Bitcoin
$ 61,636
Ethereum
$ 2,197.2
Tether
$ 0.9990

Cryptographic Hash Function

A cryptographic hash function is a mathematical algorithm that takes an input (or “message”) and returns a fixed-size string of bytes, typically a digest that is unique to each unique input. It is designed to be a one-way function, meaning that once data has been turned into a hash, it cannot be converted back to its original form.

Key Features:

  1. Deterministic: For a given input, the output (hash) will always be the same.
  2. Fast to Compute: For any given data, it should be quick to compute the hash value.
  3. Irreversible: It’s computationally infeasible to regenerate the original input value given the hash output.
  4. Collision-Resistant: Two different inputs should not produce the same output.
  5. Avalanche Effect: A small change in the input should produce such a drastic change in output that the new hash is unrecognizable from the original.

Common Uses:

  1. Data Integrity: To verify the integrity of data during transmission.
  2. Password Storage: Storing the hash of a password rather than the password itself.
  3. Digital Signatures: To verify the authenticity and integrity of a message or document.
  4. Cryptocurrencies: Used in blockchain technology to link blocks together.

Popular Cryptographic Hash Functions:

  1. SHA-256 (Secure Hash Algorithm 256-bit): Widely used and forms the basis of the Bitcoin blockchain.
  2. MD5 (Message Digest Algorithm 5): Older and found to have vulnerabilities.
  3. SHA-1: Previously widely used but now considered vulnerable to well-funded attackers.
  4. SHA-3: The latest member of the Secure Hash Algorithm family, released by NIST in 2015.

Benefits:

  1. Security: Provides a secure way to verify data integrity and authenticity.
  2. Efficiency: Quick to compute, ensuring systems run efficiently.
  3. Fixed Size: No matter the size of the input, the hash value size remains consistent.

Challenges:

  1. Vulnerabilities: Some older hash functions, like MD5 and SHA-1, have vulnerabilities that have been exploited.
  2. Collision: While hash functions are designed to be collision-resistant, it’s not impossible for two different inputs to produce the same output.
Previous PostNext Post

Subscribe To Our Newsletter

For updates and exclusive offers, enter your e-mail below.

 

CryptoCurrencyUSDChange 1hChange 24hChange 7d
Bitcoin61,636 2.41 % 0.66 % 12.78 %
Litecoin79.05 2.63 % 2.03 % 19.52 %
XRP0.4850 2.21 % 2.58 % 20.42 %
Ethereum2,197.2 0.23 % 0.67 % 2.46 %
Dogecoin0.1461 3.44 % 2.45 % 25.55 %
USDC1.000 0.10 % 0.02 % 0.08 %
Cardano0.2543 0.15 % 1.68 % 3.38 %
Tether0.9990 0.10 % 0.04 % 0.02 %
Binance Coin (Wormhole)222.47 0.38 % 4.71 % 3.08 %