Term
RSA is a defacto used for |
|
Definition
1- Encryption
2- Digital signatures
3- Key exchange |
|
|
Term
What size is MD5 message digest (hash) |
|
Definition
|
|
Term
What does secure SHA-1 creates? |
|
Definition
1- Fixed length message
2- Digest from a variable length input message |
|
|
Term
what encryption do we use in PGP? |
|
Definition
|
|
Term
List IDEA's specifications |
|
Definition
1- Symmetric
2- 64 bit block
3- 8 rounds
4- 128 bit key
5- Block cipher
6- Used in PGP |
|
|
Term
Which is faster, IDEA or DES? |
|
Definition
|
|
Term
| List Blowfish's specifications |
|
Definition
1- Symmetric
2- Block cipher
3- 64 bit block
4- Key anywhere between 32 to 448
5- Goes through 16 rounds |
|
|
Term
Which layer of OSI model provides non repudiation?
|
|
Definition
|
|
Term
| IS DES symmetric or Asymmetric? |
|
Definition
|
|
Term
|
Definition
1- Encryption
2- Digital signature |
|
|
Term
Diffusion is carried out through... |
|
Definition
|
|
Term
Does RC4 provides hashing? |
|
Definition
|
|
Term
Which algorithm is vulnerable to man in the middle? |
|
Definition
|
|
Term
| What is the maximum key size for RC5 algorithm? |
|
Definition
|
|
Term
| What are the two types of Cryptography algorithms? |
|
Definition
|
|
Term
|
Definition
1- Created by Ron Rivest
2- Number of rounds up to 255
3- Symmetric
4- Block Cipher
5- Block size(s): 32,64 128
6- Keys goes up to 2048 bits |
|
|
Term
List the "One time Pad" specifications |
|
Definition
1- Made up of truly random values
2- Used only one time
3- Securly distributed to destination
4- secured at sender's and receive's site
5- At least as long as the message |
|
|
Term
|
Definition
when two keys generate the same cipher text from the same plain text |
|
|
Term
|
Definition
secret sequence of bits and instructions that governs the act of "Encryption" and "Decryption" |
|
|
Term
| Hint: The only secrecy is the key... |
|
Definition
|
|
Term
| The estimate of the effort and resources it would take an attacker to penetrate a cryptosystem? |
|
Definition
|
|
Term
| what is cryptosystem made up of? |
|
Definition
1- Software
2- protocols
3- Algorithms
4- Key |
|
|
Term
| what do we call the study of cryptography and cryptoanalysis? |
|
Definition
|
|
Term
| Rijndale replaced what algorithm? |
|
Definition
|
|
Term
| How many rounds does 3DES use? |
|
Definition
|
|
Term
| What is the mode that is used when encrypting individual characters are required? |
|
Definition
Cipher Feed back mode
CFB |
|
|
Term
| What DES, what mode do we use for ATM and PINS? |
|
Definition
ECB mode
Electronic Code Book mode |
|
|
Term
|
Definition
- Symmetric
- Block cipher algorithm
- 64 bit key
- 56 make up the true key
|
|
|
Term
| What do we call the practice of breaking cryptic systems? |
|
Definition
|
|
Term
what should we use for 1 secure communication? |
|
Definition
|
|
Term
| What algorithm uses Public and Private keys? |
|
Definition
Asymmetric
which some times is referred to by
Public Key Cryptography |
|
|
Term
| Confusion is carried out through |
|
Definition
|
|
Term
| What is Wasserar agreement? |
|
Definition
| Intangibles can be downloaded from the internet |
|
|
Term
| What cryptography algorithm provides "Authentication" and "non repudiation"? |
|
Definition
|
|
Term
What we call the DES mode that:
1- Functions like a stream
2- Cipher text is fed back to the algorithm to form a portion of the next input to encrypt the next stream of bit |
|
Definition
|
|
Term
| How do we calculate the number of symmetric keys needed ? |
|
Definition
|
|
Term
| Is IDEA symmetric or Asymmetric? |
|
Definition
|
|
Term
| What is the formula of key Space? |
|
Definition
|
|
Term
| What are the two types of Ciphers? |
|
Definition
| Substitution and Transportaion |
|
|
Term
| What algorithm did Rijndael replaced? |
|
Definition
|
|
Term
| In which DES mode does each block of text, the key and the value, are based on previous block processed and applied to the next block? |
|
Definition
CBC
Cipher Block Chaining |
|
|
Term
| Give an example about running key cipher? |
|
Definition
| Book number, page number, line number, etc.. |
|
|
Term
| Give an example about Concealment cipher? |
|
Definition
Message hidden within a message.
For example: Key- every 3rd word |
|
|
Term
|
Definition
| All possible values that can be sed to generate a key |
|
|
Term
| When does Frequency analysis take place? |
|
Definition
| when patterns in Ciphertext are identified and matched back to plain text. |
|
|
Term
| what are the downfalls of symmetric algorithm ? |
|
Definition
1- Key distribution
2- Scalability
3- Limited security |
|
|
Term
| Disadvantages of Asymmetric? |
|
Definition
1- Very slow
2- Size of encrypted limited by key length |
|
|
Term
| If I encrypt data with my private key, who can decrypt it? |
|
Definition
| any one who has my public key. |
|
|
Term
| If I encrypt data with your private key, who can decrypt it? |
|
Definition
| That shouldn't happen. Private key should be known by you only. |
|
|
Term
| If I encrypt data with my public key, who can decrypt it? |
|
Definition
| Only me, because I have the private key |
|
|
Term
| If I encrypt data with my private key, what service does that provide? |
|
Definition
|
|
Term
| why do we use asymmetric keys? |
|
Definition
| To encrypt symmetric keys |
|
|
Term
| What does Diffie-Hellman algorithm method allow? |
|
Definition
| It allows key agreement to happen in a secure manner. |
|
|
Term
| What algorithm replaces DES? |
|
Definition
|
|
Term
|
Definition
1- Block Cipher
2- Operates on 64 blocks data
3- Key length 128-bits
4- Uses 8 rounds of 16 bit sub blocks |
|
|
Term
|
Definition
|
|
Term
|
Definition
1- Variable key size up to 2040
2- Block Cipher
3- Variable Block size 32,64,128
4- Variable rounds up to 255 |
|
|
Term
| When does MAC take place? |
|
Definition
| When message and secret key are put together. |
|
|
Term
|
Definition
| Message Authentication Code. |
|
|
Term
| List the algorithms that can be used for Digital Signatures.. |
|
Definition
|
|
Term
|
Definition
| Digital Signature Standard (DSS) — uses secure hash algorithm (SHA-1) and condenses message to 160 bits — Key size 512 to 1024 |
|
|
Term
| If a symmetric key is encrypted with a receiver's public key, what security service is provided? |
|
Definition
|
|
Term
| What is the difference between symmetric key and session key? |
|
Definition
| Session key can be used ONE TIME only |
|
|
Term
|
Definition
It is symmetric block encryption algorithm.
It uses 64 bit key: 56 make up the true key, and eight bits are used for parity
DES goes through 16 rounds of transportation |
|
|
Term
| How many rounds does 3DES go through? |
|
Definition
48 rounds.
It is Triple DES, means 3xDES |
|
|
Term
| How many keys does 3DES have? What are they? |
|
Definition
It has three keys:
1- 128-goes through 10 rounds....192 bits-goes through 12 rounds.... and 256 bits-goes through 14 rounds |
|
|
Term
| What is Blow fish specs again? |
|
Definition
64 Bit Block symmetric algorithm
It goes through 16 rounds
key ranges between 32 up to 448 bits |
|
|
Term
| Which Symmetric algorithm uses Stream Cipher? |
|
Definition
|
|
Term
| A function that take a variable length and creates a fixed length value is called |
|
Definition
|
|
Term
| The HAVAL algorithm creates what function? |
|
Definition
|
|
Term
| The HAVAL algorithm, performs what function? |
|
Definition
|
|
Term
| What does One-Way hash provides? |
|
Definition
|
|
Term
| What does MD protect against? |
|
Definition
|
|
Term
|
Definition
| Confidentiality, Integrity, and Authenticity. |
|
|
Term
| What mail standard relied on Web trust? |
|
Definition
|
|
