Cryptext definition password#
Cryptext definition series#

I know DH is susceptible to MITM attacks and that's why certificates are used for authentication, but if a stolen certificate could authenticate the fake server, could a SSL/TLS connection with DH happen to a fake server using a stolen certificate? Could a SSL/TLS connection not then be created with the attackers server and the stolen certificate would authenticate the server (if the DNS names matched). If DH is used instead of RSA, is the public key ever on a certificate, or are both the public and private keys created when the connection is made and temporary. When I look at a certificate and see a public key, is this always the RSA public key? And is it only used if RSA is the method for generating the secret symmetrical key? My question is, how is the private key used in the handshake (not looking for too much depth).Īm I right in thinking either RSA or Diffie-Hellman can be used to create a shared symmetrical secret key in SSL/TLS, depending on how it is implemented? I understand why a private key is needed with RSA, a random number is encrypted by the client with the servers public key and sent to the server and decrypted with the private key. The answer to the question I linked above explained the reason the connection would show as untrusted is the private key is needed on the server to complete the SSL/TLS handshake. The identity part is the authentication and am I right in thinking this would pass with a stolen certificate if the DNS name was correct? The signature would still be valid I believe as it hasn't been modified therefore will hash to the same value and has been signed by a trusted agent. On Chrome, if you click the padlock > connection, there are two parts, identity and connection. Would the 'identity'/authentication part possibly show as trusted (even though overall the 'padlock' would still show as untrusted?) Before the SSL/TLS handshake, the diagrams I've looked at show that the protocol authenticates the server first. I now know the website in the browser wouldn't appear as trusted, but I have a couple of follow up questions: Narrated by Jeff Fischer.Yesterday I asked the following question regarding what would happen if you placed a stolen certificate on your own server and edited the 'host' file so that the DNS name matched:Ĭould a stolen certificate show as trusted? Da Vinci Declassified, 2006 TLC video documentary, written, directed and produced by David Carr, David Comtois, and Frankie Glass.In episode 88 of the South Korean variety show Running Man, the cast members had to find clues attached to other staff members to open their cryptex.The cryptex is not solved, but smashed with a hammer to reveal its message.

Cryptext definition series#

In the Season 4 episode 'Operation Ann' of the TV series Parks and Recreation, a cryptex is given as the first clue to an elaborate scavenger hunt.In Season 3 of the TV series Eureka, in the episode 'Show Me the Mummy,' a nearly-unbreakable cryptex is the key to a hidden underground bunker.On the NBC reality series Treasure Hunters, cryptexes were among the puzzles that challenged contestants.

Cryptext definition password#

In the inner compartment of the cryptex, secret information can be hidden, written on a scroll of thin papyrus wrapped around a fragile vial of vinegar as a security measure: if one does not know the password but tries to force the cryptex open, the vial will break and the vinegar will dissolve the papyrus before it can be read. The cryptex works 'much like a bicycle's combination lock', and if one arranges the disks to spell out the correct password, 'the tumblers inside align, and the entire cylinder slides apart' (p. 200). Each of the disks is carved with the entire alphabet and, since they can be rotated individually, the disks can be aligned to spell different five-letter words. The (first) cryptex featured in the novel is described as a stone cylinder comprising 'six doughnut-sized disks of marble had been stacked and affixed to one another within a delicate brass framework' end caps make it impossible to see inside the hollow cylinder.