sftp - How to securely deploy PPK file in WPF C# app? -

i have c# app connects sftp server transfer log files. app achieves using winscp .net assembly connect server.

how securely store .ppk private key file such user not able take file access sftp themselves?

http://winscp.net/eng/docs/library#csharp

based on way library reference .ppk, may not possible avoid storing .ppk file on local disk during run-time?

thanks in advance.

since winscp .net assembly calling command-line scripting interface there no way this. i'm 1 of developers of edtftpnet/pro, native .net implementation of various file-transfer protocols, including sftp. our interface allows set private key using byte-array (see secureftpconnection.clientprivatekeybytes). our product not free, should want go.