A cryptographic system that uses two keys, a public key known to everyone and a private key, the private key has full control to the key owner, and has to keep in secured environment. A unique element to the public key system is that the public and private keys are related in such a way that only the public key can be used to encrypt messages and only the corresponding private key can be used to decrypt them. Moreover, it is virtually impossible to deduce the private key if you know the public key.
A digital signature is a mathematical technique used to validate the authenticity and integrity of a message, software or digital document.
Digital signatures are based on public key cryptography, also known as asymmetric cryptography.
So your Carted accountant cannot transfer property and funds from your bank account in his name by using digital signature.Property can transfer only through power of attorney or any deed of registration. physical presence must be required for that purpose