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It is also very effective to combine the mnemonic and random technique by saving long randomly generated passwords with a password manager, which will be in turn accessed with a memorable 'master password' that must be used only for that purpose. Most people do a generally good job of protecting their physical valuables from attack, and it is easier for most people to understand physical security best practices compared to digital security practices. Take for instance “the girl is walking down the rainy street” could be translated to t6!WdtR5 or, less simply, approach could make it easier to remember a password, but note that the various letters have very different probabilities of being found at the start of words ( Wikipedia:Letter frequency).Īnother effective technique can be to write randomly generated passwords down and store them in a safe place, such as in a wallet, purse or document safe. One technique for memorizing a password is to use a mnemonic phrase, where each word in the phrase reminds you of the next character in the password. Dictionary based passphrases are also supported. It is possible to customize the generation in a GUI. This technique is more difficult, but can provide confidence that a password will not turn up in wordlists or 'intelligent' brute force attacks that combine words and substitute characters.Īpart from password management, keepassxc offers password/passphrase generation. Over time, increase the number of characters typed - until the password is ingrained in muscle memory and need not be remembered.

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One memorization technique (for ones typed often) is to generate a long password and memorize a minimally secure number of characters, temporarily writing down the full generated string. However, these passwords can be difficult to memorize. Tools like pwgen or apg AUR can generate random passwords. Weak hash algorithms allow an 8-character password hash to be compromised in just a few hours. The best choice for a password is something long (the longer, the better) and generated from a random source. photocopyhauntbranchexpose) including with character substitution (e.g. Common phrases or short strings of dictionary words (e.g.Root 'words' or common strings followed or preceded by added numbers, symbols, or characters (e.g., DG091101%).Simple character substitutions on words (e.g., k1araj0hns0n), as modern dictionary attacks can easily work with these.Personally identifiable information (e.g., your dog's name, date of birth, area code, favorite video game).

Insecure passwords include those containing: In cryptography the quality of a password is often referred to as its entropy. The tenets of strong passwords are based on length and randomness.

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personal information, or cracked using methods like social engineering or brute-force attacks. Passwords must be complex enough to not be easily guessed from e.g. They are the main way a computer chooses to trust the person using it, so a big part of security is just about picking secure passwords and protecting them. They secure your user accounts, encrypted filesystems, and SSH/ GPG keys. Create a plan ahead of time to follow when your security is broken.

You can never make a system 100% secure unless you unplug the machine from all networks, turn it off, lock it in a safe, smother it in concrete and never use it.

If anything sounds too good to be true, it probably is! When one layer is breached, another should stop the attack.

Defense in depth: Security works better in independent layers.

The principle of least privilege: Each part of a system should only be able to access what is strictly required, and nothing more.

The biggest threat is, and will always be, the user.

The trick is to create a secure and useful system. Security and convenience must be balanced.

It is possible to tighten security to the point where the system is unusable.

This article contains recommendations and best practices for hardening an Arch Linux system.

Mandatory access control