Cryptography Homework Help
Cryptography is a technique used in communication and information security.
It is derived from mathematical concepts and a set of rule-based calculations called algorithms. Cryptography transforms messages in ways that are hard to decipher. We use these deterministic algorithms for digital key signing, cryptographic key generation, verification and data privacy, web browsing, and confidential communications like credit card transactions and email.
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Cryptography draws some similarities with disciplines such as cryptography and cryptanalysis. It also includes techniques such as microdots, merging images with words, and other ways of securing information in transit. Today, in our computer-centric world, cryptography is usually associated with converting plain text (ordinary texts), sometimes referred to as cleartext, to ciphertext.
This process is known as encryption. The process of reading an encrypted message is called decryption and the individuals who are involved in cryptography are known as cryptographers.
Modern cryptography aims to achieve the following objectives:
The encrypted information should not be understood by everyone or anyone it was unintended. Instead, it should only be decrypted by the recipient that was meant to receive it.
The information in storage or transit should not be altered in any way. Suppose some changes are made, the receiver should be able to detect them.
The sender or creator of the message at a later stage cannot deny its transmission or his/her intentions in creating the message. For example, in the US, cryptography messages can be used as evidence in a court case.
Since the sender and the receiver are familiar with each other, they can easily confirm each other’s identity and the destination or origin of the message. Cryptosystems are the procedures and protocols that mean some of the criteria mentioned above. Cryptosystems often refer to mathematical procedures and computer programs only.
They can also include particular human behavior regulation such as choosing hard-to-guess passwords, discussing sensitive procedures with outsiders, and logging off unused systems. Avail of our cryptography homework help service if for any reason you cannot complete the assignment allotted to you by your professor.
Cryptographic algorithms are a set of procedures that are used by cryptosystems.
They are also known as ciphers that are used to encrypt and decrypt messages. Cryptographic algorithms secure communication among computer systems, applications, and devices such as smartphones. In a cipher suite, there is one algorithm for encryption, one for message authentication, and another one for key exchange.
This whole process is written in the software and embedded in protocols that run on operating systems and networked systems. It involves private and public key generation for data encryption and decryptions, digital signing of the information and authenticating the message, and key exchange. We recommend that you take our cryptography homework help if you want to learn more about cryptographic algorithms.
Our Cryptography Assignment Help caters to the following types of cryptography
Single-key (symmetric- key) encryption
This type of encryption means that the same key is used to encrypt and decrypt a message. There are two types of single key algorithms (ciphers):
This is a type of symmetric algorithm that encrypts the data as a stream of bits, one bit at a time. Our cryptography assignment help experts are well-versed with all these types of ciphers. You can rely on them to produce remarkable solutions for assignments in these areas.
In a block cipher algorithm, data is divided into blocks and encrypted one block at a time. The blocks are often 64-bit. However, newer algorithms sometimes use 128-bit blocks. An example of symmetric-key cryptography includes Advanced Encryption Standard (AES), which is a specification established in November 2001 by the National Institutes of Standards and Technology as a Federal Information Processing Standard (FIPS197).
This standard was created to protect sensitive information and was mandated by the US government. It is widely used in the private network.
The US government approved AES in June 2003 to be used for classified information and is a royalty-free specification implemented in the world of software and hardware world.
AES was preceded by DES (Data Encryption Standard) and DES 3, which uses longer key lengths to prevent brute force and other attacks. Please take our Cryptography assignment help service if you find that this concept is too complicated for you to handle.
Public-key (asymmetric-key) encryption
Public key encryption uses a pair of keys, public and private keys which are frequently but not necessarily interchangeable.
- The public key is associated with the creator or sender of the message.
This will enable him/her to authenticate the sender. Since the encryption and decryption process is automatic, users do not have to physically lock and unlock the message.
- The private key used for decryption and is known and shared by the sender.
Several protocols depend on asymmetric cryptography. This includes the protocols that make HTTPS possible like
- Transport Layer Security (TLS)
This type of encryption process can be used in software programs that need to establish a secure connection over an insecure network like the internet. An example of such applications includes a browser that may need to validate a digital signature.
- Secure Socket Layer (SSL).
The main benefit of asymmetric cryptography is increased data security. It does not require users to reveal or share their private keys. For this reason, there is a reduced chance of a cybercriminal discovering a user's private key during transmission.
Our help with cryptography assignment covers all concepts related to asymmetric cryptography.
The public key can be used by anyone to encrypt a message which can be deciphered by the intended recipient using their private key. You can use the recipient's public key to encrypt a message before sending it if you want to send an encrypted message.
The message will be decrypted using the recipient’s private key. Similarly, a sender can encrypt a message using their private key, then the recipient will use the sender's public key.
How does asymmetric cryptography works?
As we mentioned above, asymmetric encryption uses two mathematically related keys. These keys are used for encryption and decryption. If the sender uses a public key for encryption, then the related private key will be used for decryption. Similarly, if the sender uses a private key for encryption, then decryption can only be done using the related public key.
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Both the participants of the asymmetric encryption (the sender and the receiver) each have their pair of public and private keys. The sender first obtains the receiver's public key, then uses it to encrypt the plaintext to create ciphertext. The recipient then receives the ciphertext from the sender and decrypts it using their private key. This will turn the ciphertext to legible plain text.
The encryption function is one way. Meaning, even though two senders can have the public key of the receiver, one sender will be unable to read the messages of another sender. Buy cryptography assignments from us for more details on this.
Growing concerns of Cryptography
It is possible for cybercriminals to bypass cryptography and hack into computers that hold sensitive information. They can exploit weak implementations such as the use of default keys. However, cryptography is still highly-rated because it uses encryption algorithms to protect messages and data from attackers.
Currently, there are growing concerns related to the processing power of quantum computing to break current cryptography encryption standards. This led the NIST (National Institute of Standards and Technology) to ask the mathematical and scientific community to publish a paper on the new public-key cryptography standards. Quantum computers, unlike today's' computers, use qubits (quantum bits).
These bits can represent both 0s and 1s. For this reason, quantum computers can perform two calculations at once.
Although we may not see a large-scale quantum computer built in the next decade, the current infrastructure requires standardization of algorithms that are publicly known and understood.
These algorithms according to NIST offer a secure approach. Pay for cryptography assignment from the comfort of your home here at Programmingassignmenthelp.com
Our team of experts can handle probably any topic on cryptography. Here are some of the topics that students often ask us to deliver assignment solutions within the ambit of our cryptography project help.
- Security against plaintext attacks
- Symmetric key cryptography
- Symmetric ciphers
- Problems of secret communication
- Message Authentication Codes
- Differential and linear cryptanalysis
- Hash function
- Web security
- Data encryption standard
- Cryptographic natives
- Semantic security
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