Encryption protects passwords by transforming them into a secure format that is unreadable without the appropriate decryption key or method. Here’s how it works:
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Transformation: When a password is encrypted, it is converted into a string of characters that appears random and does not resemble the original password. This transformation is done using encryption algorithms.
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One-Way Function: Many password storage systems use hashing (a form of encryption) which is a one-way function. This means that once a password is hashed, it cannot be easily reversed to retrieve the original password. Common hashing algorithms include SHA-256 and bcrypt.
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Salt: To further enhance security, a unique random value called a "salt" is often added to each password before hashing. This ensures that even if two users have the same password, their hashed values will be different, making it harder for attackers to use precomputed tables (rainbow tables) to crack passwords.
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Storage: Encrypted or hashed passwords are stored in a database. When a user attempts to log in, the entered password is encrypted or hashed using the same method, and the resulting value is compared to the stored value. If they match, access is granted.
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Protection Against Breaches: In the event of a data breach, attackers who gain access to the database will only see the encrypted or hashed passwords, not the actual passwords themselves. This significantly reduces the risk of unauthorized access to user accounts.
By employing these techniques, encryption helps ensure that passwords remain secure and protected from unauthorized access.
