1. A method comprising:
providing pairs of cipher texts,
a first cipher text of each pair being an encryption of a first code,
a second cipher text of each pair being an encryption of a second code,
where each of the first and second codes consists of the same series of bits encoding the same identification number and at least one switch bit having a different value between the first and second codes; and
receiving an activation notification for one of the first or second cipher texts of a provided pair of cipher texts.
2. The method of claim 1 wherein providing pairs of cipher texts includes providing a roll having two parallel columns of labels such that one column includes first cipher texts and the other column includes second cipher texts.
3. The method of claim 1 wherein providing pairs of cipher texts includes providing certificates of authenticity each having a detachable tamper-evident portion, where the first cipher text of each pair is disposed upon the certificate of authenticity and the second cipher text of each pair is disposed upon the detachable tamper-evident portion.
4. The method of claim 1 wherein providing pairs of cipher texts includes providing a computer-readable file encoding the pairs of cipher texts according to a data structure that logically relates the first and second cipher texts of each pair.
5. The method of claim 1 wherein receiving the activation notification comprises receiving one of the cipher texts and a digital certificate.
6. The method of claim 5 further comprising storing a record of the activation in a database, the record including the digital certificate.
7. The method of claim 1 further comprising receiving a target associated with the cipher text of the activation notification.
8. The method of claim 1 further comprising receiving a cipher text from a requestor and locating a matching record in the database.
9. The method of claim 8 further comprising sending information from the matching record to the requestor.
10. The method of claim 9 wherein the information from the matching record is a subset of the matching record determined according to an access right of the requestor.
11. The method of claim 8 further comprising sending instructions to the requestor.
12. The method of claim 11 wherein the instructions pertain to a secondary security feature.
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 stationary exercise device, comprising:
a supporting frame;
a drive mechanism attached to the frame and including a crank wheel operably connected to a fan wheel having a plurality of fins extending outwardly therefrom and configured to circulate air;
a cover positioned over the fan wheel and having a series of slots formed in an outer peripheral surface thereof and configured to direct the circulated air generated by the fan wheel fins onto an exerciser using the device;
a pair of foot pedals attached to crankshafts extending from the crank wheel for actuating the drive mechanism; and
handlebars extending upwardly with respect to the frame.
2. The exercise device of claim 1, wherein the fan wheel includes an axle interconnecting opposing flywheels each having radial fins extending axially therefrom.
3. The exercise device of claim 2, wherein the cover comprises two covers rotatably positioned over the flywheels for selectively directing the circulated air generated by the fins of each flywheel.
4. The exercise device of claim 1, including a generally horizontal shaft extending from each foot pedal and a generally vertical tube extending from an end of the horizontal shaft generally opposite the foot pedal and configured to removably receive the handle bars to provide upper body movement of the exerciser using the device.
5. The exercise device of claim 4, wherein the handle bars are adjustably positioned within the tube to alter the height of the handle bars.
6. The exercise device of claim 1, including a holder having two sleeves attached to the frame of the device and configured to removably receive and support the handle bars in a stationary position during operation of the device.
7. The exercise device of claim 1, wherein the drive mechanism includes a belt rotatably associated with the crank wheel and the fan wheel, and a tensioning mechanism associated with the belt for adjusting the tension of the device.
8. The exercise device of claim 7, wherein the drive mechanism includes a chain rotatably extending between the crank wheel and a sprocket of a transmission gear, the belt rotatably extending between a flywheel of the transmission gear and the fan wheel.
9. The exercise device of claim 1, wherein each fin of the flywheel is curved to enhance the generation of circulated air.
10. A stationary exercise device, comprising:
a supporting frame;
a drive mechanism attached to the frame and including a crank wheel operably connected to a fan wheel having an axle interconnecting opposing flywheels having radial fins extending axially therefrom and configured to circulate air;
a cover rotatably positioned over each flywheel and having a series of slots formed in an outer peripheral surface thereof and configured to selectively direct the circulated air generated by the fins onto an exerciser using the device;
a pair of foot pedals attached to crankshafts extending from the crank wheel for actuating the drive mechanism;
a generally horizontal shaft extending from each foot pedal; and
a generally vertical tube extending from an end of the horizontal shaft generally opposite the foot pedal and configured to removably receive handle bars to provide upper body movement of the exerciser using the device.
11. The exercise device of claim 10, wherein the handle bars are adjustably positioned within the tube to alter the height of the handle bars.
12. The exercise device of claim 10, including a holder having two sleeves attached to the frame of the device and configured to removably receive and support the handle bars in a stationary position during operation of the device.
13. The exercise device of claim 1 0, wherein the drive mechanism includes a belt rotatably associated with the crank wheel and the fan wheel, and a tensioning mechanism associated with the belt for adjusting the tension of the device.
14. The exercise device of claim 13, wherein the drive mechanism includes a chain rotatably extending between the crank wheel and a sprocket of a transmission gear, the belt rotatably extending between a flywheel of the transmission gear and the fan wheel.
15. The exercise device of claim 10, wherein each fin of the flywheel is curved to enhance the generation of circulated air.
16. A stationary exercise device, comprising:
a supporting frame;
a drive mechanism attached to the frame and including a crank wheel, a belt rotatably associated with the crank wheel and a fan wheel having an axle interconnecting opposing flywheels having curved, radial fins extending axially therefrom and configured to circulate air, and a tensioning mechanism associated with the belt for adjusting the tension of the device;
a cover rotatably positioned over each flywheel and having a series of slots formed in an outer peripheral surface thereof for selectively directing the circulated air generated by the fins onto an exerciser using the device;
a pair of foot pedals attached to crankshafts extending from the crank wheel for actuating the drive mechanism;
a generally horizontal shaft extending from each foot pedal;
a generally vertical tube extending from an end of the horizontal shaft generally opposite the foot pedal and configured to removably receive handle bars to provide upper body movement of the exerciser using the device; and
a holder having two sleeves attached to the frame of the device configured to removably receive the handle bars and maintain the handle bars in a stationary position during operation of the device.
17. The exercise device of claim 16, wherein the handle bars are adjustably positioned within the tube to alter the height of the handle bars.
18. The exercise device of claim 16, wherein the drive mechanism includes a chain rotatably extending between the crank wheel and a sprocket of a transmission gear, the belt rotatably extending between a flywheel of the transmission gear and the fan wheel.