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Posts Tagged ‘mail.app’

Enhanced Security: AES-256 Encryption for SSL and TLS

Tuesday, December 1st, 2020

AES-256 EncryptionSSL and TLS play critical roles in securing data transmission over the internet, and AES-256 is integral in their most secure configurations. The original standard was known as Secure Sockets Layer (SSL). Although it was replaced by Transport Layer Security (TLS), many in the industry still refer to TLS by its predecessor’s acronym. While TLS can be relied on for securing information at a high level—such as US Government TOP SECRET data—improper or outdated implementations of the standard may not provide much security at all.

Variations in which cipher is used in TLS impact how secure TLS ultimately is. Some ciphers are fast but insecure, while others are slower, require a greater amount of computational resources, and can provide a higher degree of security. Weaker ciphers—such as the early export-grade ciphers—still exist, but they should no longer be used.

The Advanced Encryption Standard (AES), is an encryption specification that succeeded the Data Encryption Standard (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. It is often seen as the gold standard symmetric-key encryption technique, with many security-conscious organizations requiring their employees to use AES-256 for all communications. It is also used prominently in TLS.

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How to Install S/MIME (and PGP) Encryption Certificates into Major Email Clients

Wednesday, May 27th, 2009

We at LuxSci are always being asked questions about various email programs and their usage.  With HIPAA compliance becoming more and more important, we get a lot of inquiries regarding secure email. One of the most frequently asked questions is how to install S/MIME security certificates in various email programs that our servers support. Sometimes finding instructions on installing security certificates in various email clients is difficult, even with the help of search engines. To make your search easier, we have complied instructions for several of the the major email clients:

  • S/MIME for Outlook 2003
  • S/MIME for Outlook 2007
  • S/MIME for Mail.app
  • S/MIME for Entourage
  • S/MIME for Thunderbird
  • PGP for Thunderbird via the Enigmail Add-on.

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Viewing the Message Source / Full Headers of an Email

Wednesday, February 4th, 2009

When diagnosing issues with email delivery and analyzing the properties of an email message, it is almost always the case that one needs to obtain either the “full headers” of the message or the “source” of the message.

The “message source” is the complete raw content that represents the message.  This includes all of the “metadata” about the message (who its from and to, the subject, etc.) as well the body content and all of the attachments. The full message source really contains two distinct parts — the full headers and the body.  The full headers are at the beginning of the message source and continue until a blank line is reached;  one or more blank lines separate the headers from the body.

In this article, we are not going to discuss what is in the headers or body, or how that information is formatted.  Instead, we will show you how to retrieve this information when using different kinds of email programs and web-based systems.  With these instructions, you should be able to get the “full headers” from any email message located in most email systems.  This information can be helpful to your technical support representatives when analyzing message behavior.

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