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What is the differents between password and passcode?

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A passphrase is a sequence of words or other text used to control access to a computer system, program or data. A passphrase is similar to a password in usage, but is generally longer for added security. Passphrases are often used to control both access to, and operation of, cryptographic programs and systems. Passphrases are particularly applicable to systems that use the passphrase as an encryption key. The origin of the term is by analogy with password. The modern concept of passphrases is believed to have been invented by Sigmund N. Porter in 1982.

Passphrases differ from passwords. A password is usually short—six to ten characters. Such passwords may be adequate for various applications (if frequently changed, if chosen using an appropriate policy, if not found in dictionaries, if sufficiently random, and/or if the system prevents online guessing, etc.) such as:

  • Logging onto computer systems
  • Negotiating keys in an interactive setting (e.g. using password-authenticated key agreement)
  • Enabling a smart-card or PIN for an ATM card (e.g. where the password data (hopefully) cannot be extracted)

But passwords are typically not safe to use as keys for standalone security systems (e.g., encryption systems) that expose data to enable offline password guessing by an attacker. Passphrases are theoretically stronger, and so should make a better choice in these cases. First, they usually are (and always should be) much longer—20 to 30 characters or more is typical—making some kinds of brute force attacks entirely impractical. Second, if well chosen, they will not be found in any phrase or quote dictionary, so such dictionary attacks will be almost impossible. Third, they can be structured to be more easily memorable than passwords without being written down, reducing the risk of hardcopy theft. However, if a passphrase is not protected appropriately by the authenticator and the clear-text passphrase is revealed its use is no better than other passwords. For this reason it is recommended that passphrases not be reused across different or unique sites and services.

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While passwords and passphrases essentially serve the same purpose – providing access to secure services or sensitive information – passwords are generally short, hard to remember and easier to crack. Passphrases are easier to remember and type. They are considered more secure due to the overall length of the passphrase and the fact that it shouldn’t need to be written down. Here are some tips for creating a good passphrase: Make up a sentence or a phrase that includes a combination of upper and lower case letters, special characters and punctuation. Include some memorable “encoding” in the phrase. For example, “Iowa winters are cold” would not be an acceptable passphrase, as it does not include two special characters or numbers. But “Iowa w1nters are c0ld!” meets minimum complexity requirements in addition to having a secure length of nine or more characters.

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Bigjoe basically the difference between a password and a passcode is that passwords are basically words while passcodes are numbers.

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