What is the difference between encryption, encoding, and hashing?
Câu trả lời
To answer the interview question "What is the difference between encryption, encoding, and hashing?", you can provide the following detailed explanation:
Differences Between Encryption, Encoding, and Hashing
Encryption
Encryption is a process used to transform data into a format that is unreadable to unauthorized users. The primary goal of encryption is to ensure data confidentiality. This transformation is achieved using an encryption algorithm and a key. Only those who possess the correct decryption key can revert the encrypted data (ciphertext) back to its original form (plaintext).
Purpose: To protect sensitive information from unauthorized access.
Reversibility: Reversible by the intended recipient using the correct decryption key.
Types: Symmetric encryption (same key for encryption and decryption) and asymmetric encryption (different keys for encryption and decryption) [1][2][3][4][5][6][7][8][9].
Encoding
Encoding is the process of converting data from one format to another using a publicly available scheme. The main purpose of encoding is to ensure that data can be properly consumed by different systems, not to secure it. Encoding is typically used to maintain data usability and is easily reversible using the same algorithm that was used to encode the data.
Purpose: To transform data into a format that can be easily used by different systems.
Reversibility: Reversible using the same encoding algorithm.
Examples: ASCII, Unicode, Base64, URL encoding.
Security: Not intended for security purposes; it does not protect data from unauthorized access [1][3][4][5][6][8][9][10].
Hashing
Hashing is a process that converts data into a fixed-length string of characters, which is typically a hash value. The primary purpose of hashing is to ensure data integrity by detecting changes to the original data. Hashing is a one-way process, meaning that it is not possible t...
