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CISSP Crypto Domain
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CISSP Crypto Domain
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25 Questions

1. A specific proceedure

2. One key - only confidentiality

3. Keys needed to decrypt cyphertext so an authorized third party can gain access

4. Numeric seeding value used to with a symmetric key to provide randomness

5. Instance when two keys keys generate the same ciphertext from same plaintext

6. RC(x) - 32 - 64 - 128 bit blocks - key max at 2048 bits

7. Advanced Encryption Standard - replaced DES - Rijndael based - 128 - 192 - and 256 bit keys/blocks with 10 - 12 - 14 rounds resp.

8. Secret sequence of bits and instructions used to encrypt/decrypt

9. Function that takes a variable length string; and compresses and transforms it into a fixed length- output called a hash or message digest

10. 128 bit encryption; on 16 rounds of encryption; key size of 64 bits 8 parity; 56 bits long

11. Buries a message by taking the least significant bit of evvery byte to carry the message; hide a message in another message. Graphics; sound files; alternated used in corporate espionage

12. Data Encryption Standard - 64 bit blocks - 56 bit key - 16 rounds - 4 modes

13. Each pair of entities must receive in secure fashion; requires more overhead than worth; key distro challenging- sender recievermust be on the same sheet

14. Certificate Authority; registration authority offloads work; validates identity; distributes key; certificate server maintains repository that stores certificates

15. Different keys for encryption and decryption; two keys private and public Encrypt with private- unencrypt with privateor encrypt with public- decrypt with private. Use of private ensures non repudiation; without confidentiality-becomes the digital si

16. Provided by mixing up the location of plaintext throughout the cipher

17. Message Authentication codes; aka message integrity code; modification detection code; cryptographic checksum; generated by running message through secret key(DES CBC) MAC is the last block generated by algorithm 64 bit

18. Encryption - decryption - signing - verifying

19. Block based - adds padding - same key - same clear = same ciphertext

20. No plaintext exposure; encrypted at source; VPN; SSL ;SSH

21. First public key exchange system - users exchange keys over insecure medium.

22. Stream based - errors do not propagate across blocks

23. Public Key Infrastructure- Developed to provide standards for key generation; authentication; x.509 non used with Pretty Good Privacy; good private good "web of trust"

24. NIST 1991 - outlines authorized algorithms

25. Binary operation that adds bits together; plaintext is XORed with a random keystream to generate cyphertext

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