Unique digital signature

A method for authenticating a unique digital signature comprising:

• extracting an adapted digital signature and a service id from said unique digital signature;
• testing said service id to ensure said service id is valid;
• verifying said adapted digital signature is valid by:
• retrieving a system key from a plurality of system keys;
• hashing said system key with an index number to form a hash value;
• converting said hash value from a binary format into a second digital format;
• comparing said hash value in said second digital format with said adapted digital signature;
• incrementing said index number;
• and
• repeating said act of hashing if said hash value in said second digital format and said adapted digital signature do not match;
• and
• in response to said act of verifying:
• setting an indicator in an authentication log file, said indicator designating said index number and said system key combination as used;
• and
• granting access to an electronic service corresponding to said service id.

A computer readable medium having stored therein one or more sequences of instructions for generating a unique digital signature, said one or more sequences of instructions causing one or more processors to perform a plurality of acts, said acts comprising:

• receiving a request for a unique digital signature;
• incrementing an index number corresponding to a system key;
• executing a one-way hash function, using said index number and said system key as inputs, said one-way hash function producing a hash value in a first digital format;
• transforming said hash value in said first digital format into a second digital format, and using said transformed hash value in said second digital format as an adapted digital signature;
• concatenating said adapted digital signature and said service id to form said unique digital signature;
• and
• returning said unique digital signature.

A computer readable medium having stored therein one or more sequences of instructions for authenticating a unique digital signature, said one or more sequences of instructions causing one or more processors to perform a plurality of acts, said acts comprising:

• extracting an adapted digital signature and a service id from said unique digital signature;
• testing said service id to ensure said service id is valid;
• verifying said adapted digital signature is valid by:
• retrieving a system key from a plurality of system keys;
• hashing said system key with an index number to form a hash value;
• converting said hash value from a binary format into a second digital format;
• comparing said hash value in said second digital format with said adapted digital signature;
• incrementing said index number;
• and
• repeating said act of hashing if said hash value in said second digital format and said adapted digital signature do not match;
• and
• in response to said act of verifying:
• setting an indicator in an authentication log file, said indicator designating said index number and said system key combination as used;
• and
• granting access to an electronic service corresponding to said service id.