Abstract: An embodiment provides new joiners to a conversation with access to historical keys using an encrypted skip list that can be safely stored on untrusted servers. This list provides random access to conversation content with logarithmic complexity (queries and data size), and imposes small (log-scale) overhead on linear/full access to the conversation content.

Abstract: An embodiment provides new joiners to a conversation with access to historical keys using an encrypted skip list that can be safely stored on untrusted servers. This list provides random access to conversation content with logarithmic complexity (queries and data size), and imposes small (log-scale) overhead on linear/full access to the conversation content.

Abstract: A shelving system includes brackets attached to support posts to hold the shelves above a horizontal support surface, such as a ground or floor. The support posts have a plurality of spaced apart projecting pins extending from opposite sidewalls thereof. The brackets each have a flange that defines holes to receive respective ones of the projecting pins. Each bracket is further secured to a support post with a C-shaped locking clip having first and second arms with hook-shaped fingers that hook around respective pins on opposite sidewalls of the support post. One of the arms of the C-shaped locking clip holds the bracket flange against the inner sidewall of the support post and the hook-shaped finger of such arm mates with one of the pins received in one of the holes of the bracket.

Abstract: A food shield has shield panels that are location adjustable and angularly adjustable in respect of support posts coupled to a buffet table or cart. For vertical or location adjustment of a shield panel in relation to a post, a bracket assembly includes outer and inner collar portions, a grip element positioned between the outer and inner collar portions, and a tightening element that tightens the connection of the assembled collar against support posts. A lever is set to lock the outer and inner collar portions to one another, and pulled to release the collar portions. For angular adjustment, each bracket assembly includes an indexing base, a rotatable arm assembly with an indexing hub, and a removable or retractable coupling element. The bracket assembly further has clamps that engage the shield panel at or near each of the front and rear panel edges.

Abstract: A food shield has shield panels that are location adjustable and angularly adjustable in respect of support posts coupled to a buffet table or cart. For vertical or location adjustment of a shield panel in relation to a post, a bracket assembly includes outer and inner collar portions, a grip element positioned between the outer and inner collar portions, and a tightening element that tightens the connection of the assembled collar against support posts. A lever is set to lock the outer and inner collar portions to one another, and pulled to release the collar portions. For angular adjustment, each bracket assembly includes an indexing base, a rotatable arm assembly with an indexing hub, and a removable or retractable coupling element. The bracket assembly further has clamps that engage the shield panel at or near each of the front and rear panel edges.

Abstract: A food shield has shield panels that are location adjustable and angularly adjustable in respect of support structures (posts) that are coupled to a mounting surface, such as a surface of a buffet table or cart. For vertical or location adjustment of a shield panel in relation to a post, a bracket assembly includes outer and inner collar portions, a grip element positioned between the outer and inner collar portions, and a tightening element that tightens the connection of the assembled collar against support posts. For angular adjustment, each bracket assembly includes an indexing base, a rotatable arm assembly with an indexing hub, and a removable or retractable coupling element. Alternative bracket assemblies provide support elements that contact one face of the shield panel, in addition to having clamps that engage the shield panel at or near each of the front and rear panel edges.

Abstract: A food shield has shield panels that are location adjustable and angularly adjustable in respect of support structures (posts) that are coupled to a mounting surface, such as a surface of a buffet table or cart. For vertical or location adjustment of a shield panel in relation to a post, a bracket assembly includes outer and inner collar portions, a grip element positioned between the outer and inner collar portions, and a tightening element that tightens the connection of the assembled collar against support posts. For angular adjustment, each bracket assembly includes an indexing base, a rotatable arm assembly with an indexing hub, and a removable or retractable coupling element.