Employment of Cryptography

Cryptography is the practice and study of techniques for secure communication in the presence of third parties. It involves creating written or generated codes that allow information to be kept secret. Cryptography converts data into a format that is unreadable for an unauthorized user, allowing it to be transmitted without unauthorized entities decoding it back into a readable format, thus compromising the data.

Basic Use of Cryptography

  1. Data Confidentiality: Ensuring that private or sensitive data remains inaccessible to unauthorized users.
  2. Data Integrity: Protecting data from being altered or tampered with.
  3. Authentication: Verifying the identity of a person or device, often through digital signatures or certificates.
  4. Non-Repudiation: Preventing the denial of previous commitments or actions, such as sending a message.

Common Cryptographic Methods and Their Primary Uses

  1. Symmetric-Key Cryptography:
  1. Asymmetric-Key Cryptography (Public Key Cryptography):
  1. Hash Functions:
  1. Digital Signatures:

Key Considerations

Cryptography plays a critical role in securing digital information and communications, with various methods tailored to specific security needs and contexts. The choice of cryptographic technique is a balance between security requirements, operational constraints, and the threat landscape.


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