Lisäsalausta

Lisäsalausta is a Finnish term that translates to "additional encryption" or "layered encryption." It refers to the practice of applying multiple layers of encryption to data, either sequentially or in parallel, to enhance its security. This approach is often employed when dealing with highly sensitive information or in environments where the risk of compromise is considered significant.

The core principle behind lisäsalausta is that if one encryption layer is successfully breached, subsequent layers still protect the data. Different encryption algorithms and keys can be used for each layer, making it more complex for an attacker to decrypt the information. For instance, data might first be encrypted using AES (Advanced Encryption Standard) and then that encrypted output is further encrypted using a different algorithm like Twofish. Alternatively, different parts of the data could be encrypted with different keys or algorithms.

While lisäsalausta can significantly increase security, it also comes with drawbacks. The primary disadvantage is the performance overhead. Encrypting and decrypting data multiple times requires more computational resources and time, which can impact application speed and user experience. Furthermore, managing multiple encryption keys and algorithms can increase complexity in system administration and potentially introduce new avenues for error if not handled meticulously. The need for lisäsalausta is typically evaluated based on a risk assessment, balancing the enhanced security benefits against the performance and management costs.