Cryptography and words for work

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Across
  1. 2. the study and practice of hiding information so that only those for whom it is intended can read and process it
  2. 6. the degree of difference between the light and dark parts of a picture on a TV, photograp.
  3. 10. to add the most recent information or the latest improvement to something.
  4. 11. computer software which asks a series of questions to try to find the cause of a problem, and suggest possible solutions.
  5. 12. the information cannot be understood by people whom it was not intended
  6. 13. letters, numbers and symbols that have the same size and style.
  7. 14. the information cannot be altered in storage or in transit between the sender and the intended receiver without the alteration being detected.
Down
  1. 1. an ordinary text
  2. 3. the level of detail reproduced by a computer screen or TV.
  3. 4. a system that uses a pair of related keys
  4. 5. is the process of transforming information using an algorithm or cipher to make it unreadable to anyone except those possessing special knowledge
  5. 7. a small computer program that is added to software to solve problems
  6. 8. Illustrations available on websites which people can copy and use in their documents.
  7. 9. A small container, usually holding liquid or powder, that can be loaded into a device