1. A system that facilitates securing communications between two servers, comprising:
a mutual authentication component that authenticates a sender of a message, the sender can be any one of the two servers; and
a mutual authorization component that authorizes a receiver of the message, the receiver is the other of the two servers.
2. The system of claim 1, further comprising a channel encryption component that cryptographically secures a communication channel for the message.
3. The system of claim 2, the encryption component employs a TLS mechanism to secure the communication channel.
4. The system of claim 2, further comprising a challengeresponse component that verifies an identity of each of the authenticated and authorized servers.
5. The system of claim 1, the mutual authentication component is a Kerberos cryptographic mechanism.
6. The system of claim 5, the mutual authorization component is a Kerberos cryptographic mechanism.
7. The system of claim 1, the message is a SMTP message.
8. The system of claim 2, the encryption component employs a TLS mechanism to secure the communication channel, the mutual authentication component is a Kerberos cryptographic mechanism and the mutual authorization component is a Kerberos cryptographic mechanism.
9. A computer-implemented method of securing SMTP traffic between two servers, comprising:
authenticating a sender of the SMTP traffic; and
authorizing a receiver of the SMTP traffic.
10. The computer-implemented method of claim 9, the acts of authenticating and authorizing employ a Kerberos cryptographic technique.
11. The computer-implemented method of claim 10, further comprising:
encrypting a communication channel that facilitates transmission of the SMTP traffic.
12. The computer-implemented method of claim 11, the act of encrypting employs a TLS technique to secure the channel.
13. The computer-implemented method of claim 12, further comprising challenging the receiver to secure communications between the sender and the receiver.
14. The computer-implemented method of claim 13, further comprising analyzing a response from the receiver to avoid an unauthorized man-in-the-middle attack.
15. A system that facilitates security of communications between two Exchange servers, comprising:
means for authenticating a sender of a message from a first Exchange server; and
means for authorizing a receiver of the message at a second Exchange server.
16. The system of claim 15, further comprising means for securing a communication channel for the message.
17. The system of claim 16, further comprising means for verifying an identity of the sender and the receiver.
18. The system of claim 17, the means for securing the communication channel is a TLS mechanism.
19. The system of claim 18, the means for verifying the identity is a challengeresponse mechanism.
20. The system of claim 19, the means for authenticating the sender and the means for authorizing the receiver is a Kerberos cryptographic mechanism.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An impactor assembly for harvesting osteochondral plugs, comprising: a shaft having a proximal end and a distal end; a harvest guide cap extending from the distal end of the shaft; and a harvest guide configured to fit within the harvest guide cap, the harvest guide having an axis, a top, a sidewall with a slot extending from the top and a bottom, an interior cavity having a cross-section that is generally square or generally round, the inner cavity configured to receive either an orientation guide or a cutting device for orienting and harvesting osteochondral plugs; and a plurality of tissue engagement posts equal in axial length, extending substantially perpendicularly from the bottom of the harvest guide and configured to be driven into a bony tissue of a condyle and prevent the harvest guide from moving relative to the bony tissue of the condyle; the orientation guide further comprising: a body having an axis, a top, a sidewall perimeter and a bottom; a first foot extending from the bottom of the body; a second foot extending from the bottom of the body; a third foot extending from the bottom of the body and the first, second and third feet are equal in axial length, wherein the orientation guide is configured to rest on bony tissue and wherein the first foot, the second foot and the third foot are configured such that the orientation guide is properly oriented when all three of the first foot, the second foot and the third foot are in simultaneous contact with the bony tissue; a handle extending from the body, wherein the handle includes a portion that extends laterally beyond the sidewall perimeter and is substantially perpendicular to the axis to facilitate placement of the orientation guide within a sidewall slot of the harvest guide and facilitate retrieval of the orientation guide from within the harvest guide; wherein the orientation guide is configured to fit within the harvest guide and orient the harvest guide relative to bony tissue.
2. The harvest guide of claim 1, wherein the cutting device comprises an osteochondral chisel, a trephine, or a combination thereof.
3. The assembly of claim 1, wherein the impactor further comprises an internal cavity formed in the harvest guide cap, wherein the internal cavity is sized and shaped to fit over the harvest guide.
4. The assembly of claim 3, wherein the impactor further comprises an impact plate extending from the proximal end of the shaft.
5. A method for harvesting osteochondral plugs, comprising: placing an orientation guide within a harvest guide; engaging the harvest guide with bony tissue, wherein the harvest guide comprises a body having a top and a bottom, an interior cavity formed within the body from the top to the bottom configured to receive either the orientation guide for orienting the harvest guide on the bony tissue without penetrating the bony tissue with the orientation guide, or a cutting device, and at least one tissue engagement post extending substantially perpendicularly from the bottom of the body to maintain the cutting device substantially perpendicular to a tangent through a point on the bony tissue aligned with the cutting device, wherein the tissue engagement post of the harvest guide is configured to be driven into the bony tissue and prevent the harvest guide from moving relative to the bony tissue; removing the orientation guide from the harvest guide; and placing the cutting device within the harvest guide, wherein the cutting device is configured to harvest osteochondral plugs; the orientation guide further comprising: a body having an axis, a top, a sidewall perimeter and a bottom; a first foot extending from the bottom of the body; a second foot extending from the bottom of the body; a third foot extending from the bottom of the body and the first, second and third feet are equal in axial length, wherein the orientation guide is configured to rest on bony tissue and wherein the first foot, the second foot and the third foot are configured such that the orientation guide is properly oriented when all three of the first foot, the second foot and the third foot are in simultaneous contact with the bony tissue; a handle extending from the body, wherein the handle includes a portion that extends laterally beyond the sidewall perimeter and is substantially perpendicular to the axis to facilitate placement of the orientation guide within a sidewall slot of the harvest guide and facilitate retrieval of the orientation guide from within the harvest guide; wherein the orientation guide is configured to fit within the harvest guide and orient the harvest guide relative to bony tissue.
6. The method of claim 5, further comprising moving the cutting device through the harvest guide into the bony tissue to cut a perimeter surface of the osteochondral plug.
7. The method of claim 6, further comprising removing the cutting device from the bony tissue and the harvest guide.
8. The method of claim 7, further comprising removing the harvest guide from the bony tissue.
9. The method of claim 8, further comprising removing the osteochondral plug from the bony tissue.
10. The method of claim 5, further comprising placing the harvest guide and orientation guide on the bony tissue.
11. The method of claim 10, wherein the orientation guide has a first foot, a second foot, and a third foot extending therefrom, the method further comprising verifying that each foot is touching a surface of the bony tissue.
12. The method of claim 11, further comprising placing an impactor over the harvest guide.
13. The method of claim 12, further comprising tapping the impactor with a hammer in order to drive the harvest guide into the bony tissue.
14. The method of claim 5, wherein the cutting device comprises an osteochondral chisel, a trephine, or a combination thereof.