There is already a published US equivalent to this French-language patent (i.e. an English translation). The relevant portion of the claim and the corresponding part of the description have been translated as follows:

1. A method for managing a user's public key, said user having a unique identifier, the method comprising:
(a) a step of certification comprising:
generating at the level of a certifying entity at least a password;
transmitting from said certifying authority to said user at least one secret data associated with at least one password;
deducing at the level of said user, said at least one password of said at least one secret data;

At least one of these aims is reached according to the present invention by a method for the management of the public key of a user, said user having a unique identification, characterized in that it includes:
a step of certification consisting in:
[0032] generating, at the level of a certifying entity, at least one password;
[0033] transmitting from said certifying authority to said user, at least one secret data associated with said at least one password;
[0034] deducing, at the level of said user, said at least one password from said at least one secret data;
http://www.patentstorm.us/applications/20100318787/fulltext....

The claims and the description have presumably been translated at different times or by two different people - in the French version, these two passages are identical, so they should also be identical in the translation (extremely important in a patent).

Also, it will sound odd to anyone not used to patents, but "ledit au moins un" should be translated as "(the) said at least one" password etc.. It is important for the scope of protection not to omit the fact that reference is being made to something already mentioned and that there is at least one of that something (i.e. leaving open the possibility that there may be more than one).