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Public key certificate. In cryptography, a public key certificate, also known as a digital certificate or identity certificate, is an electronic document used to prove the validity of a public key. [ 1][ 2] The certificate includes the public key and information about it, information about the identity of its owner (called the subject), and the ...
Public-key cryptography. An unpredictable (typically large and random) number is used to begin generation of an acceptable pair of keys suitable for use by an asymmetric key algorithm. In an asymmetric key encryption scheme, anyone can encrypt messages using a public key, but only the holder of the paired private key can decrypt such a message.
An example of a physical security measure: a metal lock on the back of a personal computer to prevent hardware tampering. Computer security (also cybersecurity, digital security, or information technology (IT) security) is the protection of computer software, systems and networks from threats that may result in unauthorized information disclosure, theft of (or damage to) hardware, software, or ...
Symmetric-key algorithms[ a] are algorithms for cryptography that use the same cryptographic keys for both the encryption of plaintext and the decryption of ciphertext. The keys may be identical, or there may be a simple transformation to go between the two keys. [ 1] The keys, in practice, represent a shared secret between two or more parties ...
The Secure Shell Protocol ( SSH) is a cryptographic network protocol for operating network services securely over an unsecured network. [ 1] Its most notable applications are remote login and command-line execution. SSH was designed for Unix-like operating systems as a replacement for Telnet and unsecured remote Unix shell protocols, such as ...
In the computer security or Information security fields, there are a number of tracks a professional can take to demonstrate qualifications. [Notes 1] Four sources categorizing these, and many other credentials, licenses, and certifications, are:
Computer security software or cybersecurity software is any computer program designed to influence information security.This is often taken in the context of defending computer systems or data, yet can incorporate programs designed specifically for subverting computer systems due to their significant overlap, and the adage that the best defense is a good offense.
A GoldKey security token connected to a laptop. A security token is a peripheral device used to gain access to an electronically restricted resource. The token is used in addition to, or in place of, a password. [ 1] Examples of security tokens include wireless key cards used to open locked doors, a banking token used as a digital authenticator ...