1. A method of transferring information stored in a machine readable document pertaining to a correspondent to a machine for examination, said information including a sensitive portion to be kept confidential during transmission, comprising the steps of:
assembling at said correspondent a message having a primary portion M1 containing said sensitive portion of said information retrieved from said machine readable document, and a secondary portion M2 containing less sensitive portion of said information and including a long term public key of said correspondent,
generating an encryption key e from a session private key and said long term public key of the correspondent,
encrypting said primary portion with said encryption key e to obtain a ciphertext C,
combining said ciphertext C and said secondary portion M2 and generating a signature component s of said correspondent from said combination,
transferring said signature component s, said ciphertext C and said secondary portion of M2 to the machine, said machine
generating a value from said signature component s, said ciphertext C and said secondary portion M2, generating an ephemeral private key, and utilizing said value and said ephemeral private key to generate a public session key from said value and said ephemeral private key,
forwarding said public session key to said correspondent and obtaining from said correspondent a further public key to permit recovery of said encryption key e, and
said machine recovering said primary portion M1 from said ciphertext C using said encryption key e.
2. A method according to claim 1 wherein said machine readable document is a passport and said machine is a verifier of said passport.
3. A method according to claim 2 wherein said primary portion M1 contains biometric information and said machine compares said biometric information to a reference input.
4. A method according to claim 1, wherein said ciphertext C and said secondary portion M2 are combined by hashing to obtain a hash h.
5. A method according to claim 4 wherein said signature component s is obtained from a combination of a long term private key d of said correspondent, a private session key k and said hash h.
6. A method according to claim 5 wherein said private session key k is used to generate said encryption key e.
7. A method according to claim 6 wherein said private session key k and said long term public key are used to generate said encryption key e.
8. A method according to claim 1, further comprising checking redundancy of the primary portion and adding additional data to the primary portion prior to encrypting said primary portion if redundancy is below a pre-determined level of redundancy.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A tailgate apparatus for a refuse collection apparatus, the tailgate apparatus including:
an upper portion, a lower portion, a lower front edge, a rear edge, and lateral sides;
an upper panel extending between the lateral sides and pivotally connected to the lateral sides adjacent the rear edge and pivotable within the upper portion about a fixed pivot axis defined by the pivotal connection;
a packer panel connected to the upper panel; and
a pack cylinder having a rod end and another end spaced from the rod end, one of said ends being operatively connected to the upper panel and the other of said ends being connected to the lower portion adjacent the lower front edge, and the pack cylinder being operative for moving said upper panel and said packer panel from a lower position to an upper position to pack the refuse.
2. A tailgate apparatus as set forth in claim 1, including a sweep cylinder with an end connected to the upper panel and another end connected to the packer panel.
3. A tailgate apparatus as set forth in claim 1, including opposite sidewalls, and wherein the pack cylinder is disposed upon an outer side of one of the sidewalls.
4. A tailgate apparatus for a refuse collection apparatus, the tailgate apparatus including:
an upper portion, a lower portion, a front edge, and a rear edge;
an upper panel pivotally connected adjacent the rear edge and pivotable within the upper portion about a fixed pivot axis;
opposite sidewalls each having an arcuate slot therethrough, each arcuate slot having an arcuate center at the fixed pivot axis;
a beam extending through each arcuate slot and effectively connected to the upper panel;
a packer panel connected to the upper panel;
a pack cylinder located outside the sidewalls and operatively connected to the beam for moving the upper panel and the packer panel between upper and lower positions; and
the upper panel having portions that cover the arcuate slots during movement between said upper and lower positions.