Welcome to the HCL Sametime® 11.6 administration documentation
- Accessibility features for Sametime
  Accessibility features help users who have a disability, such as restricted mobility or limited vision, to use information technology products successfully. HCL® strives to provide products with usable access for everyone.
- What's new in HCL Sametime
  This section describes what's new in HCL Sametime® 11.6 and Sametime® Meetings 11.6.
- Checklist to deploy Sametime
  This section provides information on reviewing the checklist to deploy the Sametime clients.
- Encryption usage in Sametime
  HCL® Sametime® uses several types of encryption to protect data.
- Planning
  This section describes the system requirements and server configurations needed for HCL Sametime 11.6.
- Installing
  This section provides information on installing and configuring the servers for HCL Sametime 11.6.
- Configuring
  This section provides information on configuring the servers for HCL Sametime 11.6.
- Securing
  This section provides information on securing HCL Sametime 11.6 environments.
- Administering
  This section provides information on administering HCL Sametime 11.6 environments.
- Uninstalling Sametime
  In the event that Sametime must be uninstalled, follow these steps to uninstall the Community, Proxy, and Meetings servers.
- Troubleshooting
  Troubleshooting and Support
- Migrating and Upgrading
  This section provides information on migrating and upgrading from an earlier Sametime release.
- Notices

Encryption usage in Sametime

HCL® Sametime® uses several types of encryption to protect data.

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Encryption usage

The following table lists the types of encryption for various types of data and the length of each type of encryption key.

Table 1. Encryption usage in Sametime
Algorithm	Mode	Related key length	Function
HMAC-SHA256	Signature	256-bit (via server shared secret)	JWT
SHA256	Integrity check	256-bit	Conversation integrity
RC2	Confidentiality (user data)	Various key length (40-bit/128-bit in different circumstances) (generated via Diffie-Helman)	Message encryption
TLS 1.2	In transit data	128/256-bit depending on cipher chosen	HTTPS c2s traffic
DTLS/SRTP	In transit data	256-bit	Media c2s traffic
OLM	In transit data	256-bit	E2EE c2c media
bcrypt	Stored data	10 salt rounds	Meeting password

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