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Limitations of RIM Cryptographic API support for cipher suites for the key

establishment algorithm

The RIM® Cryptographic API implementation of the TLS protocol and WTLS protocol supports the use of the RSA® public key

algorithm, DSA public key algorithm, and Diffie-Hellman key exchange algorithm, with the following limitations.

Cipher suite type Typical component limitation

export

• RSA and Diffie-Hellman: 1024 bytes or less

• elliptic curve: 163 bytes or less

non-export

• non elliptic curve operations: 4096 bytes

• elliptic curve operations: 571 bytes

Limitations to non-export cipher suite types are due to the computational constraints of a BlackBerry® device.

Security Technical Overview

Limitations of RIM Cryptographic API support for cipher suites for the key establishment algorithm

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Blackberry ENTERPRISE SOLUTION SECURITY - ENFORCING ENCRYPTION OF INTERNAL AND EXTERNAL FILE SYSTEMS ON DEVICES Guia do Utilizador Página 126