Marwan crossword

123456
Across
  1. 2. a symmetric encryption algorithm (block cipher) using 56-bit keys
  2. 4. attack which consists of testing all the words in a list as a keyword
  3. 5. attack which consists of testing all possible password or key solutions.
  4. 6. a public-key cryptosystem, one of the oldest widely used for secure data transmission.
Down
  1. 1. The principle holds that a cryptosystem should be secure, even if everything about the system, except the key, is public knowledge.
  2. 3. is used to transmit data securely and anonymously over public networks.