Search results
Results from the WOW.Com Content Network
A related measure is the base-2 logarithm of the number of guesses needed to find the password with certainty, which is commonly referred to as the "bits of entropy". [9] A password with 42 bits of entropy would be as strong as a string of 42 bits chosen randomly, for example by a fair coin toss.
A password generator can be part of a password manager. When a password policy enforces complex rules, it can be easier to use a password generator based on that set of rules than to manually create passwords. Long strings of random characters are difficult for most people to memorize.
Or in another way; it raises minimum-entropy value of the password set. At the same time it excludes only low-entropy sets (e.g. all lower or all upper case) so the maximum-entropy value passwords are unaffected. The overall result is to force an increase in the median/mean entropy of the password pool.
In cryptography, a salt is random data fed as an additional input to a one-way function that hashes data, a password or passphrase. [1] Salting helps defend against attacks that use precomputed tables (e.g. rainbow tables), by vastly growing the size of table needed for a successful attack.
The above calculations of the Diceware algorithm's entropy assume that, as recommended by Diceware's author, each word is separated by a space. If, instead, words are simply concatenated, the calculated entropy is slightly reduced due to redundancy; for example, the three-word Diceware phrases "in put clammy" and "input clam my" become ...
PBKDF2 is for generating an encryption key from a password, and not necessarily for password authentication. PBKDF2 can be used for both if the number of output bits is less than or equal to the internal hashing algorithm used in PBKDF2, which is usually SHA-2 (up to 512 bits), or used as an encryption key to encrypt static data.
When password-guessing, this method is very fast when used to check all short passwords, but for longer passwords other methods such as the dictionary attack are used because a brute-force search takes too long. Longer passwords, passphrases and keys have more possible values, making them exponentially more difficult to crack than shorter ones ...
A password field in a sign-in form. A password, sometimes called a passcode, is secret data, typically a string of characters, usually used to confirm a user's identity.. Traditionally, passwords were expected to be memorized, [1] but the large number of password-protected services that a typical individual accesses can make memorization of unique passwords for each service impractica