers have discovered a way to bypass the PIN authentication for Visa contactless transactions. … Continue reading Man-in-the-Middle Attack Makes PINs Useless for VISA Cards

Priate key vs encryption session keys: For what is the private key used when there are session keys for encryption? [duplicate]

I have read that the private key that the certificate owner/web server has (which is the corresponding private key of the public key presented on the certificate) is used to decrypt the data that the client sends to the server.
My question… Continue reading Priate key vs encryption session keys: For what is the private key used when there are session keys for encryption? [duplicate]