The signature is created by calculating the hash of all data contained in the certificate. And above all, certificate contains the signature of the certification authority.Public key of the server with which we want to communicate (this key will be used for transfer of keys for symmetric encryption).Who issued it – name of the certification authority (CA), which issued the certificate.In terms of communication, the entry Common Name (CN) is of particular interest, it specifies the domain for which the certificate was issued or sub domains (wildcard certificate) for which the certificate is valid (e.g. Data contained in the SSL certificate are used for this, and the certificate includes primarily information on: For this reason it’s necessary to verify the identity of the server (domain). In such case the communication would be secure however the data would be encrypted with the attacker’s keys and he would therefore gain access to their decrypted version. The server sends the certificate to the TV during the handshake sequence.Įncryption alone is not enough, the TV must also verify the identity of the server and prevent the scenario in which an attacker (called man-in-the-middle) tricks the TV with his own SSL certificate and all communication would be transferred through him. For secure transfer of keys is utilized asymmetrical encryption, for which the TV uses public key of the server containing the server’s SSL certificate. The key is also exchanged between the TV and the server during the handshake sequence. Because the data itself is always encrypted symmetrically (AES, 3DES, RC4, Camelia…) it’s necessary that both sides share the key for the given algorithm. For this reason a so-called SSL handshake occurs before the transfer itself, during which it is established by both sides which ciphers will be used for encryption, which for the transfer of keys, which hash algorithm should be used for the integrity checks, and so on. There is a wide range of encryption algorithms and it’s necessary to agree on the type of cipher before the encrypted communication can be established. The type of encryption depends on capabilities and sets of supported ciphers (called cipher suite) on both sides – i.e. Secure transfer over the Internet utilizes symmetrical encryption of data. This causes certain problems for applications on smart TVs.
#Samba interactive tv ssl error philips tv verification
Secure communication on the Internet requires an encryption of transferred content and a verification of identity of the server, with which the TV communicates.
0 kommentar(er)
