A secure messaging channel is necessary especially when the message involves confidential transactions, for example a bank transaction which involves funds transfer and other additional information. The present disclosure describes securing message. The method of securing a message comprises providing a personal identification number by the user, wherein the personal identification number is associated to a unique number of a user. The unique number can be a mobile number. The correct personal identification number invokes the one-time password generator. The one time password generator accesses a metadata which comprises a value stored. The value stored in the metadata is retrieved to generate a dynamic key. The dynamic key is converted to a symmetric encryption key to encrypt the data. The dynamic key can also be converted to a symmetric decryption key to decrypt the data.