Abstract: A management method for authenticating a user of a device on an equipment item that is accessed by password. The method includes: acquiring a first password by the equipment item, the password being a result of a calculation based on a first secret data item; access by the user to the equipment item, which includes: the equipment item receiving a second password which is calculated by the device based on a second secret data item; and authenticating the user of the device on the equipment item if the second password received during the receiving corresponds to the first password obtained during the acquisition.

Abstract: Digital data blocks are encrypted, each data block that is to be encrypted being associated with a time reference. A value of an initialization vector Vi and an encryption key K are defined. Then, a counter C is obtained for each data block to be encoded, by combining the time reference and the value of the initialization vector. A series of binary encryption elements is obtained via an encryption function taking the encryption key K and counter C as input parameters. The data block is then encrypted by combining it with the series of binary encryption elements.

Abstract: Digital data blocks are encrypted, each data block that is to be encrypted being associated with a time reference. A value of an initialization vector VI and an encryption key K are defined. Then, a counter C is obtained for each data block to be encoded, by combining the time reference and the value of the initialization vector. A series of binary encryption elements is obtained via an encryption function taking the encryption key K and counter C as input parameters. The data block is then encrypted by combining it with the series of binary encryption elements.

Abstract: The inventive method for reading data received in the protected form consists in transmitting at least certain protected data to a protection removing tool. The protected data is retrieved from a buffer memory of a read stream of said data and is transmitted to the protection removing tool by a security message router. To transmit between said security message router and the protection removing tool, data is recorded in assigned transfer frames.