Security is a crucial aspect of data communications and computer networking. Computer engineering assignments writing help students understand the different implementations of security concepts in the field.
The experts from Instant Assignment Help Australia bring to you this article highlights the importance of and the ideas behind computer network security.
Cryptography in Network Security
Security in networking depends primarily upon cryptography. Cryptography can provide several aspects of safety during data transfer, such as:
- Confidentiality
- Integrity
- Authentication
- Non-repudiation of messages
Cryptographic techniques and their implementations are a complicated aspect of network communications. Most students need expert computer engineering assignment writing assistance while dealing with the underlying algebraic concepts of cryptography. Instant Assignment Help Australia has the perfect array of expert writers who can provide comprehensive help in such cases.
The simple idea behind cryptography is the encryption of plaintext into encrypted ciphertext.
- An encryption algorithm carries out this transformation before the data is sent on its way to the destination.
- A decryption algorithm then decrypt the message once it reaches its destination.
- Encryption and decryption algorithms are referred to as ciphers. And, the key is the set of numbers that ciphers rely upon for encryption and decryption.
Cryptographic measures in security
Ensuring message confidentiality using symmetric and asymmetric -key cryptography
Keeping transmitted messages confidential involves the sharing of a session key between the receiver and the sender. This session key is exchanged between two users via symmetric-key cryptography. The same symmetrically encrypted session key encrypts and decrypts information.
Thus, there is always a risk of a security breach in case of a compromise.
Asymmetric-key cryptography overcomes this limitation by generating two keys, one public and the other private. The public key is used for encryption and is declared publicly. The private key helps decrypt the data.
Maintaining message integrity using fingerprinting
In networking, a message and the message digest pair help preserve its integrity. The hash function is a unique function that creates a compressed image of the original message. This is the message digest or fingerprint that needs to be kept secret.
The digest or Modification Detection Code (MDC) is created on the sender’s side and is sent alongside the message. To check for message integrity, the receiver utilizes the hash function again, runs the received message through it, and then compares the generated digest with the received digest.
Checking message authentication using MAC
MAC or Message Authentication Code helps determine the authenticity of a message. The simplest version of generating a MAC is by sharing a symmetric key between two users and implementing a keyed hash function.
Digital signatures are a prevalent method of authentication today. Data and its signature are sent as separate documents for subsequent verification.
Preventing message repudiation via third parties
A trusted third party is a good mediator in cases of message repudiation or other breaches of security.
Summing Up!
And, with that, we wrap up this short write-up. Go through it thoroughly to understand the critical nuances of cryptography and network security. Study hard and in case of any nagging problem, seek assistance from the assignment experts of Instant Assignment Help Australia, the most trusted computer engineering assignment writing service on the Web. Security is a critical aspect of computer networking, and cryptography forms its core.
