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Information security (IS) is designed to protect the confidentiality, integrity and availability of computer system data from those with malicious intentions. Confidentiality, integrity and availability are sometimes referred to as the CIA Triad of information security. This triad has evolved into what is commonly termed the Parkerian hexad, which includes confidentiality, possession (or control), integrity, authenticity, availability and utility.
Information security handles risk management. Anything can act as a risk or a threat to the CIA triad or Parkerian hexad. Sensitive information must be kept - it cannot be changed, altered or transferred without permission. For example, a message could be modified during transmission by someone intercepting it before it reaches the intended recipient. Good cryptography tools can help mitigate this security threat.
Digital signatures can improve information security by enhancing authenticity processes and prompting individuals to prove their identity before they can gain access to computer data.