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I'm interested in learning about encryption methods that are relevant to industry today. AES-256 vs. 3DES vs. DES vs. SSL/TLS vs PPTP vs. IPSec vs. OTHERS. <br />
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What is the difference, what are obvious ways to identify each, and what are the main uses of each? Please break down into quick notes on each, which can assist myself and others to absorb the material quickly. I have been reading wiki pages and I would like this information condensed and ELI5'd. <br />
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Thanks,<br />
Tanner
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I'm interested in learning about encryption methods that are relevant to industry today. AES-256 vs. 3DES vs. DES vs. SSL/TLS vs PPTP vs. IPSec vs. OTHERS. 

What is the difference, what are obvious ways to identify each, and what are the main uses of each? Please break down into quick notes on each, which can assist myself and others to absorb the material quickly. I have been reading wiki pages and I would like this information condensed and ELI5'd. 

Thanks,
Tanner

CISSP Examination: Can someone give me a breakdown of different encryption methods I would need to know?

Encryption is the process of encoding messages or information in such a way that only authorized parties can read it. In an encryption scheme, the intended communication information or message, referred to as plaintext, is encrypted using an encryption algorithm, generating ciphertext that can only be read if decrypted. For technical reasons, an encryption scheme usually uses a pseudo-random encryption key generated by an algorithm. An authorized recipient can easily decrypt the message with the key provided by the originator to recipients, but not to unauthorized interceptors.

Encryption

Security is the protection of information systems from theft or damage to the hardware, the software, and the information on them, as well as from disruption or misdirection of the services they provide. The main goal of security is protecting assets, and an asset is anything of value and worthy of protection.  Information Security is a discipline of protecting information assets from threats through safeguards to achieve the objectives of confidentiality, integrity, and availability or CIA for short. On the other hand, disclosure, alteration, and disruption (DAD) compromise the security objectives.

Security

Operating system security (OS security) is the process of ensuring OS integrity, confidentiality and availability. OS security refers to specified steps or measures used to protect the OS from threats, viruses, worms, malware or remote hacker intrusions. OS security encompasses all preventive-control techniques, which safeguard any computer assets capable of being stolen, edited or deleted if OS security is compromised, including authentication, passwords and threats to systems and programs.

OS Security

Network security consists of the policies adopted to prevent and monitor authorized access, misuse, modification, or denial of a computer network and network-accessible resources. Network security involves the authorization of access to data in a network, and covers a variety of computer networks; conducting transactions and communications among businesses, government agencies and individuals. Networks can be private, such as within a company, and others which might be open to public access.

Network Security

Internet Protocol Security (IPsec) is a protocol suite for secure Internet Protocol (IP) communications by authenticating and encrypting each IP packet of a communication session. IPsec includes protocols for establishing mutual authentication between agents at the beginning of the session and negotiation of cryptographic keys to be used during the session. IPsec can be used in protecting data flows between a pair of hosts (host-to-host), between a pair of security gateways (network-to-network), or between a security gateway and a host (network-to-host). IPsec is an end-to-end security scheme operating in the Internet Layer of the Internet Protocol Suite.