security

security

1. firewall

   • prevents harmful data entering your computer
   • used to help protect a computer network from intruders
   • used when program is trying to connect to another
   • controlls which programs can send and receive data packets
   • a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.
   • A firewall typically establishes a barrier between a trusted internal network and untrusted external network, such as the Internet.

2. anti-virus

   • anti-virus needs to do updates and scans regularly because it keeps your computer safe by detecting viruses
   • ani-virus updates the computer periodically
   • protects against maliciouis software
   • anti-virus software (often abbreviated as AV), sometimes known as anti-malware software, is computer software used to prevent, detect and remove malicious software.
   • Antivirus software was originally developed to detect and remove computer viruses, hence the name.
   • with the proliferation of other kinds of malware, antivirus software started to provide protection from other computer threats

3. password

   • A password is a word or string of characters used for user authentication to prove identity or access approval to gain access to a resource (example: an access code is a type of password), which is to be kept secret from those not allowed access.
   • The use of passwords is known to be ancient.
   • Despite the name, there is no need for passwords to be actual words; indeed passwords which are not actual words may be harder to guess, a desirable property.

4. Encryption

   • One such option is to encrypt your entire device. This means that every time you power your phone on, you'll need either a numeric pin or password to decrypt the device.
   • to encrypt a message you need to use a key cyther
   • to decrypt a message you need to use a key
   • we use encryption when hackers try to hack our personal information
   • you will know if a website is using encryption becuse they will be secure
   • In cryptography, encryption is the process of encoding a message or information in such a way that only authorized parties can access it and those who are not authorized cannot. Encryption does not itself prevent interference, but denies the intelligible content to a would-be interceptor.
   • an encryption scheme, the intended information or message, referred to as plaintext, is encrypted using an encryption algorithm – a cipher – generating ciphertext that can be read only if decrypted.
   • For technical reasons, an encryption scheme usually uses a pseudo-random encryption key generated by an algorithm.