Introduction to Cryptography - D334 Shawn C839v5/D334 All-In-One Stud
Guide
Study online at https://quizlet.com/_ecw9un
1 Changing plaintext into ciphertext Encry
. (Should be applied in at rest and in ption
transit)
2 Decry
. Changing ciphertext to plaintext ption
3. Encrypt individual files and full disks with options such Aescrypt
as BitLocker and FileVault
4. Mapping from our alphabet to a number and
of cipher alphabets. aperiodic.
Added complexity in early cryptosystems.
5. Single mapping from our alphabet to a
cipher alpha- bet is created.
Many early cryptosystems.
6. Considered un-breakable since it only uses its
cipher code once.
7. Method repeats the random numbers after a
given time. (periodic)
They are fast and deterministic.
Useful in producing repeatable set of random
num- bers.
8. Method generates a true random number
and uses some form of random process. One
approach is to monitor the movements of a
mouse pointer on a screen or from the pauses
between keystrokes. Over- all, the method is
generally slow, especially if it in- volves
human interaction, but is non-deterministic
1/
33
,Polyalphabetic
Mono-Alphabetic
One-Time Pad
Pseudo-Random Number Generators (PRNGs)
True Random Number Generators (TRNGs)
2/
33
, Introduction to Cryptography - D334 Shawn C839v5/D334 All-In-
One Stud Guide
Study online at https://quizlet.com/_ecw9un
9. Cipher cracking methodology that involves identifying Frequency
Analysis
patterns and variations in the probability of codes.
i.e. a three-letter ciphered text combination
spotted at the beginning of a string too often
could tip us off that those three letters correlate
the letters THE in the English alphabet.
10. measures level of unpredictability Entropy
11. Two common binary to characters encoding methods ASCII (8bit value,
up to
256 characters)
UTF-16 (16bit values,
up to 65,536
characters)
12. 8 bit value, up to 256 characters ASCII
13. 16 bit value, up to 65,536 characters UTF-16
14. Tamper-evident and intrusion-resistant physical de- Hardware Security
Mod-
vice that safeguards and manages cryptographic keys ule (HSM)
and provides cryptographic processing.
15. Which encryption is more efficient? Hardware
16. Dedicated processor that handles hardware- Contains
level en- cryption; allows the use of full disk the
encryption on a hard drive in a manner that encryption
keys.
minimizes the impact on system
performance.
3/
33
, Trusted platform module (TPM)
17. value which only has factors of 1 and itself Prime Number
4/
33
Guide
Study online at https://quizlet.com/_ecw9un
1 Changing plaintext into ciphertext Encry
. (Should be applied in at rest and in ption
transit)
2 Decry
. Changing ciphertext to plaintext ption
3. Encrypt individual files and full disks with options such Aescrypt
as BitLocker and FileVault
4. Mapping from our alphabet to a number and
of cipher alphabets. aperiodic.
Added complexity in early cryptosystems.
5. Single mapping from our alphabet to a
cipher alpha- bet is created.
Many early cryptosystems.
6. Considered un-breakable since it only uses its
cipher code once.
7. Method repeats the random numbers after a
given time. (periodic)
They are fast and deterministic.
Useful in producing repeatable set of random
num- bers.
8. Method generates a true random number
and uses some form of random process. One
approach is to monitor the movements of a
mouse pointer on a screen or from the pauses
between keystrokes. Over- all, the method is
generally slow, especially if it in- volves
human interaction, but is non-deterministic
1/
33
,Polyalphabetic
Mono-Alphabetic
One-Time Pad
Pseudo-Random Number Generators (PRNGs)
True Random Number Generators (TRNGs)
2/
33
, Introduction to Cryptography - D334 Shawn C839v5/D334 All-In-
One Stud Guide
Study online at https://quizlet.com/_ecw9un
9. Cipher cracking methodology that involves identifying Frequency
Analysis
patterns and variations in the probability of codes.
i.e. a three-letter ciphered text combination
spotted at the beginning of a string too often
could tip us off that those three letters correlate
the letters THE in the English alphabet.
10. measures level of unpredictability Entropy
11. Two common binary to characters encoding methods ASCII (8bit value,
up to
256 characters)
UTF-16 (16bit values,
up to 65,536
characters)
12. 8 bit value, up to 256 characters ASCII
13. 16 bit value, up to 65,536 characters UTF-16
14. Tamper-evident and intrusion-resistant physical de- Hardware Security
Mod-
vice that safeguards and manages cryptographic keys ule (HSM)
and provides cryptographic processing.
15. Which encryption is more efficient? Hardware
16. Dedicated processor that handles hardware- Contains
level en- cryption; allows the use of full disk the
encryption on a hard drive in a manner that encryption
keys.
minimizes the impact on system
performance.
3/
33
, Trusted platform module (TPM)
17. value which only has factors of 1 and itself Prime Number
4/
33
