17 Security

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Across
  1. 1. Digital ........ – an electronic document used to prove the identity of a website or individual.
  2. 5. When opening a TLS session, it requires considerable computer time (due mainly to complex cryptographic processes taking place). The use of session ........ can avoid the need to utilise as much computer time for each connection.
  3. 7. This type of encryption uses a secret key; the same key is used to encrypt and decrypt the encoded message.
Down
  1. 2. It is the need to identify who sent the data and verify that the source is legitimate.
  2. 3. This type of cryptography utilises the physics of photons (light energy according to the formula E = hf)
  3. 4. Another name for a hacker
  4. 6. a fixed-size numeric representation of the contents of a message produced from a hashing algorithm.