Across
- 3. A key known only to one user/computer
- 5. Encryption that uses public and private keys to secure data
- 8. A computer capable of very fast calculations using probability, allowing it to process much more data than traditional computers
- 10. A type of serial data transmission which has become the industry standard for connecting computers to devices via a USB port
- 15. Sending data down one channel/wire one bit at a time
- 17. A method of transmission in which a message is broken into many data packets which can then be sent along pathways independently of each other
- 18. The part of a data packet that indicates the end of the data packet and cyclic redundancy check error check
- 21. A verification method used to check if data transferred has been altered or corrupted; calculated from the data block and sent after each block
- 22. Data that arrives at the destination with the bits no longer synchronised
- 23. Stages in a network that can receive and transmit data packets; routers are nodes in communication networks
- 25. A bit (either 0 or 1) added to a byte of data in the most significant bit position; ensures correct parity protocol
- 27. The actual data being carried in a data packet
- 28. The process of making data meaningless using encryption keys
- 29. Data that can be sent in both directions at the same time (simultaneously)
- 31. Encrypted data produced from plaintext using an encryption algorithm
- 33. A horizontal and vertical parity check on a block of data being transmitted
- 34. A method used to check if data has been transferred correctly; it makes use of even parity or odd parity
- 35. The original text/message before encryption
Down
- 1. A key used in symmetric encryption that both parties have access to
- 2. Encryption where the same key is used to encrypt and decrypt a message
- 4. A message sent to the sender indicating that data has been received correctly
- 6. Another name for a hacker who intercepts data being transmitted on a network
- 7. A key known to all users
- 9. An extra byte of data sent at the end of a parity block; composed of parity bits from a vertical parity check
- 11. The time interval allowed to elapse before an acknowledgement is received
- 12. Data that can be sent in one direction only
- 13. A small part of a message/data that is transmitted over a network; after transmission all the data packets are reassembled to form the original message/data
- 14. A device that enables data packets to be moved between different networks, for example to join a LAN to a WAN
- 16. A method where data is sent to a receiver and immediately sent back to verify accuracy
- 19. An additional digit appended to a number to check if the entered number is error-free
- 20. A method of checking transmitted data for errors using acknowledgement and timeout to request re-sending
- 24. Data that can be sent in both directions but not at the same time
- 26. The part of the data packet that contains the IP addresses of the sender and receiver, and includes the packet number which allows reassembly of the data packets
- 30. Software that converts plaintext into ciphertext
- 32. Sending data down several channels/wires several bits at a time (usually 1 byte)