Internal implementation

1.	Go to Options->S/MIME

2.	Check Internal Implementation

Always encrypt to sender's certificate

Checked, The Bat! will encrypt every message for senders with certificates.

Cache Certificate Phrase

Choose the timespan a passphrase should be stored in memory before you have to re-enter it.

Compress data before encryption

Compression reduces message size and makes the message more resistant to attacks.

Beware: S/MIME compression is not widely adopted and may not be supported by other S/MIME-enabled e-mail client. Microsoft CryptoAPI does not support comppression!

Encryption Algorithm

Choose your preferred encryption algorithm: RC2 (128bits), 3DES (156 bits) or IDEA (128 bits).

Beware: Due to patent restrictions IDEA is not widespread, itmay not be supported by your recipient!

IDEA is patented in the following countries: Austria, France, Germany, Italy, Netherlands, Spain, Sweden, Switzerland, United Kingdom, United States. A license must be purchased from MediaCrypt AG for any use of IDEA for commercial purposes in the above countries.

MediaCrypt AG, Technoparkstrasse 1, 8005 Zurich (Switzerland); Tel.: +41-1-445 3070; Fax: +41-1-445 3071; http://www.mediacrypt.com/; info@mediacrypt.com.

Signing Hash Algorithm

Specifies which HASH algorithm is used

The default SHA-1 is widely supported and highly secure; MD-5 is your choice if your recipient's S/MIME implementation does not support SHA-1.

Random Seed File

Specifies the path where random data for key generation is stored.