How AES Encrypts/Decrypts A Long Message
Minh Nguyen In the previous topic, we got idea that how AES encrypts/decrypts plaintext with 16 bytes length. However, what happens when the plaintext exceeds 16 bytes? ECB (Electronic Codebook): In ECB…
Advanced Encryption Standard (AES)
AES also known by its original name Rijndael is a symmetric block cipher algorithm, which means the sender and receiver use the same key for encryption and decryption. AES operates on…
Elliptic Curve Digital Signature Algorithm
DSA taking a expensive computation operation because it uses modular exponentiation and modular inverse. So in the small computer like microcontroller, we need the light weight algorithms. Elliptic Curve Digital…
Digital Signature Algorithm
What is a digital signature? In the physical world, document verification is done through signatures. For example, if you send me a document with your signature, I trust its authenticity…
RSA (Rivest–Shamir–Adleman)
RSA (Rivest–Shamir–Adleman) is one of the first public-key cryptosystems and is widely used for secure data transmission. It's also used in TLS handshake. The foundation of RSA lies in asymmetric encryption, where a key…
Part 3 – Elliptic-Curve Diffie–Hellman (ECDHE)
In the preceding sections, we explored the concept and properties of Elliptic Curve Finite Fields. In this topic, we dive into an application of the Elliptic-Curve Diffie–Hellman (ECDHE) which is…
Part 2 – Elliptic Curves Over Finite Fields
In the previous topic, we already know what is Elliptic Curves. Now, we go further with the Elliptic Curves Over Finite Fields. Modulo \( \text{When a number modulo a number…
Part 1 – Elliptic Curve Cryptography (ECC)
I wrote this series because I am inquisitive about some strange things in the TLS series. Elliptic-curve Diffie–Hellman (ECDHE) is one of them. Please check TLS-part 1 to get the details.…
[SSL/TLS] Part 4 – Introduce WolfSSL
What is WolfSSL? If you are an embedded developer, you might be familiar with mbedTLS, a widely used TLS library for embedded systems. However, mbedTLS is not the only option.…
[SSL/TLS] Part 3 – Local HTTPS server
When developing or testing a website or application that requires secure communication over HTTPS, you might need a certificate to encrypt the data and authenticate the server. However, obtaining a…