EncryptedLogger.swift

    import CocoaLumberjack
    import Security

    public class EncryptedLogger: DDAbstractLogger {
        let key: SecKey!
        let blockSize : Int
        let padding : SecPadding
        
        init(key: SecKey!, blockSize : Int = 128, padding: SecPadding = .PKCS1) {
            self.key = key
            self.blockSize = blockSize
            self.padding = padding
        }

        convenience init(keyFilePath: String, blockSize: Int = 128, padding: SecPadding = .PKCS1) {
            //TODO: load key from file
            self.init(key: nil, blockSize: blockSize, padding: padding)
        }
        
        /**
         *  The log message method
         *
         *  @param logMessage the message (model)
         */
        public override func logMessage(logMessage: DDLogMessage!) {
            let plainText = logFormatter != nil ? logFormatter.formatLogMessage(logMessage) : logMessage.message;
            
            let plainTextData = [UInt8](plainText.utf8)
            
            var encryptedData = [UInt8](count: Int(blockSize), repeatedValue: 0)
            var encryptedDataLength = blockSize
            
            let result = SecKeyEncrypt(key, padding, plainTextData, plainTextData.count, &encryptedData, &encryptedDataLength)
            
            //TODO: write the encryptedData to a file or post it to some endpoint
            //...
        }

        @objc
        public override var loggerName: String! {
            get {
                return "\(self.dynamicType)"
            }
        }
    }

this is a draft only -- I use swiftyRSA