# Posts in Cybersecurity

## [01-04-2019] Authenticated encryption

- 01 May 2019
- Location: Munich
- Language: English
- Category: Cybersecurity

With growing dependency on information technology and more at stake, the security aspect has become more vital than ever. Within this context acts authenticated encryption(AE) as a shared-key based transform whose goal is to provide secrecy, Integrity and authenticity of the encapsulated data [MB07]. AE combines traditional Symmetric Encryption (SE) with a Message Authentication Code (MAC) in different orders [CNS14]. This article introduces the different combinations of authenticated encryption and their applications.

## [03.03.2019] Encryption

- 03 March 2019
- Location: Munich
- Language: English
- Category: Cybersecurity

Encryption transforms a plain-text into a cipher-text using an encryption key. The process of reversing this operation uses also a key and is called “decryption” [Kes17]. These operations can be explained by the following formulas: \(C=E_{k}(P)\) and \(P=D_{k}(C)\), where P = plain-text, C = cipher-text, E = the encryption method, D = the decryption method, and k = the key [Kes17]. There exist several types of encryption (symmetric/asymmetric) and several ciphering techniques (block/stream) and modes etc [Kes17].

## [17-02-2019] Cryptography overview

- 17 February 2019
- Location: Munich
- Language: English
- Category: Cybersecurity

Cryptography is mostly associated with the development and creation of mathematical algorithms, which are used to insure various security aspects See [Tam06][Oak18]. It is the cornerstone of modern communications security and is based on various mathematical concepts and theories such as: number theory, computational complexity theory and probability theory [Kes17]. The following post provides a quick overview of various cryptography concepts such as encryption, decryption and hashing.