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Encryption is the operation of transforming a message (referred to as plaintext) to a cryptogram, which is a set of symbols unreadable to anyone except those possessing the readable key. The transforming process must be reversible and allow, therefore, to reconstruct the previously encrypted message when the readable key is available.

The encryption process takes place through the use of algorithms, complex mathematical functions that are applied to the message and make it unreadable without the decryption key. The encryption and decryption process can be described as follows:

Mail1Click uses open-source encrypted algorithms, universally known as actually being inviolable: TLS, RSA and AES. Within the context of a single communication, various levels of encryption are used with different algorithms and keys one within the other.

Transport Layer Security (TLS)>

Transport Layer Security (TLS) is a protocol that ensures privacy between communicating applications and their users on the Internet. When a server and a client communicate, TLS ensures that no third party may eavesdrop or tamper with any message. TLS is the successor to the Secure Sockets Layer (SSL). More details:
Wikipedia: http://en.wikipedia.org/wiki/Transport_Layer_Security
Ietf: http://tools.ietf.org/html/rfc5246

RSA Asymmetric algorithm

The RSA cipher represented a real turning point for practical applications with high quality, guaranteed security and reliability. The words "strong encryption" were used exactly with the availability of the RSA algorithm.
Following are the main features of the algorithm:

Practical applications of the RSA algorithm

To this day the RSA together with the AES algorithm is the most used algorithm in commercial systems.
It is used: RSA has been used in most digital data, information and telephone security applications.
The RSA has it's advantages of being a reliable and safe system but it also has the disadvantage of being very slow in data calculating. For this reason it is used in hybrid cryptographic systems that simultaneously use symmetric algorithms (AES) for the communication and data encryption phase and public key algorithms (RSA) for the safe delivery of the symmetric key (or session key) that is necessary for encrypting and decrypting the message.

AES (Advanced Encryption Standard)

AES (Advanced Encryption Standard) is a block of cipher algorithms. Currently, Mail1click uses it to encrypt servers hard disks with a 256-bit key. This algorithm has been chosen because of its very high security levels and performance, combined with rapidity of calculation.


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