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Posts Tagged ‘symmetric encryption’

The Case For Email Security

Tuesday, March 31st, 2015

We all know that regular email is insecure; however, it may surprise you to learn just how insecure it really is. For example, did you know that messages which you thought were deleted years ago may be sitting on servers half-way around the world? Or, that your messages can can sometimes be read and modified in transit, even before they reach their destination? Did you know that forging email is very, very easy?  Can you trust what you read in an email?  Email security was never designed in to the internet from the beginning and as a result, many different solutions have evolved to plug the multitude of resulting issues.

This article is designed to teach you about how email really works, what the real email security issues are, what mitigations to these are generally in use, and what else you can to to protect you email.

Case for Email Security

Information security and integrity are centrally important  as we use email for personal and business communication: sending confidential and sensitive information over this medium every day. While you are reading this article, imagine how these security problems could affect your business, your personal life, and your identity…. if they have not already.

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256-bit AES Encryption for SSL and TLS: Maximal Security

Wednesday, February 4th, 2015

SSL and TLS are the workhorses that provide the majority of security in the transmission of data over the Internet today. However, most people do not know that the degree of security and privacy inherent in a “secure” connection of this sort can vary from “almost none” to “really really good … good enough for US government TOP SECRET data”.  The piece which varies and thus provides the variable level of security is the “cipher” or “encryption technique”.  There are a large number of different ciphers — some are very fast and very insecure.  Some are slower and very secure.  Some weak ones (export-grade ciphers) are around from the days when the USA did not permit the export of decent security to other countries.

AES, the Advanced Encryption Standard, is a relatively new encryption technique/cipher that is the successor of DES.  AES was standardized in 2001 after a 5 year review, and is currently one of the most popular algorithms used in symmetric key cryptography (which, for example, is used for the actual data transmission in SSL and TLS).  It is also the “gold standard” encryption technique; many security-conscious organizations actually require that their employees use AES-256 (256-bit AES) for all communications.

This article discusses AES, its role in SSL, which web browsers and email programs support it, how you can make sure that you only use 256-bit AES encryption of all secure communications, and more.

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