Classified along three independent dimensions:
The type of operations used for transforming plaintext to ciphertext
The number of keys used
symmetric (single key)
asymmetric (two-keys, or public-key encryption)
The way in which the plaintext is processed
Lecture Security + Guide to Network Security Fundamentals - Chapter 8 include objectives: Define cryptography, secure with cryptography hashing algorithms, protect with symmetric encryption algorithms, harden with asymmetric encryption algorithms, explain how to use cryptography.
Wireless Sensor Networks hold the promise of delivering a smart communication
paradigm which enables setting up an intelligent network capable of handling
applications that evolve from user requirements. With the recent technological
advances of wireless sensor network, it is becoming an integral part of our lives.
However, due to the nature of wireless sensor networks, researchers face new
challenges related to the design of algorithms and protocols.
What Is Needed to Build a VPN? Overlay and Peer-to-Peer VPN Architecture VPN Topologies Characteristics of a Secure VPNs VPN Security: Encapsulation VPN Security: IPsec and GRE VPN Security: Symmetric and Asymmetric Encryption Algorithms Symmetric Encryption Algorithms Asymetric Encryption Diffie-Hellman Key Exchange Data Integrity VPN Security: Authentication
There is a clear and urgent need for a national research network. This nation stands to gain considerably from the many direct and indirect benefits that would accrue from an NRN.
The OSTP report begins to address the basic issues for an NRN, but it is silent on many important issues, especially those pertaining to the relationship between the NRN and commercial network services. (Nevertheless, the fundamental recommendation for an NRN is sound, as far as it goes.)
This chapter introduces the concepts of cryptography and covers encryption, hashing, and digital signatures and how these techniques provide confidentiality, integrity, authenticity, and nonrepudiation. You will learn about algorithms, symmetric and asymmetric encryption, digital signatures, and Public Key Infrastructure (PKI).
In this paper, we propose an eﬃcient hardware implementation of this primitive that can be used for asymmetric digital signature, key exchange and asymmetric encryption. To our knowledge this is the ﬁrst hardware implementation of XTR.
Privacy Enhanced Mail (PEM) was the ﬁrst serious eﬀort to secure Internet
mail. The Internet Resources Task Force (IRTF) Privacy and Security Research
Group (PSRG) did the initial design. The Internet Engineering Task Force (IETF)
PEM Working Group continued development for three years, resulting in a four-
part Proposed Internet Standard published in early 1993    . PEM
is a broad standard suite, it provides encryption, authentication, message integrity
and key management. PEM supports both symmetric and asymmetric (public-
key) key management schemes.
So… Symmetric key (private key) encryption is fast and nice, but has what MAJOR problem?
Symmetric Key encryption, also doesn’t provide integrity concerns ;(
Asymmetric Key/public key encryption can be combined with Symmetric Key encryption to solve BOTH problems, but Symmetric Key encryption has what problem of it’s own?
Abstract Elliptic curve cryptosystems oﬀer security comparable to that of traditional asymmetric cryptosystems, such as those based on the RSA encryption and digital signature algorithms, with smaller keys and computationally more eﬃcient algorithms.