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Page 24 IT Administrators Guide

3.4.6 Security and Skype for SIP

Skype for SIP does not, currently, offer sRTP or other forms of voice encryption. Voice

trafc should therefore be considered in the same light as non-encrypted email and other

data trafc.

If you feel that you may be at risk of ‘man in the middle’ or spoong attacks you should

seek the advice of a specialist network security consultancy.

For more information on using Skype for SIP, please see the Skype for SIP Requirements

Guide and the Skype for SIP User Guide for Skype Manager.

3.4.7 Security summary

Use the following security procedures when deploying Skype:

Before deployment, ensure you have an authentic copy of Skype. Check the

installer’s digital signature and follow the limitations in our End User License

Agreement and Terms of Service before using Skype.

To ensure everyone in your company is using the same version of Skype across

your company, use the Windows Installer Package (MSI) that comes with the PC

version of Skype for Business.

Instruct your users not to install their own copy of Skype on their machines and

centrally manage all Skype installations, manage version control and upgrades

and reduce the risk of malware from unauthorized, third party installers.

Where it's not possible to centrally manage installation, advise your users to

download Skype only from our website at skype.com/business and ensure

that when a new version of Skype is available, it is automatically downloaded

by going to Tools > Options > Advanced and ticking the Notify me and

Automatically download and install it boxes.

Keep your machines’ patches up-to-date. Many online security problems can be

traced back to improperly patched computers.

Use anti-virus protection, keep the virus denitions updated and monitor alerts

and logs for potential problems.

Know who you’re authorizing and don’t hesitate to block users who make

unwanted contact.

Keep user proles up-to-date and remember that everything in user proles

(except email addresses) can be seen by others.

Always authenticate third parties before discussing any condential business or

sensitive personal information.

Remember that although Skype takes care to protect communications from

unwanted disclosure, there is a remote possibility that your computer, or that of

your contact, could have been hacked or compromised.

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Skype - 2.0 Guía de usuario Pagina 24