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Cryptography and Encryption Basics - I

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Cryptography and Encryption Basics I What is encryption Encryption is the process of encoding a message or information in such a way that only authorized parties can access it and those who are not authorized can't.  Converts information from plain text into encrypted ciphertext. But how...? Encryption used algorithm! An algorithm is a procedure that the encryption process follows. The specific algorithm is called the ciper or code. there are many types so encryption algorithms. The encryption's goal and level of security determine the most effective solution. Triple DES, RSA and Blowfish are some examples of encryption algorithms or Ciphers. What is Decryption? Decryption is the process of taking encoded or encrypted text or other data and converting it back into text that you or the computer can read and understand.  converts information from encrypted ciphertext into plain text  Basic Example  Private key vs Public Key Private Key (symmetric key): This means that ...
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Overview of ISO/SAE 21434 Standard

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ISO/SAE 21434, jointly published by the International Standardization Organization (ISO) and the Society of Automotive Engineers (SAE), serves as a comprehensive cybersecurity framework for electronic systems within road vehicles. Developed to bolster cybersecurity across the entire lifecycle of automotive products, this standard outlines essential vocabulary, objectives, requirements, and guidelines. Purpose and Scope: The primary objective of ISO/SAE 21434 is to enhance cybersecurity measures for vehicles throughout their lifecycle. By providing a standardized framework, this standard facilitates the establishment of cybersecurity policies, risk management practices, and a cybersecurity-oriented culture within organizations operating in the automotive industry. Three Pillars: ISO/SAE 21434 is structured around three main pillars: Cyber Security Governance:   Establishing policies, processes, and cultural norms to govern cybersecurity activities within organizations. Risk Man...
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UDS Protocol Interview Question

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UDS Protocol Interview Question  Functional Group in UDS Diagnostic and communicatio management Data Transmission Stored Data Transmission Input/Output Control Remote Activation of Rountine Upload / Download Total (27 )services untill 2020,As Per ISO 14229 2020 there are (28) services. Why it is called UDS Unified       - Term 'Unified' in this context mens  that it is an international and not a Company- Specific Standard Diagnostic - Finding Root cause Service       - checking with existing content What are the types of request in UDS Valid request  Invalid request What are types for Responce in UDS. Positive responce Negative Responce What are type of NRC ISO Specific (0x12,0x13,0x22) ISO Reserved or Manufacture Specific (0x32,0x84 etc) What are the commonly used NRC 0x12 0x13 0x22 0x24 0x33 In Default which session will be active UDS supports different Operating session, which can be changed using the "Diagnostic Session control". Dependi...
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