Cryptographic hash functions are utilized in order to keep data secured by providing three fundamental safety characteristics:
pre-image resistance, second pre-image resistance, and collision resistance
.
What are the characteristics that are needed in secure hash function explain?
1)
There should be a fixed length output generated by the hash function
. 2) there should be easiness for finding the hash function for a certain or given message. 3)There should not be same hash value for the two different messages. This is because it goes against the property of hash function.
What is a characteristic of the TPM?
What is a characteristic of the Trusted Platform Module (TPM)?
it provides cryptographic services in hardware instead of software
** it allows the user to boot a corrupted disk and repair it. it is available only on Windows computers running Bitlocker.
What characteristics are needed in secure hash function write about the security of hash functions and Macs?
- Non-reversibility, or one-way function. A good hash should make it very hard to reconstruct the original password from the output or hash.
- Diffusion, or avalanche effect. …
- Determinism. …
- Collision resistance. …
- Non-predictable.
Which of these is the most secure symmetric cryptographic algorithm standard?
AES
. The most commonly used symmetric algorithm is the Advanced Encryption Standard (AES), which was originally known as Rijndael. This is the standard set by the U.S. National Institute of Standards and Technology in 2001 for the encryption of electronic data announced in U.S. FIPS PUB 197.
Which hash functions are secure?
The Secure Hash Standard specifies five secure hash algorithms,
SHA-1, SHA-224, SHA-256, SHA-384, and SHA-512
. All five of the algorithms are iterative, one-way hash functions that can process a message to produce a condensed representation called a message digest.
Why is SHA used?
SHA is the acronym for Secure Hash Algorithm,
used for hashing data and certificate files
. Every piece of data produces a unique hash that is thoroughly non-duplicable by any other piece of data. … SHA is the cryptographic algorithm adopted by the PKI market for digital signatures.
What is the function of TPM?
TPM (Trusted Platform Module) is a computer chip (microcontroller)
that can securely store artifacts used to authenticate the platform (your PC or laptop)
. TPM (Trusted Platform Module) is a computer chip (microcontroller) that can securely store artifacts used to authenticate the platform (your PC or laptop).
What is the primary purpose of the TPM?
The TPM is a cryptographic module that
enhances computer security and privacy
. Protecting data through encryption and decryption, protecting authentication credentials, and proving which software is running on a system are basic functionalities associated with computer security.
What does TPM protect against?
TPM chips use a mix of software and hardware to protect
any important passwords or encryption keys
when they are sent in this unencrypted form. If a TPM chip senses that a system’s integrity has been compromised by a virus or malware, it can start up in a quarantine mode to help fix the problem.
Where do you use hash functions?
Hash functions are used
in conjunction with hash tables to store and retrieve data items or data records
. The hash function translates the key associated with each datum or record into a hash code, which is used to index the hash table.
What are the different types of hash functions?
- Division Method: It is the most simple method of hashing an integer x. This method divides x by M and then uses the remainder obtained. …
- Multiplication Method: This method has following steps: …
- Mid-Square Method: …
- Folding Method: The folding method works in the following two steps:
What is hash function example?
A few examples of common hashing algorithms include:
Secure Hash Algorithm (SHA)
— This family of hashes contains SHA-1, SHA-2 (a family within a family that includes SHA-224, SHA-256, SHA-384, and SHA-512), and SHA-3 (SHA3-224, SHA3-256, SHA3-384, and SHA3-512).
What are the 3 main types of cryptographic algorithms?
- Hash functions.
- Symmetric-key algorithms.
- Asymmetric-key algorithms.
- Hash Functions.
- Symmetric-Key Algorithms for Encryption and Decryption.
Which of these is the strongest cryptographic algorithm?
- TripleDES.
- Twofish encryption algorithm.
- Blowfish encryption algorithm.
- Advanced Encryption Standard (AES)
- IDEA encryption algorithm.
- MD5 encryption algorithm.
- HMAC encryption algorithm.
- RSA security.
Why is RSA better than AES?
Because there is no known method of calculating the prime factors of such large numbers, only the creator of the public key can also generate the private key required for decryption.
RSA is more computationally intensive than AES
, and much slower. It’s normally used to encrypt only small amounts of data.
