| 摘要 |
The embodiment of the present invention discloses a method, a device and a system for data transmission, wherein the method determines the communications encryption/decryption algorithm and key within the security domain and an encryption/decryption algorithm supported by every encryption/decryption device according to an encryption/decryption device list within the security domain, wherein the communications encryption/decryption algorithm within the security domain is used to transmit data within the security domain between encryption/decryption devices; sends to each encryption/decryption device within the security domain encryption/decryption information containing the communications encryption/decryption algorithm and key within the security domain used by every encryption/decryption device according to the encryption/decryption information to encrypt or decrypt data transmitted between other encryption/decryption devices in the security domain. The embodiment of the present invention, being a data transmission method, a device and a system for determining via a security management device the encryption/decryption algorithm and key for data transmission within the security domain, can guarantee secure data transmission in the security domain while consolidating, coordinating, and managing algorithms and keys for data transmission within the security domain, thereby alleviating key coordination problems. |
